59 results about "Gaseous diffusion" patented technology

The invention discloses a phosphorane mixed gas filling method, and relates to the technical field of mixed gases, the phosphorane mixed gas filling method comprises instrument pretreatment, step-by-step filling, post-vacuum treatment, quality detection and safety monitoring, and the phosphorane mixed gas filling method has the advantages that a mixed accelerant is added into a filling pipeline in the phosphorane and argon filling process, so that the filling efficiency is improved; by providing a large number of active sites and unique gas diffusion channels, uniform mixing of phosphorane and argon can be accelerated, the uniformity and accuracy of mixed gas matching are improved, in the process of action of an accelerant and gas, argon molecules are fully contacted and collided with dissociated and adsorbed phosphorus atoms under the guidance of a special structure of a nano-porous material, and the phosphorus atoms are separated and adsorbed. The mixed accelerant is added to promote rapid and uniform mixing of the phosphorus and the alkane, stable and accurate-proportion phosphorus and alkane mixed gas is formed, and in the whole process, the mixed accelerant continuously plays a role, so that the uniform mixing efficiency of the mixed gas in the filling process is greatly improved compared with a traditional mode.

The invention relates to the technical field of chemical gas, in particular to a chlorine leakage detection method and system in reaction kettle production. The method comprises the following steps: acquiring chlorine concentration values and wind field vectors of a plurality of positions around a reaction kettle at each moment; marking any moment as a target moment, and determining the gas diffusion contribution coefficient of each position to other positions at the target moment; determining a real gas diffusion contribution coefficient of each position to other positions at the target moment; determining the airflow correction density of each position at the target moment; and positioning a chlorine leakage source by using a density peak clustering algorithm based on the airflow correction densities of all positions at the target moment. According to the method, the wind field vector is introduced to construct the gas diffusion contribution coefficient to correct the density, the limitation of traditional static diffusion is overcome, the real leakage source and the concentration convergence point in the downwind direction are effectively distinguished, the accuracy and reliability of chlorine leakage source positioning are improved, and support is provided for safe emergency disposal.

Method and system for electrochemically compressing hydrogen. In one embodiment, the system includes a membrane electrode assembly (MEA) that includes a polymer electrolyte membrane (PEM), an anode, and a cathode. First and second gas diffusion media are positioned adjacent the cathode and anode, respectively. A humidifying membrane is positioned next to the second gas diffusion medium on a side opposite the anode. A water supply is connected to the humidifying membrane, and a hydrogen gas supply is connected to the second gas diffusion medium. A hydrogen gas collector including a back pressure regulator is connected to the first gas diffusion medium. Separators, positioned on opposite sides of the MEA, are connected to a power source. In use, hydrogen is electrochemically pumped across the MEA and collected in the hydrogen gas collector. The PEM is kept properly humidified by the humidifying membrane, which releases water into the second gas diffusion medium.

The application discloses a kind of based on heat trigger solid-liquid reaction's goaf spontaneous combustion initiative inerting device and method, belong to coal mine fire prevention technical field, first based on experimental data, goaf beam tube monitoring and numerical simulation determine goaf high temperature prevention area, under the influence of setting safety margin and considering the maximum thickness of residual coal determine the starting temperature of adaptive inerting device, then according to goaf residual coal thickness, porosity, oxygen concentration field and high temperature prevention area area calculate out initiative inerting device size and reagent filling amount, finally combine the effective coverage area of single device and honeycomb grid generation algorithm, design initiative inerting device dynamic pre-buried point, and pre-bury initiative inerting device in coal mining face, when device reaches the high temperature protection area of goaf deep, temperature sensing guide column paraffin melt, aluminum sulfate solution in liquid reagent storage tank flows into solid reaction bin and sodium bicarbonate reaction along guide column, generate a large amount of CO2 from exhaust port, rapidly reduce local oxygen concentration, eliminate goaf spontaneous combustion hazard.The core innovation of the application is to abandon the traditional passive prevention mode relying on gas diffusion, and instead adopt the initiative control mechanism of "temperature sensing trigger-in-situ reaction-directional release", so that CO2 directly acts on the high temperature area through the directional exhaust port, rapidly reduces the local oxygen concentration, cuts off the necessary condition of coal spontaneous combustion from the source, realizes the initiative identification and accurate inerting of goaf high temperature area, and ensures the safety production of coal mining face.

The invention relates to a high-purity reactor for regenerating low-concentration bicarbonate and application of the high-purity reactor. The reactor comprises a cathode end plate, a gas diffusion cathode, a cation exchange membrane, an intermediate plate, a proton exchange membrane, an anode and an anode end plate which are sequentially arranged, the middle plate is provided with a middle cavity, a third feeding port and a third discharging port, and a solid electrolyte layer is arranged in the middle cavity; the cathode end plate is provided with a first feed port, a first discharge port and a groove-shaped first runner, and the anode end plate is provided with a second feed port, a second discharge port and a groove-shaped second runner; the reactor utilizes low-concentration bicarbonate to regenerate high purity on the basis of an electrochemical principle, the utilization rate of resources such as oceans / lakes is increased, the regeneration purity is 99%, industrial-grade current density can be achieved, the stability of the reactor is high, and the reactor has industrial application potential and wide application prospects.

This application relates to the technical field of dust removal, and in particular to a multi-stage dust removal device and method for coal mine roadways with impact resistance. The device includes an upward-opening water tank with an outlet on the side. A rotating shaft is rotatably mounted on the bottom of the water tank via a bearing. A cavity for air passage is formed inside the rotating shaft. A pushing mechanism is installed on the part of the rotating shaft located inside the water tank, and a pre-treatment mechanism that cooperates with the cavity is installed on the top of the rotating shaft. The pushing disc and the fan-shaped plate cooperate to push impurities floating on the water surface upward, which can effectively remove floating impurities on the water surface and prevent them from forming a barrier film on the water surface. This creates an unobstructed channel for gas diffusion. That is, when the water surface is kept clean and unobstructed, the gas can escape from the water surface more smoothly, the separation efficiency of impurities and gas is significantly improved, and thus the dust removal effect of the gas is greatly improved.

A gas sensing device is manufactured with three dimensionally connected metal oxide foam structure of large surface area and elongated channel pores within the three-dimensional porous structure for gas sensing applications, thereby increasing the surface area of the sensing layer and expediting sensitivity and sensor response. A gas sensor device includes the fabricated metal-oxide-foam sensing material attached via silver paste to platinum electrodes and ruthenium heater that are printed on low temperature co-fired ceramic substrate. This device will provide improved gas sensing performance with improved sensitivity and response time. Gas sensors including the metal oxide foam sensing material exhibit higher sensitivity to toxic gases such as ethanol and carbon monoxide due to the large surface area achieved from the porous three-dimensional structure providing increased chemical reaction sites and the larger porous channels allowing gases to easily pass, shortening the gas diffusion reaction path.

The present application relates to the technical field of chemical gas, and particularly relates to a method and system for detecting chlorine leakage in the production of a reaction kettle. The method comprises: obtaining chlorine concentration values and wind field vectors of multiple positions around the reaction kettle at each time; taking any time as a target time, determining a gas diffusion contribution coefficient of each position to the remaining positions at the target time; determining a real gas diffusion contribution coefficient of each position to the remaining positions at the target time; determining a gas flow correction density of each position at the target time; and based on the gas flow correction densities of all positions at the target time, locating a chlorine leakage source by using a density peak value clustering algorithm. The present application corrects the density by introducing the wind field vector to construct the gas diffusion contribution coefficient, overcomes the limitations of the traditional static diffusion, effectively distinguishes the real leakage source and the concentration collection point downwind, improves the accuracy and reliability of the chlorine leakage source positioning, and provides support for safety emergency disposal.

The present application relates to an atomic layer deposition system, comprising: a body, a carrier, a gas spraying module and a first ring. The body surrounds a reaction chamber; the carrier is located in the reaction chamber. The gas spraying module is arranged on the body and comprises at least one gas inlet and at least one gas diffusion plate between the carrier and the at least one gas inlet, each gas diffusion plate comprises a plurality of perforations. The first ring defines a radial direction and is arranged between the carrier and the at least one gas diffusion plate. The plurality of perforations distributed in the area of the at least one gas diffusion plate defines an outermost distribution contour, the radial dimension of the inner wall of the first ring is greater than the radial dimension of the outermost distribution contour, and the inner wall of the first ring and the outermost distribution contour maintain a distance in the radial direction. The inner wall of the reaction chamber of the present application is not easy to generate residues, effectively reduces the production cost and has good manufacturing effect.

To provide a gas diffusion plate detecting method that accurately predicts the use life of a gas diffusion plate, reduces production costs, and improves production efficiency and electronic equipment therefor, and a gas diffusion plate detection device.SOLUTION: A gas diffusion plate detection method includes: acquiring image data and contour data on a gas diffusion plate to be detected; detecting the hole diameter and surface flatness of the gas diffusion plate to be detected; and estimating the use life of the gas diffusion plate to be detected based thereupon.SELECTED DRAWING: Figure 1

The invention relates to the technical field of mine safety monitoring and gas detection, and discloses a sensor for mine AI identification of automobile exhaust and fire source CO. The sensor comprises a dual-channel sensitive element which is arranged in the same gas chamber and has a cross-sensitive characteristic; the signal conditioning acquisition module carries out digital processing on the original signal; the dynamic hysteresis compensation module carries out time domain alignment on the two paths of signals based on the fluid dynamic characteristics of the gas chamber, and response asynchronization caused by gas diffusion difference is eliminated; the concentration decoupling calculation module constructs a linear equation set by using a sensitivity matrix, and separates the real-time concentrations of carbon monoxide and nitrogen oxide; and the intelligent identification early warning module logically distinguishes gas sources according to the concentration threshold. Through the hydrodynamic compensation and linear decoupling algorithm, calculation errors caused by electrochemical sensor cross interference and response lag are effectively solved, accurate recognition of rubber-tyred vehicle tail gas and real fire hazards is achieved, and the mine false alarm rate is reduced.

Described is an electrolyzing device comprising a first electrode configured to generate a first gas and a second electrode configured to generate a second gas. The first and second electrodes are arranged to face each other to define an electrolyte space for receiving an electrolyte between the first electrode and the second electrode. At least one of the first and second electrode is a gas diffusion electrode comprising a gas diffusion backbone layer facing away from the electrolyte space and comprising conductive porous material; a catalyst layer facing the electrolyte space and comprising an electrochemically active catalyst, wherein the catalyst layer further comprises hydrophobic particles with an average size of 10 nm - 5 µm, and a microporous layer comprising conductive particles with an average size of 15 nm - 2 µm and hydrophobic particles with an average size of 10 nm - 5 µm and arranged between the gas diffusion backbone layer and the catalyst layer. Also described are a gas diffusion electrode for use in said device, as well as a method of manufacturing said gas diffusion electrode.

The utility model discloses a kind of drying device, it includes box and gas storage tank, gas diffusion plate and heating element from top to bottom being arranged in the inside of the box, the top of the box is provided with several air inlet holes, bottom is provided with several air outlet holes, the bottom of the gas storage tank is provided with several first diffusion holes, the gas diffusion plate is provided with several second diffusion holes, gas is entered into the gas storage tank from the air inlet hole and sequentially diffused to the heating element on the first diffusion hole, second diffusion hole heating, heated gas is blown out through the air outlet hole. The utility model improves the uniformity of gas distribution, so that gas heating is more sufficient, uniform, can guarantee the uniformity of product drying, can avoid the phenomenon of local overheating, so as to guarantee the drying quality of product.

The application provides a spraying assembly, a reactor of a deposition device and an air inlet and outlet system thereof. The spraying assembly is arranged in a cavity of the reactor and comprises a gas passage plate arranged at an upper portion of the cavity and a shower head arranged in the cavity. The gas passage plate is provided with a gas inlet and a gas outlet. The gas inlet is arranged at a central portion of the cavity on the gas passage plate, and the gas outlet is arranged at a position deviated from the central portion. The shower head comprises a first region provided with a plurality of spraying holes and a second region provided with a plurality of exhaust holes. The spraying holes make the gas diffusion cavity and the reaction cavity in fluid communication, and the exhaust holes are in fluid communication with the gas outlet. The uniformity of the process gas flow distribution in the reaction cavity is adjusted by adjusting the size, shape and distribution of the spraying holes in the first region and / or adjusting the size, shape and distribution of the exhaust holes in the second region, so as to accurately control the uniformity of the thickness of the film formed by the deposition device and the film forming quality, thereby improving the production efficiency of the thin film deposition.

The invention relates to a method for inhibiting toxic and harmful gas in a leachate pool of an urban garbage dump. The method comprises the steps of three-dimensional closed system construction, precise spraying adsorption system configuration and flexible operation and maintenance of an auxiliary system. According to the invention, gas diffusion is blocked through the three-dimensional sealing cover, and a high-pressure micro-mist spraying technology is combined, so that micron-sized adsorbent mist is in full contact with harmful gas, the adsorbent has high-efficiency adsorption capacity on multi-component gases such as hydrogen sulfide and carbon monoxide, the concentration of the harmful gas in a sealed space is greatly reduced, and the removal efficiency can reach 90% or above; the selected composite adsorbent takes modified zeolite as a core component, harmless treatment or recycling can be performed after adsorption saturation, and no new pollutants are generated; meanwhile, the closed system avoids direct contact between the adsorbent and the external environment, and overcomes the defects that in the prior art, the treatment efficiency of poisonous and harmful gas in the percolate pool of the urban garbage dump is low, the poisonous and harmful gas is easy to diffuse, and secondary pollution is possibly generated.

Method for determining a diffusion coefficient of a diffusion of a first gas (79) through a porous material (2) into a second gas (80) at a gas pressure increased by at least 900% compared to atmospheric pressure, - wherein a sample (1) of the porous material (2) is arranged as a partition of defined thickness between a first gas space (58) and a second gas space (59), wherein the first gas space (58) is at least 5 times the size of an open pore volume of the sample (1), - wherein the first gas space (58), the open pore volume of the sample (1) and the second gas space (59) are purged with the first gas (79), - wherein the purging with the first gas (79) is completed and the first gas space (58) adjacent to the sample (1) is sealed off, - wherein the second gas (80), which is distinguishable from the first gas (79), is subsequently introduced into the second gas space (59) with a defined volume flow rate, and a gas mixture (81) comprising the second gas (80) and components of the first gas (79) is discharged from the second gas space (59), - wherein the diverted gas mixture (81) is maintained at the increased gas pressure and - wherein a concentration profile of the proportion of the first gas (79) in the gas mixture (81) derived from the second gas space (59) is recorded and analyzed with respect to the diffusion coefficient.

The application discloses a phosphine mixed gas filling method, and relates to the technical field of mixed gas, which comprises instrument pretreatment, step-by-step filling, post-vacuum treatment, quality detection and safety monitoring. The phosphine mixed gas filling method has the advantages that: by adding a mixing accelerator in the filling pipeline during the filling of phosphine and argon, a large number of active sites and unique gas diffusion channels are provided to accelerate the uniform mixing of phosphine and argon, and the uniformity and accuracy of the mixed gas ratio are improved. During the action of the accelerator and the gas, the argon molecules fully contact and collide with the dissociated and adsorbed phosphorus atoms under the guidance of the special structure of the nano-porous material, the uniform mixing of the two is promoted, and the stable and accurately-proportioned phosphine mixed gas is formed. During the whole process, the mixing accelerator continuously plays a role, so that the uniform mixing efficiency of the mixed gas during the filling process is greatly improved compared with the traditional method.

The invention relates to the technical field of gas sensors, in particular to a potential type carbon dioxide sensor based on a porous spherical ZnCo2O4-ZnO sensitive electrode, which comprises a solid electrolyte substrate, a platinum reference electrode, the porous spherical ZnCo2O4-ZnO sensitive electrode, a signal acquisition component and a fixing assembly. The sensitive electrode is prepared through a hydrothermal method, electrostatic spinning and other processes, and has high specific surface area and excellent gas diffusion performance. According to the invention, the detection sensitivity, selectivity and response speed of carbon dioxide can be obviously improved, the cross sensitivity is reduced, and high-precision monitoring requirements in a complex environment are met. Tests show that the sensor has the characteristic of quick response to low-concentration carbon dioxide at 450 DEG C and has a good application prospect.

This invention provides a dual-channel gas spray head, an air intake device, and a vapor deposition apparatus. The gas spray head has a first gas diffusion chamber and a first gas convergence chamber surrounding a gas equalization disk. The equalization disk includes a first gas delivery channel and a second gas delivery channel. The gas delivery channel includes a transverse channel and a longitudinal channel. The transverse channel includes a first transverse channel arranged transversely within the equalization disk along a first direction, with its two ends connected to the gas diffusion chamber and the gas convergence chamber, respectively. The longitudinal channel extends longitudinally from the first transverse channel to the lower surface of the equalization disk. A portion of the first gas reaches the first gas convergence chamber via the first transverse channel, and another portion of the first gas reaches the reaction chamber via the first transverse channel and the longitudinal channel. The second gas delivery channel extends longitudinally through the equalization disk and is spaced apart from the longitudinal channel. The second gas reaches the reaction chamber via the second gas delivery channel. This invention can improve the replacement efficiency of the gas spray head and the uniformity of the gas phase precursor intake.

This invention discloses an experimental platform and method for simulating the leakage and diffusion of toxic gases under obstacle movement conditions. The experimental platform includes a toxic gas leakage model, a gas release system, and a data acquisition system. The toxic gas leakage model includes a gas diffusion chamber and a movable obstacle. The movable obstacle consists of obstacle components and a moving component, the moving component being a wirelessly controlled remote-controlled vehicle model whose speed can be controlled remotely. The gas release system includes a gas storage device, a flow control device, and a connecting conduit. The data acquisition system includes gas detection instruments, a camera, a thermometer, and a hygrometer for data acquisition within the diffusion chamber. This invention can effectively simulate the impact of turbulence generated by obstacle movement on the leakage and diffusion of toxic gases, thereby obtaining accurate experimental data. It can provide reliable experimental and data support for research on large-scale personnel evacuation and emergency rescue in toxic gas diffusion scenarios.

This invention discloses a method and system for diagnosing gas leaks in outdoor GIS equipment, relating to the field of power equipment monitoring technology. The method includes acquiring time-series data synchronously collected by a mobile inspection platform moving along the periphery of the GIS equipment, including the original concentration of sulfur hexafluoride gas, ambient wind speed, wind direction angle, and platform spatial coordinate sequence; denoising the original concentration sequence and compensating for environmental wind field interference by combining the wind speed and wind direction angle sequences to generate a corrected concentration sequence; inputting this into a preset sensor dynamic response inverse model to obtain an instantaneous true concentration estimation sequence compensated for physical response lag; smoothing and interpolating the platform spatial coordinate sequence trajectory to generate a continuous motion trajectory function; spatiotemporally fusing the instantaneous true concentration estimation sequence with the motion trajectory function to generate a spatial concentration distribution function, and determining the spatial coordinates of the leak source by searching for its global or local maxima. This invention can eliminate the influence of wind field on gas diffusion and improve the accuracy of leak concentration measurement.

The present application relates to the technical field of gas packaging container, and particularly relates to a gas cylinder filled with adsorptive solid particles in a fluidized manner and a manufacturing method thereof. By arranging an inner part with a plurality of through holes on the surface in the gas cylinder body, the adsorptive solid particles can enter the first cavity through the upper cylinder nozzle in a fluidized manner, and cannot enter the second cavity in the inner part through the through holes. The gas adsorbed by the adsorptive solid particles can enter the second cavity through the through holes after desorption, and is discharged to the outside through the lower cylinder nozzle. That is, the gas passage for desorption of the gas is provided in the gas cylinder body, the gas diffusion passage is reduced, the gas flow resistance is reduced, and the gas can be released without overcoming high axial resistance. In this way, the adsorptive solid particles cannot flow out of the gas cylinder body, and the gas adsorbed by the solid particles can be uniformly desorbed and released, so that the gas adsorbed by all the solid particles in the gas cylinder body can be desorbed at a lower pressure.

Disclosed are a device and method for determining gas diffusion coefficient in rocks. The device includes: a core holder, a sampling mechanism, a gas analyzer, a gas source and a pressure gauge. A middle part of the core holder holds a rock sample, two sampling mechanisms are symmetrically arranged at two ends of the rock sample, each sampling mechanism includes a first blind tube, a cylinder, a second blind tube and a sampling cavity, an open end of the first blind tube faces the rock sample and is in sealing connection with an end surface of the rock sample to form a diffusion chamber. A single sampling cavity is isolated from the diffusion chamber, and the pressure of the diffusion chamber is not affected, so that undisturbed sampling is achieved, the influence on the pressure of the diffusion chamber is reduced, and the accuracy of the determination results is improved.

A gas diffusion member capable of tumbling is provided. The gas diffusion member is composed of a material having flexibility, and is disposed between a separator and a catalyst layer of a fuel cell, the gas diffusion member including: a gas diffusion portion including a plurality of first grooves and first ribs that constitute a gas flow path on a planar surface of the separator side, the plurality of first grooves being formed in a first direction, the first ribs being formed between adjacent first grooves; and an introduction portion connecting a manifold for supplying a gas to be introduced into the gas diffusion portion and the gas diffusion portion, wherein the introduction portion includes a plurality of second grooves having a second direction different from the first direction of the first grooves, second ribs formed between adjacent second grooves, and third grooves having a direction identical to the first direction.

The invention relates to the field of chemical reagent storage, in particular to a reagent storage device for chemical experiments. The invention provides a chemical experiment reagent storage device which comprises a storage cabinet, the interior of the storage cabinet is divided into an upper compartment and a lower compartment, an exhaust pipe and an exhaust fan are arranged on the top wall of the storage cabinet, each compartment is provided with a closed closing door, and glass facilitating observation is arranged on the closing door on the upper side. Symmetrically distributed guide frames are fixedly connected to the inner wall of the upper compartment, a rotating plate is rotationally connected to an opening of each guide frame, and a torsional spring is connected between the rotating plate and the adjacent guide frame. Through linkage of the automatic sealing device and the highly toxic gas monitoring system, the cabinet door is locked in time, and gas diffusion is prevented; a fool-proof mechanism ensures cooperative operation of two persons, and errors are avoided; the storage box collects leaked liquid, the rotating plate controls the guide frame channel to be opened and closed, storage and taking convenience, leakage prevention performance and emergency treatment efficiency are optimized, and the safety of a laboratory is remarkably improved.

The application discloses a kind of toxic gas leakage diffusion range simulation prediction method, it is related to electric digital data processing technical field, can solve the technical problem that present stage is difficult to consider prediction accuracy and real-time when simulating and predicting the leakage diffusion range of toxic gas, leading to unable to provide accurate and efficient decision support for emergency response, comprising: obtaining the gas diffusion related data of gas leakage area;According to the gas diffusion related data, humidity intensity correction term is constructed;Wherein, humidity intensity correction term is used to correct the influence of air humidity on toxic gas diffusion concentration;According to the gas diffusion related data, water gas phase solution correction term is constructed;Wherein, water gas phase solution correction term is used to correct the influence of water area on toxic gas diffusion concentration;According to humidity intensity correction term, water gas phase solution correction term and preset gas diffusion model, the leakage diffusion range of toxic gas is simulated and predicted, and the diffusion prediction result of toxic gas is obtained.

The invention discloses a high-precision quick-response double-gas detection electrochemical sensor and a detection method thereof, and relates to the technical field of electrochemical gas sensors. Comprising a sensing electrode (1), a reference electrode (2), an auxiliary electrode (3), a liquid absorption membrane (4), an electrolyte (5), a shell (6), a diffusion hole membrane (7), a gas diffusion hole (8), a gas chamber (9) and a shunting device (10), the diffusion hole film (7) is arranged on the outer side of the shell (6) of the sensor; the gas diffusion hole (8) is formed in the middle of the diffusion hole film (7); the air chamber (9) is arranged between the diffusion hole membrane (7) and the sensing electrode (1); and the shunting device (10) is arranged in the air chamber (9). According to the invention, on the basis of the difference of gas response time, the synchronous detection of CO and H2 can be realized by virtue of the mutual matching of the gas diffusion hole (8) with a proper size and the gas chamber (9).

The embodiment of the present application proposes a gas decomposition product concentration measurement method based on gas circulation, which is applied to a gas circulation device, the gas circulation device comprises a first gas chamber and a second gas chamber, both of which are used to be connected with a to-be-measured gas chamber, the first gas chamber is connected with the second gas chamber, and the method comprises the following steps: controlling the gas circulation device to perform gas mixing for a preset number of times; controlling the gas in the to-be-measured gas chamber to be transported into the first gas chamber, and stopping the gas transportation when the current pressure value is equal to the first pressure value; when the gas decomposition product concentration collected during the gas transportation is not less than a preset concentration threshold value, calculating a target gas decomposition product concentration. Through the gas circulation mode, the gas in the to-be-measured gas chamber is more fully mixed, the influence of the concentration change characteristic difference caused by the volume difference of the gas chamber on the detection result is reduced, the problem that it is difficult to obtain representative gas due to the slow gas diffusion speed is solved, and the accuracy of detecting the gas decomposition product concentration is improved.

The invention discloses a phosphorus-doped double-vacancy heterostructure material, a preparation method and application, and belongs to the technical field of electrocatalysis, polyacid is used as a precursor to prepare P-MoS2 rich in sulfur vacancies on carbon cloth through hydrothermal treatment, then part of MoS2 is converted into MoO2 in situ through heat treatment, and a P-MoS2 / MoO2 heterostructure is constructed. Abundant oxygen vacancies are generated in the thermal conversion process. Rich vacancy defects and heterogeneous interfaces in the constructed catalyst promote electron transfer and adsorption of active substances, charge transfer kinetics is improved, and more reaction active sites are provided for water cracking; the vertically crossed nanosheet network on the carbon cloth is beneficial to charge transport, reactant permeation and gas diffusion. Various components in the catalyst synergistically promote the water electrolysis process, and a novel advanced, economical, efficient and stable electrode material is provided for catalytic application.