4results about How to "Reduce the electrolysis voltage" patented technology

The present application belongs to the technical field of extraction and utilization of high-value components in industrial tail gas, and discloses a device and method for extracting hydrogen from industrial tail gas. The device comprises a heat exchanger, a high-temperature-resistant ceramic cylinder, a direct-current power supply and a cooler. Water vapor is used as a carrier gas to carry out the prepared hydrogen, which can reduce the electrolysis voltage and the power consumption for extracting hydrogen. The method of applying an external voltage is used to provide the driving force for hydrogen extraction, which can extract hydrogen from tail gas with low hydrogen concentration and improve the utilization rate of hydrogen resources. The device and method for extracting hydrogen from low-hydrogen-content high-temperature industrial tail gas are provided to solve the problem that hydrogen cannot be directly extracted from high-temperature industrial tail gas with low hydrogen concentration, resulting in a large amount of hydrogen resource waste. The device and method can directly extract hydrogen from high-temperature industrial tail gas with low hydrogen content by using high-temperature proton conductor ceramics, and water vapor is used as a carrier gas to carry the extracted hydrogen, which can reduce the power consumption for extracting hydrogen and efficiently prepare high-purity hydrogen.

This invention belongs to the field of proton exchange membrane (PEM) water electrolysis for hydrogen production, and discloses a PEM anode slurry, a catalyst-coated membrane, and their preparation method. The anode catalyst is premixed with ultrapure water under ultrasonic and stirring conditions, then an alcohol solvent and an ionomer are added and stirred before high-speed shear dispersion. Following this, the anode slurry is prepared through nano-grinding and degassing processes. The catalyst coating effect is improved by adjusting the ratio of ionomer to catalyst, the solid content of the slurry, the slurry formulation, and the dispersion process. This invention yields a highly efficient dispersion slurry with high stability, low sedimentation, and a dense and uniform coating, thus improving coating efficiency and water electrolysis performance.

The invention relates to the technical field of catalysts, in particular to a cobalt-based phosphide nano catalytic material as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving a cobalt salt, urea and ammonium fluoride in water to obtain a mixed solution, placing a pretreated carbon cloth in the mixed solution, carrying out a hydrothermal reaction, taking out the carbon cloth to obtain a carbon cloth-loaded phosphating precursor, and carrying out hydrothermal reaction on the carbon cloth-loaded phosphating precursor in a protective atmosphere to obtain the carbon cloth-loaded phosphating precursor. Carrying out phosphating treatment with a phosphorus source; and carrying out constant piezoelectric deposition by taking the carbon cloth loaded cobalt phosphide as a working electrode and cobalt salt as an electrolyte to obtain the cobalt-based phosphide nano catalytic material. The cobalt-based phosphide nano catalytic material shows excellent catalytic activity, rapid reaction kinetics and good stability in HER, OER and full water splitting application, the preparation method is simple and controllable, the cobalt-based phosphide nano catalytic material is expected to replace a noble metal-based catalyst, and the cobalt-based phosphide nano catalytic material has a wide application prospect in the field of electro-catalysis energy conversion.

This invention belongs to the field of electrocatalytic materials technology, and discloses a PAN-modified NiCoP / NF catalyst for urea-assisted seawater electrolysis and its preparation method. The method uses nickel foam as a support, synthesizes a NiCo precursor via a melt method, and then obtains the catalyst through PAN solution impregnation and one-step phosphating. By controlling the PAN concentration, the morphology and structure of the catalyst can be optimized, achieving a concentration of 0.05 g / mL. 1 A preferred structure was obtained by combining fine nanorods (20-50 nm in diameter) with an appropriate amount of amorphous carbon layer. The material exhibited excellent hydrogen evolution activity in alkaline seawater electrolyte, at 10 mA cm⁻¹. 2 The overpotential at the specified current density is 44 mV. In an alkaline seawater-urea mixed electrolyte, the overpotential of the urea oxidation reaction at the same current density is 1.32 V, which is significantly lower than the overpotential of the oxygen evolution reaction by 180 mV, demonstrating the dual advantages of high efficiency, energy saving, and wastewater resource utilization. This invention features a simple process and controllable structure, showing promising application prospects in the fields of hydrogen production through water electrolysis and urea wastewater treatment.