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Method for constructing neutral glucose fuel cell electrode

A fuel cell electrode and glucose technology, which is applied in the field of electrochemical detection, can solve the problems that the oxidation performance is easily affected by pH, limits the performance and life of the electrocatalyst, and does not have the ability to catalyze glucose, and achieves good long-term stability and good catalytic effect , the effect of high electrochemical response

Pending Publication Date: 2022-06-03
DALIAN UNIV
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  • Abstract
  • Description
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Problems solved by technology

Although the above electrodes have prepared three-dimensional dendritic or spherical nanostructures by electrochemical methods, compared with the present invention, the catalytic current is low, lacks the protection of palladium, has poor stability, and low reproducibility
We have also applied for a patent for depositing gold on nano-silver wires before, but the amount of deposited gold was relatively small, so the deposited gold only has a nano-particle structure, no gold branch structure, and no palladium element deposited
Therefore, the nano-silver-gold material in the previous patent does not have the property of catalyzing glucose in neutral solution
[0006] Moreover, the glucose oxidation performance of traditional electrodes is easily affected by pH, and the performance and life of electrocatalysts will be limited under high alkaline and high acidic conditions.

Method used

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  • Method for constructing neutral glucose fuel cell electrode
  • Method for constructing neutral glucose fuel cell electrode
  • Method for constructing neutral glucose fuel cell electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1 Glucose solution and blank PBS solution cyclic voltammetry curve comparison

[0054] First, the three-electrode system was placed in a PBS solution with a pH of 7.4 and a concentration of 0.1 M, and cyclic voltammetry was used to scan in the potential range of -0.7V to 1.0V, and the cyclic voltammetry curve of the blank solution was recorded; then , the three-electrode system was placed in a 30 mM glucose test solution containing 0.1 M PBS solution with a pH of 7.4 as a supporting electrolyte, and cyclic voltammetry was used to scan in the potential range of -0.7 V to 1.0 V to record glucose. cyclic voltammetry curve.

[0055] The result is as Figure 4 Shown: The catalytic effect of the Pd-Au-PDMS electrode in 30 mM glucose was tested at a scan speed of 50 mV / s. It can be seen from the figure that the catalytic current of Pd-Au-AgNWs electrode towards glucose is 11900 μA / cm 2 / mol. It is shown that the fuel composed of Pd-Au-AgNWs electrode can efficie...

Embodiment 2

[0057] In 0.1M PBS solution, Pd-Au-AgNWs electrode, Pd-AgNWs electrode and Pd-AuNWs electrode were subjected to cyclic voltammetry responses in 30 mM glucose solution, respectively.

[0058] The three-electrode system was sequentially placed in different concentrations of glucose to be tested containing 0.1 M PBS solution with a pH of 7.4 as the supporting electrolyte, and the current curve of 30 mM glucose was measured at a scan rate of 50 mV / s. Anfa, scan in the potential range of -0.7V ~ 1.0V. The cyclic voltammetry curves of Pd-Au-AgNWs electrode, Pd-AgNWs electrode and Pd-AuNWs electrode with the same concentration and scan rate of glucose were recorded.

[0059] The result is as Figure 5 Shown: It can be seen from the figure that the Pd-Au-AgNWs electrode has the highest electrochemical activity in the glucose solution. Compared with the Pd-AgNWs electrode and the Pd-AuNWs electrode, the peak current density of the Pd-Au-AgNWs electrode is greatly improved, which can ...

Embodiment 3

[0061] Cyclic voltammetry responses of Pd-Au-AgNWs electrodes to different glucose solutions with the same concentration in 0.1M PBS solution.

[0062] The three-electrode system was sequentially placed in different concentrations of glucose to be tested containing 0.1M PBS solution with pH of 7.4 as the supporting electrolyte, and the measured concentrations were 10mM, 20mM, 30mM, 40mM, 50mM at a scan rate of 50mV / s. , 60 mM, 70 mM, 80 mM, 90 mM, 100 mM glucose current curves were scanned in the potential range of -0.7V to 1.0V by cyclic voltammetry. The cyclic voltammetry curves of glucose at different concentrations and scan rates were recorded.

[0063] The result is as Image 6 , Figure 7 Shown: It can be seen from the figure that as the concentration increases, the oxidation current of the nanoelectrode in the glucose solution also increases, and the oxidation peak also increases, showing a good linear response of catalyzing glucose. Therefore, the redox reaction of ...

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Abstract

The invention belongs to the technical field of electrochemical detection, and discloses a method for constructing a neutral glucose fuel cell electrode, which comprises the following steps of: uniformly coating silver nanowires on PDMS (Polydimethylsiloxane) serving as a substrate, depositing gold by adopting a chronoamperometry and depositing palladium by adopting a cyclic voltammetry to prepare a palladium-gold alloy nanoelectrode, and researching the influence of the palladium-gold alloy nanoelectrode on the oxidation performance of glucose under neutral conditions. By utilizing the flexibility of PDMS and the high specific surface area, high conductivity and high catalytic activity of the silver nanowires and the palladium-gold alloy, the prepared electrode has a good catalytic effect on glucose, high sensitivity and good selectivity, and meanwhile, the electrode is stable in performance and low in detection limit, and can be widely applied to the field of glucose detection. Due to the excellent performance, the Pd-Au-AgNWs electrode has a wide application prospect in the field of electrochemical sensors.

Description

technical field [0001] The invention belongs to the technical field of electrochemical detection, in particular to a method for constructing a neutral glucose fuel cell electrode. Background technique [0002] As a conversion device that can directly convert the chemical energy of fuel into electrical energy through electrochemical reactions, fuel cells are widely studied and applied because their power generation is not limited by the Carnot cycle and has high energy conversion efficiency. Glucose is the most widely distributed and abundant monosaccharide in nature, and it is also an important nutrient and one of the main sources of heat in the body. However, the chemical properties of glucose are very stable and difficult to be electrochemically oxidized. Therefore, glucose is directly used as a fuel cell. A major challenge in the current study of glucose fuel cells. Glucose oxidase is widely used in enzymatic fuel cells due to its selectivity towards glucose, but glucose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/86H01M4/90H01M4/92G01N27/327G01N27/48B82Y30/00B82Y40/00
CPCH01M4/8853H01M4/8647H01M4/9041H01M4/921H01M4/8657H01M4/8673B82Y30/00B82Y40/00G01N27/3278G01N27/3277G01N27/48Y02E60/50
Inventor 孙晶田文帅张瑜蔡伍琪徐志颖郎明非
Owner DALIAN UNIV
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