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Membrane electrode assembly and method for hydrogen evolution by electrolysis

A membrane electrode group, anode technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve problems such as high price

Active Publication Date: 2020-06-19
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the noble metal Pt has been one of the most catalytic electrode materials, it is quite expensive

Method used

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  • Membrane electrode assembly and method for hydrogen evolution by electrolysis
  • Membrane electrode assembly and method for hydrogen evolution by electrolysis
  • Membrane electrode assembly and method for hydrogen evolution by electrolysis

Examples

Experimental program
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Effect test

preparation example 1

[0042] A Pt catalyst was deposited on a glassy carbon electrode (5mm OD×4mm H) using a reactive magnetron sputtering machine. Put the Pt target into the sputtering machine, apply power to the Pt target, and pass argon gas (flow rate of 20 sccm) into the machine, and the pressure inside the machine is 30 mTorr. Argon ions are used to strike the Pt target, and sputtering is carried out at room temperature for 5 to 6 minutes to form a Pt catalyst with a film thickness of about 100 nm on the glassy carbon electrode, and the coating amount of the catalyst is 0.042 mg.

preparation example 2

[0044] Using a reactive magnetron sputtering machine, deposit Ni with different element ratios on glassy carbon electrodes (5mm OD×4mm H) x Ru y catalyst. Put the Ni target and the Ru target into the sputtering machine, adjust the power applied to the Ni target between 10 and 200W and the power of the Ru target between 10 and 200W, and pass argon (flow rate is 20sccm) Enter the machine table, and the pressure in the machine table is 20mTorr. Hit the Ni target and the Ru target with argon ions, and perform reactive sputtering at room temperature for 5 to 6 minutes to form a Ni film with a thickness of about 100nm. x Ru y The catalyst is on the glassy carbon electrode, and the coating amount of the catalyst is 0.024mg. Analysis of Ni by EDS x Ru y catalyst, x is between about 0.065 and 0.85, and y is between about 1.935 and 1.15. Analysis of Ni by SEM x Ru y The catalyst has a granular surface morphology. Analysis of Ni by X-ray Diffraction (XRD) x Ru y Catalyst, whi...

preparation example 3

[0046] Using a reactive magnetron sputtering machine, deposit Ni with different element ratios on glassy carbon electrodes (5mm OD×4mm H) x Ru y N 2 catalyst. Put the Ni target and the Ru target into the sputtering machine, adjust the power applied to the Ni target between 10 and 200W and the Ru target between 10 and 200W, and nitrogen and argon (flow rate is 20sccm ) into the machine, nitrogen / (argon+nitrogen)=50%, and the pressure in the machine is 20mTorr. Hit the Ni target and the Ru target with argon ions, and perform reactive sputtering at room temperature for 5 to 6 minutes to form a Ni film with a thickness of about 100nm. x Ru y N 2 The catalyst is on the glassy carbon electrode, and the coating amount of the catalyst is 0.024mg. Analysis of Ni by EDS x Ru y N 2 catalyst, x is between about 0.069 and 1.086, and y is between about 1.931 and 0.914. Analysis of Ni by SEM x Ru y N 2 Catalyst, its surface morphology is triangular pyramid and quadrangular pyram...

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Abstract

The present invention discloses a membrane electrode assembly and a method for hydrogen evolution by electrolysis, the method for hydrogen evolution by electrolysis comprises: immersing the membrane electrode assembly in an alkaline aqueous solution, the membrane electrode assembly comprising: an anode comprising a first catalyst layer on a first gas-liquid diffusion layer; a cathode including a second catalyst layer on the second gas-liquid diffusion layer; and an anion exchange membrane interposed between the first catalyst layer of the anode and the second catalyst layer of the cathode, wherein the chemical structure of the first catalyst layer, the second catalyst layer, or both is MxRuyN2, M is Ni, Co, Fe, Mn, Cr, V, Ti, Cu, or Zn, x is greater than 0 and less than 1.3, y is greater than 0.7 and less than 2, x + y is equal to 2, and MxRuyN2 is a cubic system or an amorphous system; and applying a potential to the anode and the cathode to electrolyze the alkaline aqueous solution,so as to enable the cathode to generate hydrogen and the anode to generate oxygen.

Description

technical field [0001] The invention relates to a membrane electrode group and a method for producing hydrogen by electrolysis using the membrane electrolysis group. Background technique [0002] In today's energy shortage, it is imperative to seek alternative energy, and hydrogen energy is the best alternative energy. Due to the concept of environmental protection, the use of hydrogen as fuel meets environmental protection expectations, and electrolysis of water is the easiest way to produce hydrogen and oxygen. Although the use of electrolyzed water to produce hydrogen has considerable advantages, it has a fatal disadvantage in the process of producing hydrogen in large quantities, that is, it consumes a considerable amount of energy and leads to inconsistent costs. Energy consumption is mostly related to overpotential, and overpotential is related to electrodes, electrolyte, and reaction products. In order to improve the efficiency of water electrolysis, electrodes play...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/10C25B9/10C25B11/06C25B13/02C25B11/02C25B9/23
CPCC25B1/04C25B9/23C25B11/075Y02E60/36
Inventor 林国兴蔡丽端林有铭赵文轩黄秋萍杨秉兴黄筱君林俊男
Owner IND TECH RES INST