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Anode catalyst for water electrolysis hydrogen production by taking transition metal doped titanium oxide as a carrier and preparation method of anode catalyst

A transition metal and precious metal oxide technology, applied in the field of electrocatalysis, can solve the problem of high cost of membrane electrodes, achieve the effects of small size, improve dispersion and surface active site density, and excellent performance

Active Publication Date: 2020-06-12
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the oxygen evolution reaction process in an acidic system, the catalysts are mainly noble metals Ir and Ru, which makes the cost of membrane electrodes too high, so reducing the amount of noble metals is still one of the main challenges in the commercialization process

Method used

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  • Anode catalyst for water electrolysis hydrogen production by taking transition metal doped titanium oxide as a carrier and preparation method of anode catalyst
  • Anode catalyst for water electrolysis hydrogen production by taking transition metal doped titanium oxide as a carrier and preparation method of anode catalyst
  • Anode catalyst for water electrolysis hydrogen production by taking transition metal doped titanium oxide as a carrier and preparation method of anode catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Preparation of transition metal-doped titania-supported noble metal oxide catalyst

[0031] (1) Take 0.19g of tungsten hexachloride, 0.54g of oxalic acid, and 1mL of titanium tetrachloride and mix ethanol and water under magnetic stirring conditions, wherein the molar ratio of W / (Ti+W) is 5%. It was continuously stirred until uniformly mixed, and then ultrasonically treated for 1 h to form a mixed solution.

[0032] (2) Transfer the mixed solution obtained in step (1) to a petri dish, and heat-treat it at 80° C. until solid particles are formed. Subsequently, it was placed in a drying oven at 80° C. for 12 hours for further drying.

[0033] (3) the particles obtained in step (2) in H 2 The tungsten-doped titanium oxide was obtained by calcining under atmosphere, wherein the heating rate was 5°C / min, the calcining temperature was 500°C, and the calcining time was 1h.

[0034] (4) Weigh 30 mg of the tungsten-doped titanium oxide obtained in step (3) and add ...

Embodiment 2

[0039] The operation steps of Example 1 were repeated, except that the added amount of tungsten hexachloride was changed so that the molar ratio of W / (Ti+W) was 10%, and the volume of titanium tetrachloride was maintained at 1 mL. The obtained catalyst is abbreviated as 20%IrOx / 10%W-TiO 2 .

Embodiment 3

[0041] The operation steps of Example 1 were repeated, except that the added amount of tungsten hexachloride was changed so that the molar ratio of W / (Ti+W) was 20%, and the volume of titanium tetrachloride was maintained at 1 mL. The obtained catalyst is abbreviated as 20%IrOx / 20%W-TiO 2 .

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Abstract

The invention discloses an anode catalyst for water electrolysis hydrogen production by taking transition metal doped titanium oxide as a carrier and a preparation method and application of the anodecatalyst. Stable, conductive and high-specific-surface-area porous transition metal doped titanium oxide is selected as a carrier of precious metal oxide nanoparticles. The catalyst prepared by combining the nanocrystallized noble metal material can greatly improve the dispersity of active noble metal and the density of surface active sites so that the utilization rate and the mass specific activity of the precious metal are improved, and the oxygen evolution mass specific activity can reach 7-8 times of that of commercial iridium oxide while the loading capacity of the precious metal in the membrane electrode of the water electrolyzer is reduced.

Description

Technical field: [0001] The invention relates to the technical field of electrocatalysis, in particular to an anode catalyst for water electrolysis hydrogen production with transition metal-doped titanium oxide as a carrier, a preparation method and application thereof. Background technique: [0002] To reduce the use of fossil energy, reduce CO 2 Emissions, renewable energy such as wind energy and solar energy must be utilized, but many renewable energy sources are intermittent energy, so energy storage technology must also be developed while renewable energy is developing. Water electrolysis technology can convert the electrical energy generated by intermittent renewable energy into hydrogen energy and store it, which is a clean way of hydrogen production. The energy loss in the water electrolysis process mainly comes from the overpotential of the oxygen evolution reaction, and a highly active oxygen evolution catalyst is the key to reducing energy consumption. In the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/652B01J37/03B01J37/10C25B1/04C25B11/06
CPCB01J23/6527B01J23/002B01J37/036B01J37/10C25B1/04C25B11/095C25B11/093B01J35/393B01J35/399B01J35/23B01J35/33Y02E60/36Y02P20/133
Inventor 闫常峰闵祥萍史言卢卓信郭常青王志达谭弘毅
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI