Tungsten telluride-tungsten boride heterojunction electrocatalyst and preparation method and application thereof

An electrocatalyst, tungsten boride technology, applied in the field of electrocatalytic materials, can solve the problems of limited commercial application, low stability, low reserves, etc., and achieve the effects of optimizing local electronic structure, highly stable hydrogen evolution performance, and low preparation cost.

Active Publication Date: 2020-07-24
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The noble metal Pt-based catalyst has excellent electrocatalytic hydrogen production performance in the whole pH value range, but its high cost, low storage and low stability limit its commercial application. Water-splitting electrocatalysts have important practical implications for global energy sustainability

Method used

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  • Tungsten telluride-tungsten boride heterojunction electrocatalyst and preparation method and application thereof
  • Tungsten telluride-tungsten boride heterojunction electrocatalyst and preparation method and application thereof
  • Tungsten telluride-tungsten boride heterojunction electrocatalyst and preparation method and application thereof

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Experimental program
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Embodiment 1

[0041]A tungsten telluride-tungsten boride heterojunction electrocatalyst in this embodiment, the catalyst uses anodized tungsten foil as a template and a tungsten source, respectively uses tellurium powder as a tellurium source, boron-oxygen mixture powder As a solid boron source, a two-phase heterojunction nanoporous film of tungsten telluride and tungsten boride is prepared by two-step chemical vapor deposition successively. The nanoporous film has the characteristics of loose and porous materials. The boron-oxygen mixture powder is a mixture powder composed of amorphous boron powder and diboron trioxide powder according to a material ratio of 1:1.

[0042] The preparation method of the tungsten telluride-tungsten boride heterojunction electrocatalyst is as follows:

[0043] (1) The metal tungsten foil with a surface area of ​​1 square centimeter was ultrasonically cleaned with acetone, absolute ethanol and deionized water for 30 minutes to remove surface organic matter and...

Embodiment 2

[0048] A tungsten telluride-tungsten boride heterojunction electrocatalyst in this embodiment, the catalyst uses anodized tungsten foil as a template and a tungsten source, respectively uses tellurium powder as a tellurium source, boron-oxygen mixture powder As a solid boron source, a two-phase heterojunction nanoporous film of tungsten telluride and tungsten boride is prepared by two-step chemical vapor deposition successively. The nanoporous film has the characteristics of loose and porous materials. The boron-oxygen mixture powder is a mixture powder composed of amorphous boron powder and diboron trioxide powder according to a material ratio of 1:1.

[0049] The preparation method of the tungsten telluride-tungsten boride heterojunction electrocatalyst is as follows:

[0050] (1) The metal tungsten foil with a surface area of ​​1 square centimeter was ultrasonically cleaned with acetone, absolute ethanol and deionized water for 45 minutes to remove surface organic matter an...

Embodiment 3

[0055] A tungsten telluride-tungsten boride heterojunction electrocatalyst in this embodiment, the catalyst uses anodized tungsten foil as a template and a tungsten source, respectively uses tellurium powder as a tellurium source, boron-oxygen mixture powder As a solid boron source, a two-phase heterojunction nanoporous film of tungsten telluride and tungsten boride is prepared by two-step chemical vapor deposition successively. The nanoporous film has the characteristics of loose and porous materials. The boron-oxygen mixture powder is a mixture powder composed of amorphous boron powder and diboron trioxide powder according to a material ratio of 1:1.

[0056] The preparation method of the tungsten telluride-tungsten boride heterojunction electrocatalyst is as follows:

[0057] (1) The metal tungsten foil with a surface area of ​​1 square centimeter was ultrasonically cleaned with acetone, absolute ethanol and deionized water for 30 minutes to remove surface organic matter an...

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Abstract

The invention relates to a tungsten telluride-tungsten boride heterojunction electrocatalyst and a preparation method and application thereof, and aims to provide a porous tungsten telluride and tungsten boride heterojunction porous thin film material as a novel electrocatalyst so as to obtain stronger moisture desorption hydrogen electrocatalytic performance. The technical scheme is as follows: the method comprises the following steps that: the tungsten telluride-tungsten boride heterojunction electrocatalyst is a tungsten telluride and tungsten boride two-phase heterojunction nano-porous film which is prepared by taking an anodized tungsten foil as a template and a tungsten source, tellurium powder is taken as a tellurium source and boron-oxygen mixture powder is taken as a solid boron source through adoption a two-step chemical vapor deposition method in sequence. The tungsten telluride-tungsten boride heterojunction electrocatalyst has the excellent hydrogen evolution electrochemical reduction performance, electrons in tungsten telluride are transferred to tungsten boride through the heterostructure, the local electronic structure of the tungsten telluride and tungsten boride interface is optimized, the hydrogen adsorption energy of the tungsten telluride-tungsten boride heterojunction electrocatalyst is improved, the catalytic activity of the tungsten telluride-tungsten boride heterojunction electrocatalyst is enhanced, and the hydrogen evolution performance is highly stable.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic materials, and in particular relates to a tungsten telluride-tungsten boride heterojunction electrocatalyst and a preparation method and application thereof. Background technique [0002] In view of the fact that clean and environmentally friendly hydrogen energy can be used as an alternative energy source for traditional fossil fuels, hydrogen production from water electrolysis using renewable energy as kinetic energy (such as solar energy and wind energy) has become a research hotspot in recent years. The noble metal Pt-based catalyst has excellent electrocatalytic hydrogen production performance in the whole pH value range, but its high cost, low storage and low stability limit its commercial application. Electrocatalysts for water splitting are of great practical significance to the sustainable development of global energy. At present, the new hydrogen evolution electrocatalysts that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057B01J35/10C25B11/06C25B1/04
CPCB01J27/0576B01J35/0033B01J35/10C25B11/04C25B1/04Y02E60/36
Inventor 范修军刘辉李思殿
Owner SHANXI UNIV
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