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A metal-doped W18O49 electrocatalyst with multiple morphologies and its application in water electrolysis for hydrogen production

A W18O49, metal doping technology, applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, electrolytic components, etc., can solve the problems of low catalytic activity, high cost, and poor stability of hydrogen evolution catalysts , to achieve the effect of good catalytic hydrogen evolution performance, good conductivity and high stability

Inactive Publication Date: 2019-06-28
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a metal-doped W 18 o 49 Electrocatalyst and its application in hydrogen production by electrolysis of water

Method used

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  • A metal-doped W18O49 electrocatalyst with multiple morphologies and its application in water electrolysis for hydrogen production
  • A metal-doped W18O49 electrocatalyst with multiple morphologies and its application in water electrolysis for hydrogen production
  • A metal-doped W18O49 electrocatalyst with multiple morphologies and its application in water electrolysis for hydrogen production

Examples

Experimental program
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Effect test

Embodiment 1

[0032] One, W described in the present invention 18 o 49 The preparation method of NFs electrocatalyst specifically comprises the following steps:

[0033] 1. Mix 0.1 g WCl 6Dissolve in 50 mL of absolute ethanol to form a yellow clear liquid with a mass volume ratio of 2 mg / mL;

[0034] 2. Transfer the yellow clear liquid to a 60 mL stainless steel reaction kettle lined with polytetrafluoroethylene, and then seal it;

[0035] 3. Heat the reaction kettle in an oven at 180°C for 24 h, then cool it down to room temperature naturally;

[0036] 4. The product obtained after centrifuging the obtained reaction solution was washed with distilled water and absolute ethanol for 3 times each;

[0037] 5. Dry the washed product in a vacuum oven at 45°C for 12 h to obtain W 18 o 49 NFs electrocatalyst.

[0038] Two, W 18 o 49 Characterization of physical properties of NFs

[0039] Test the W prepared by the above steps respectively 18 o 49 XRD and SEM of NFs, the test resul...

Embodiment 2

[0053] One, the present invention W 18 o 49 The preparation method of NFBs electrocatalyst specifically comprises the following steps:

[0054] 1. Mix 0.17 g WCl 6 Dissolve in 50 mL of absolute ethanol to form a yellow clear liquid with a mass volume ratio of 3.4 mg / mL;

[0055] 2. Transfer the yellow clear liquid to a 60 mL stainless steel reaction kettle lined with polytetrafluoroethylene, and then seal it;

[0056] 3. Heat the reaction kettle in an oven at 180°C for 24 h, then cool it down to room temperature naturally;

[0057] 4. The product obtained after centrifuging the obtained reaction solution was washed with distilled water and absolute ethanol for 3 times each;

[0058] 5. Dry the washed product in a vacuum oven at 45°C for 12 h to obtain W 18 o 49 NFBs electrocatalyst.

[0059] Two, W 18 o 49 Characterization of physical properties of NFBs

[0060] Test the W prepared by the above steps 18 o 49 SEM of NFBs electrocatalyst, the test results are as ...

Embodiment 3

[0067] One, the present invention W 18 o 49 The preparation method of HSs electrocatalyst specifically comprises the following steps:

[0068] 1. Mix 0.5 g WCl 6 Dissolve in 50 mL of absolute ethanol to form a yellow clear liquid with a mass volume ratio of 10 mg / mL;

[0069] 2. Transfer the yellow clear liquid to a 60 mL stainless steel reaction kettle lined with polytetrafluoroethylene, and then seal it;

[0070] 3. Heat the reaction kettle in an oven at 180°C for 24 h, then cool it down to room temperature naturally;

[0071] 4. The product obtained after centrifuging the obtained reaction solution was washed with distilled water and absolute ethanol for 3 times each;

[0072] 5. Dry the washed product in a vacuum oven at 45°C for 12 h to obtain W 18 o49 HSs electrocatalyst.

[0073] Two, W 18 o 49 Characterization of physical properties of HSs

[0074] Test the W prepared by the above steps 18 o 49 SEM of HSs electrocatalyst, the test results are as follows ...

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Abstract

The invention provides a metal-doped W with multiple morphologies 18 O 49 Electrocatalysts and their application in electrolysis of water for hydrogen production, specifically the use of W 18 O 49 Preferential growth characteristics in specific crystallographic directions and preparation of W by solvothermal method 18 O 49 The catalyst can obtain three morphologies of nanofibers, nanofiber bundles and microspheres composed of nanofibers by changing the concentration of the precursor solution, and its electrocatalytic performance can be improved by incorporating elements such as palladium and molybdenum. The present invention makes full use of W 18 O 49 The one-dimensional nanofiber structure promotes electron transport, and a large number of oxygen vacancies in the catalyst provide H + Reduction produces H 2 Provides sufficient active sites; in addition, solid W 18 O 49 Nanofibers can fully contact the liquid electrolyte, which is beneficial to H + Diffusion in the three-dimensional network composed of nanofibers, thereby improving its catalytic performance. The multi-morphology electrocatalyst of the present invention has high electrocatalytic activity, good stability, simple and easy preparation method and low cost.

Description

technical field [0001] The invention belongs to the technical field of hydrogen production by electrolysis of water, in particular to a metal-doped W 18 o 49 Electrocatalysts and their use in electrolysis of water for hydrogen production. Background technique [0002] At present, although traditional energy sources such as coal, oil, and natural gas still occupy an important position in economic development, due to their limited reserves, finding one or several alternative new energy sources has become an important problem that mankind needs to solve urgently. Among many new energy sources, hydrogen is an abundant, renewable and clean fuel, and electrolysis of water is the simplest method for large-scale hydrogen production, but high-efficiency hydrogen evolution electrocatalysts are needed. At present, Pt is the best hydrogen evolution catalyst, but it is too expensive to be used on a large scale. In order to meet the needs of industrial production, the cathode must not ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/652B01J23/30B01J35/06B01J35/08B01J35/10C25B1/04C25B11/06
CPCC25B1/04C25B11/04B01J23/30B01J23/6527B01J35/58B01J35/51B01J35/613B01J35/615Y02E60/36
Inventor 唐群委赵媛媛贺本林
Owner OCEAN UNIV OF CHINA
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