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Self-supporting Ni-doped WP2 nanosheet array electrocatalyst and preparation method thereof

A nanosheet array and electrocatalyst technology, which is applied in the field of electrocatalysis and hydrogen evolution electrode materials, can solve the problem of insufficient electrocatalytic hydrogen evolution performance of nanosheets, achieve high electrocatalytic hydrogen evolution activity and stability, easy control of reaction conditions, and low cost low effect

Active Publication Date: 2020-08-14
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The first object of the present invention is to provide a self-supporting Ni-doped WP 2 Nanosheet array electrocatalyst preparation method to solve existing WP 2 The problem that the electrocatalytic hydrogen evolution performance of nanosheets is not excellent enough

Method used

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  • Self-supporting Ni-doped WP2 nanosheet array electrocatalyst and preparation method thereof
  • Self-supporting Ni-doped WP2 nanosheet array electrocatalyst and preparation method thereof
  • Self-supporting Ni-doped WP2 nanosheet array electrocatalyst and preparation method thereof

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Embodiment 1

[0032] A self-supporting Ni-doped WP 2 A method for preparing a nanosheet array electrocatalyst, comprising the following steps:

[0033] (1) Firstly, the cut commercial carbon cloth (1cm×3cm) is treated with nitric acid to make it hydrophilic, and then ultrasonically cleaned in acetone, deionized water and ethanol for 20min; weigh 40ml of ethanol and put it in 100mL of polytetrafluoroethylene Add 0.6g H to the reaction kettle at the same time 2 C 2 o 4 (oxalic acid) to dissolve it. Then weigh 0.3g WCl in the glove box 6 Pour (tungsten hexachloride) into the mixed solution; place the pretreated carbon cloth vertically in the configured reaction kettle for solvothermal reaction at 180°C for 10 hours, and wash the surface of the substrate with ethanol after the reaction kettle is naturally cooled. After rinsing, dry in a 60°C oven. The dried samples were heated to 450 °C in a muffle furnace at a heating rate of 2 °C / min and sintered for 2 h to obtain WO 3 Nanosheet arrays...

Embodiment 2

[0036] A self-supporting Ni-doped WP 2 A method for preparing a nanosheet array electrocatalyst, comprising the following steps:

[0037] (1) Firstly, the cut carbon cloth (1cm×3cm) is treated with nitric acid to make it hydrophilic, and then ultrasonically cleaned in acetone, deionized water and ethanol for 20 minutes; weigh 40ml of ethanol and place it in 100mL of polytetrafluoroethylene for reaction Add 0.6g H to the kettle at the same time 2 C 2 o 4 (oxalic acid) to dissolve it. Then add NiCl with a W:Ni molar ratio of 1% 2 ·6H 2 O (nickel chloride hexahydrate) solution, then weigh 0.3g WCl in the glove box 6Pour (tungsten hexachloride) into the mixed solution; place the pretreated carbon cloth vertically in the configured reaction kettle for solvothermal reaction at 180°C for 10 hours, and wash the surface of the substrate with ethanol after the reaction kettle is naturally cooled. After rinsing, dry in a 60°C oven. The dried samples were heated in a muffle furnac...

Embodiment 3

[0040] A self-supporting Ni-doped WP 2 A method for preparing a nanosheet array electrocatalyst, comprising the following steps:

[0041] (1) Firstly, the cut carbon cloth (1cm×3cm) is treated with nitric acid to make it hydrophilic, and then ultrasonically cleaned in acetone, deionized water and ethanol for 20 minutes; weigh 40ml of ethanol and place it in 100mL of polytetrafluoroethylene for reaction Add 0.4g H to the kettle at the same time 2 C 2 o 4 (oxalic acid) to dissolve it. Then add NiCl with a W:Ni molar ratio of 5% concentration 2 ·6H 2 O (nickel chloride hexahydrate) solution, and weigh 0.2g WCl in the glove box 6 Pour (tungsten hexachloride) into the mixed solution; place the pretreated carbon cloth vertically in the configured reaction kettle for solvothermal reaction at 160°C for 10 hours, and wash the surface of the substrate with ethanol after the reaction kettle is naturally cooled. After rinsing, dry in a 60°C oven. The dried samples were heated to 5...

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Abstract

The invention provides a preparation method of a self-supporting Ni-doped WP2 nanosheet array electrocatalyst. The preparation method comprises the following steps: (1) putting a conductive substratematerial into a polytetrafluoroethylene reaction kettle containing a mixed solution of ethanol, oxalic acid, tungsten hexachloride and nickel chloride, carrying out solvothermal reaction at 100-220 DEG C for 6-12 hours, and sintering in a muffle furnace to obtain a Ni-doped WO3 nanosheet array; (2) taking sodium hypophosphite as a phosphorus source, using an in-situ phosphating reduction method ina double-temperature-control vacuum atmosphere tube furnace, performing phosphating reduction on the nickel-doped tungsten trioxide nanosheet array on the conductive substrate material under the argon environment to form a nickel-doped tungsten diphosphide nanosheet array, and obtaining the Ni-doped WP2 nanosheet array electro-catalytic hydrogen evolution electrode material. The self-supporting Ni-doped WP2 nanosheet array electro-catalytic hydrogen evolution electrode material prepared by the method has relatively high electro-catalytic hydrogen evolution activity and stability.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysis and hydrogen evolution electrode materials, in particular to a self-supporting Ni-doped WP 2 Nanosheet array electrocatalysts, also involving the self-supporting Ni-doped WP 2 Nanosheet array electrocatalyst preparation method. Background technique [0002] Hydrogen, as a clean, renewable and high-combustion energy source, is the most promising candidate to replace fossil fuels. Among many hydrogen production technologies, electrocatalytic hydrogen production is a simple and effective method. Notably, Pt-based noble metal catalysts have been favored in initial studies of electrocatalytic hydrogen evolution reaction (HER) due to their low initial hydrogen evolution potential and excellent catalytic performance. However, as a noble metal, the scarcity and high price of raw materials limit its application in the field of electrocatalytic hydrogen production. [0003] Tungsten phosphide h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/188B01J35/10B01J37/16B01J37/28B01J37/08C25B11/06C25B1/04
CPCB01J27/188B01J37/16B01J37/28B01J37/08C25B1/04C25B11/051C25B11/091B01J35/33B01J35/60B01J35/40Y02E60/36
Inventor 刘勇平刘威吕慧丹耿鹏庄杨肖智中
Owner GUILIN UNIVERSITY OF TECHNOLOGY