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Alpha-NixFey(OH)2 electrocatalyst and application of alpha-NixFey(OH)2 electrocatalyst to working electrode

An electrocatalyst, a certain amount of technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, electrode, etc., can solve the cumbersome preparation method, unfavorable research and application of nickel-based hydroxide, etc. question

Inactive Publication Date: 2019-10-25
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Today, transition metal porous nanosheets have been prepared using tedious and harsh etching procedures such as etch-intralayer Ostwald ripening route or plasma etching, but these preparation methods are usually cumbersome and not conducive to nickel-based hydroxides. research and application

Method used

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  • Alpha-NixFey(OH)2 electrocatalyst and application of alpha-NixFey(OH)2 electrocatalyst to working electrode
  • Alpha-NixFey(OH)2 electrocatalyst and application of alpha-NixFey(OH)2 electrocatalyst to working electrode
  • Alpha-NixFey(OH)2 electrocatalyst and application of alpha-NixFey(OH)2 electrocatalyst to working electrode

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preparation example Construction

[0025] a-Ni x Fe y (OH) 2 The preparation method of electrocatalyst comprises the following steps:

[0026] First prepare solution A, add a certain amount of nickel nitrate hexahydrate, iron nitrate nonahydrate and cetyltrimethylammonium bromide into ultrapure water or deionized water; then prepare solution B, add a certain amount of NaBH 4 Add to ultrapure water or deionized water; stir solution A continuously until the solute is completely dissolved, then add solution B dropwise to solution A, after the reaction, centrifuge the product, wash it with water and absolute ethanol several times, and then vacuum dry , to produce α-Ni x Fe y (OH) 2 .

[0027] α-Ni synthesized in the present invention x Fe y (OH) 2 With nanometer-sized pores and uniform pores, this structure makes the α-Ni x Fe y (OH) 2 When used as a catalytic electrode material, it not only has a large specific surface area, but also has a good mass transfer effect and a large number of active sites, w...

Embodiment

[0033] One using NaBH 4 Rapid preparation of iron-doped α-Ni as "foaming agent" and coprecipitant x Fe y (OH) 2 The method and its OER performance comprise the following steps:

[0034] (1), α-Ni x Fe y (OH) 2 preparation of

[0035] First prepare solution A, a certain amount of nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O), ferric nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O) and 0.5 g of cetyltrimethylammonium bromide (CTAB) were added to 25 mL of ultrapure water or deionized water, where Fe(NO 3 ) 3 9H 2 O and Ni(NO 3 ) 2 ·6H 2 The molar amount of O is 2 mmol, and y / x is 0 / 1, 1 / 9, 1 / 5, 1 / 3, 1 / 2, 1 / 1. Then prepare solution B, 0.1 g NaBH 4 Add to 25 mL ultrapure or deionized water. Solution A was continuously stirred for a certain period of time to completely dissolve the solute, then solution B was added dropwise to solution A, and after 5 min of reaction, the product was centrifuged, washed with water and absolute ethanol several times, and then vacuum-dri...

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Abstract

The invention relates to the field of novel two-dimensional material preparation, in particular to a preparation method of an alpha-NixFey(OH)2 electrocatalyst and application of the alpha-NixFey(OH)2electrocatalyst to a working electrode. According to the method for rapidly preparing an iron-doped alpha phase nickel hydroxide porous nanosheet (alpha-NixFey(OH)2) material by using sodium borohydride as a foaming agent and a coprecipitator, the working electrode is prepared from an iron-doped alpha phase nickel hydroxide porous nanosheet, and the working electrode has the excellent oxygen evolution performance. Thus, by using NaBH4 as the foaming agent and the coprecipitator, the iron-doped alpha phase nickel hydroxide porous nanosheet material (alpha-NixFey(OH)2) is rapidly prepared, andthe excellent OER performance is achieved; and improvement of the catalytic activity can be attributed to the strong electron interaction between Ni and Fe and the porous structure.

Description

technical field [0001] The invention relates to the field of preparation of novel two-dimensional materials, specifically, the rapid preparation of iron-doped α-phase nickel hydroxide porous nanosheets (α-Ni x Fe y (OH) 2 ) material method, and the iron-doped α-phase nickel hydroxide porous nanosheets are used to prepare the working electrode, which has excellent oxygen evolution performance. Background technique [0002] In recent years, with the aggravation of energy crisis and environmental degradation, people are motivated to seek clean and sustainable power generation technologies and the production of energy carriers such as hydrogen and oxygen. Water electrolysis is well known as a simple method to generate high-purity hydrogen by electrochemically splitting water into hydrogen and oxygen. Due to the poor kinetics of the anodic oxygen evolution reaction (OER), which involves a complex four-electron process, noble metals such as oxides of Ir or Ru have excellent cat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J35/10B01J35/02C25B1/04C25B11/06B01J35/00
CPCB01J23/755C25B1/04C25B11/075B01J35/33B01J35/00B01J35/30B01J35/647B01J35/615Y02E60/36
Inventor 郭俊杰宋艳慧宋美秀裴林媛许并社
Owner TAIYUAN UNIV OF TECH
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