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A kind of nano flake ni (oh) Catalyst and its preparation method and application

A nanosheet-like, catalyst technology

Inactive Publication Date: 2018-09-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high solubility of nickel oxides in commonly used anodizing electrolytes, it is difficult to control the structure and morphology of the prepared film, and usually only severe localized Dissolution or electropolishing phenomenon
Therefore, so far, there is no research report on the preparation of nickel-based thin film catalysts by anodic oxidation.

Method used

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  • A kind of nano flake ni (oh) Catalyst and its preparation method and application
  • A kind of nano flake ni (oh) Catalyst and its preparation method and application
  • A kind of nano flake ni (oh) Catalyst and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The nano flake Ni(OH) of this implementation 2 The preparation method of catalyst comprises the following steps:

[0043] (1) Use a pure nickel sheet with a thickness of 0.2mm and a purity of 96.6% as the base metal, cut it into a rectangle of 3.5cm × 0.5cm, and the upper part with a length of 1.5cm is the clamping part, which is used to connect with the Connection, the lower part with a length of 2cm is the actual use part, which is immersed in the electrolyte to participate in the anodic oxidation reaction.

[0044] (2) Use acetone and alcohol to remove the oil stain and oxide layer on the surface of the nickel sheet in an ultrasonic environment. The amount of acetone and alcohol is just enough to cover the nickel sheet sample. First, ultrasonically clean it in the acetone solution for 10 minutes, and then put it in the alcohol solution. Ultrasonic cleaning for 10 minutes; after ultrasonic degreasing, rinse with deionized water and dry.

[0045] (3) Add 1mol L to th...

Embodiment 2

[0077] The nano flake Ni(OH) of this implementation 2 The preparation method of catalyst comprises the following steps:

[0078] (1) Use nickel foam with a thickness of 0.5mm and a purity of 96.6% as the base metal, cut it into a rectangle of 3.5cm × 0.5cm, and the upper part with a length of 1.5cm is the clamping part, which is used to connect with the fixture , the lower part with a length of 2cm is the actual use part, which is immersed in the electrolyte to participate in the anodic oxidation reaction.

[0079] (2) Use acetone and alcohol to remove the oil stain and oxide layer on the surface of the nickel foam in an ultrasonic environment. The amount of acetone and alcohol is just enough to cover the nickel sheet sample. First, ultrasonically clean it in the acetone solution for 10 minutes, and then put it in the alcohol solution. Ultrasonic cleaning for 10 minutes; after ultrasonic degreasing, rinse with deionized water and dry.

[0080] (3) Add 0.5mol L to the contain...

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Abstract

The invention discloses a nano sheet-shaped Ni(OH)<2> catalyst and a preparation method therefor and an application thereof. The invention discloses the preparation method for the nano sheet-shaped Ni(OH)<2> catalyst; the preparation method comprises the steps of (1) immersing a pure nickel substrate into an electrolyte, wherein the electrolyte comprises 0.2-3mol L<-1> of F<->, 0.1-1mol L<-1> of NH<4+>, 2-7mol L<-1> of ethylene glycol, 5-10mol L<-1> of glycerol, 0.1-0.5mol L<-1> of Na<2>WO<4>.2H<2>O; (2) performing constant-current positive electrode oxidization preparation; and (3) performing hydrothermal treatment on the sample processed in the step (2), and then cleaning and drying to obtain the nano sheet-shaped Ni(OH)<2> catalyst. The invention also discloses the nano sheet-shaped Ni(OH)<2> catalyst prepared by the preparation method, and the application of the catalyst. The nano catalyst prepared by the invention has relatively high electrocatalytic activity, high cycling stability, high CO poisoning resistance, a simple preparation process, high efficiency and a low cost.

Description

technical field [0001] The invention relates to the fields of electrocatalysis and fuel cells, in particular to a nanosheet Ni(OH) 2 Catalyst and its preparation method and application. Background technique [0002] In recent years, direct methanol fuel cells (DMFCs) have received extensive research and attention due to their advantages such as low operating temperature, high energy utilization efficiency, convenient fuel storage, and low pollutant emissions. However, the commercial application of acidic DMFCs based on platinum-based catalysts is facing some critical issues, such as slow oxidation kinetics, methanol permeation, high catalyst cost, and oversensitivity to toxic CO intermediates, etc. In contrast, alkaline DMFCs are attracting increasing attention due to their enhanced reaction kinetics and less pollutant emissions, as well as a wide range of electrode material choices. Non-noble metals and cheap metals can be used as catalysts in alkaline DMFC, among which n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90
CPCH01M4/90Y02E60/50
Inventor 张果戈王洛源李文芳
Owner SOUTH CHINA UNIV OF TECH
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