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Method for solid phase reaction one-step preparation of reduced graphene oxide/palladium composite nanometer electrocatalyst

A solid-phase reaction, electrocatalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve simple and controllable preparation methods, broad application prospects, process simple effect

Active Publication Date: 2016-05-04
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the preparation of such electrocatalysts is carried out in the liquid phase by chemical reduction, and there is no report on the preparation of Pd / graphene-based composite electrocatalysts by solid-state reactions.

Method used

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  • Method for solid phase reaction one-step preparation of reduced graphene oxide/palladium composite nanometer electrocatalyst
  • Method for solid phase reaction one-step preparation of reduced graphene oxide/palladium composite nanometer electrocatalyst
  • Method for solid phase reaction one-step preparation of reduced graphene oxide/palladium composite nanometer electrocatalyst

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Experimental program
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Embodiment 1

[0020] A method for preparing reduced graphene oxide / palladium composite nano-electrocatalyst in one step by solid phase reaction, the technical scheme is as follows:

[0021] Weigh 0.448g (2mmol) of palladium acetate, 1.056g (6mmol) of ascorbic acid, and 0.015g (1% of the total mass fraction) of graphene oxide powder, mix palladium acetate and graphene oxide fully, add ascorbic acid, and test Mix and grind in a bowl for 1 hour, wash and dry to obtain the reduced graphene oxide / palladium composite nano-electrocatalyst, and its structure and appearance are as follows: figure 1 , figure 2 and image 3 As shown, the electrocatalytic performance of the catalyst for methanol and ethanol is as follows Figure 4 , Figure 5 shown. As a comparison, 0.448 g (2 mmol) of palladium acetate and 1.056 g (6 mmol) of ascorbic acid were weighed, mixed and ground in a mortar at room temperature for 1 hour, washed and dried to obtain a palladium nano-electrocatalyst.

Embodiment 2

[0023] A method for preparing reduced graphene oxide / palladium composite nano-electrocatalyst in one step by solid phase reaction, the technical scheme is as follows:

[0024] Weigh 0.46g (2mmol) of palladium nitrate, 0.704g (4mmol) of ascorbic acid, and 0.061g (5% of the total mass fraction) of graphene oxide powder, mix the palladium nitrate and graphene oxide fully, then add ascorbic acid, and test at room temperature mixing and grinding in a bowl for 20 minutes, washing and drying to obtain the reduced graphene oxide / palladium composite nano-electrocatalyst.

Embodiment 3

[0026] A method for preparing reduced graphene oxide / palladium composite nano-electrocatalyst in one step by solid phase reaction, the technical scheme is as follows:

[0027] Weigh 0.46g (2mmol) of palladium nitrate, 0.303g (8mmol) of sodium borohydride, and 0.085g (10% of the total mass fraction) of graphene oxide powder, mix palladium nitrate and graphene oxide fully, and then add sodium borohydride, Mix and grind in a mortar for 40 minutes at normal temperature, wash and dry to obtain the reduced graphene oxide / palladium composite nanometer electrocatalyst.

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Abstract

The invention provides a method for solid phase reaction one-step preparation of a reduced graphene oxide / palladium composite nanometer electrocatalyst. The method comprises that a metal palladium salt, graphene oxide and a solid reducer as raw materials are subjected to grinding or ball milling so that the raw materials undergo a solid-state chemical reaction to produce the reduced graphene oxide / palladium composite nanometer electrocatalyst through one-step reduction. According to different reaction substances, a reaction temperature is a range of normal temperature to 300 DEG C and reaction time is in a range of 10 minutes to 2 weeks. The method is simple and controllable, utilizes cheap and easily available raw materials, realizes large-scale preparation under eco-friendly conditions and can be industrialized easily. The reduced graphene oxide / palladium composite nanometer electrocatalyst has good effects of electrocatalysis of methanol and ethanol electrochemical oxidation and has a wide application prospect in the field of fuel cell electrocatalysis.

Description

technical field [0001] The invention belongs to the field of nano catalyst preparation technology and electrochemical energy technology, in particular to a method for preparing reduced graphene oxide / palladium composite nano electrocatalyst in one step by solid phase reaction. Background technique [0002] Direct methanol fuel cells (DAMCs) have the characteristics of low-temperature quick start, clean and environmentally friendly fuel, high energy density, and simple battery structure. They are one of the new power sources suitable for portable mobile power sources and electric vehicles. Broad prospects. However, the commonly used anode catalysts Pt and Pt-based catalysts have limited the large-scale application of DAFCs due to their low catalytic activity and high price. In recent years, Pd and Pd-based catalysts with excellent electrocatalytic activity have attracted widespread attention, and a large number of literatures have reported the electrocatalytic oxidation of m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92B01J23/44B82Y30/00
CPCB82Y30/00H01M4/921H01M4/926Y02E60/50
Inventor 张爱勤肖元化陈俊利李峰巩飞龙
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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