Heteroatom doped hollow carbon sphere material loaded precious metal nano particle and preparation thereof

A nanoparticle and heteroatom technology, applied in the field of fuel cell anode catalyst materials, can solve the problems of high price, limited reserves of precious metals, poisoning of intermediate products, etc., and achieve the effect of simple and clear preparation process and high practical value
CN106006549AActive Publication Date: 2016-10-12SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI UNIVERSITY OF ELECTRIC POWER
Publication Date
2016-10-12

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Abstract

The invention relates to a heteroatom doped hollow carbon sphere material loaded precious metal nano particle and preparation thereof. The preparation comprises the following steps that firstly, heteroatom doped hollow carbon spheres are prepared, wherein 1-1, silicon dioxide serves as a template, comonomer phosphonitrilic chloride trimer and 4,4-dyhydroxyl bi-phenol are added, a polymerization reaction is carried out, and polyphosphazene wrapping silicon dioxide is generated; 1-2, the polyphosphazene wrapping silicon dioxide is calcined, and heteroatom doped carbon spheres with silicon dioxide as cores are obtained; 1-3, ultrasonic etching continues to be carried out, and after washing and drying, the heteroatom doped hollow carbon spheres are obtained; secondly, the prepared heteroatom doped hollow carbon spheres are dispersed into water, a precious metal precursor and a complexing agent are added, pH is adjusted to be 8-14, a reducing agent is added, stirring is carried out for a reaction, and after drying, the target product is obtained. Compared with the prior art, the catalyst has good electrocatalytic activity and electrochemical stability, and the preparation process is simple.
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Description

technical field

[0001] The invention relates to the field of fuel cell anode catalyst materials, in particular to a heteroatom-doped hollow carbon sphere material loaded with noble metal nanoparticles and a preparation method thereof. Background technique

[0002] Due to the depletion of global fossil energy resources and the aggravation of environmental pollution, it is urgent for people to find clean and efficient new environmentally friendly energy sources. Among them, fuel cells are used in various fields due to their high energy density and wide range of fuel sources. The key to the energy conversion efficiency of fuel cells is the catalyst. The electrocatalysts of direct alcohol fuel cells are dominated by noble metals, but the reserves of noble metals in nature are limited and expensive, and they are easily poisoned by intermediate products. Therefore, noble metals need to be compounded with carbon materials. Among them, hollow carbon materials have large specific su...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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