PtM/C electrocatalyst for fuel cell and preparation method of PtM/C electrocatalyst for fuel cell

An electrocatalyst and fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of not too high a loading capacity, poor particle size distribution uniformity, long preparation period of colloid method, etc., and achieve good oxygen reduction The effect of reaction catalytic performance, good thermal stability and small particle size

Inactive Publication Date: 2014-12-17
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to be suitable for commercial mass production, the preparation method of PtM/C catalyst needs to be improved. In the past, the preparation method of PtM/C catalyst was mostly prepared by impregnation method, liquid phase reduction method and colloid method. However, these methods have different degrees of limitations. technical flaw
For example, the liquid-phase reduction method generally uses a reducing agent to reduce the active component of the catalyst at a certain

Method used

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  • PtM/C electrocatalyst for fuel cell and preparation method of PtM/C electrocatalyst for fuel cell
  • PtM/C electrocatalyst for fuel cell and preparation method of PtM/C electrocatalyst for fuel cell
  • PtM/C electrocatalyst for fuel cell and preparation method of PtM/C electrocatalyst for fuel cell

Examples

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Embodiment 1

[0033] In this example, Pt was prepared by pulsed microwave assisted chemical reduction 3 Ni / XC-72 electrocatalyst (Pt to Ni molar ratio 3:1, Pt 3 The percentage of Ni accounting for the total mass of the catalyst is 20%, then the percentage of Pt accounting for the total mass of the catalyst is 18.18%, and the percentage of Ni accounting for the total mass of the catalyst is 1.82%). The specific preparation method is as follows:

[0034] (1) According to the mass ratio of Vulcan XC-72 carbon black (Cabot, USA) to ethylene glycol is 1:200, add Vulcan XC-72 to ethylene glycol, and stir evenly with ultrasonic to prepare suspension A;

[0035] (2) by the mol ratio of Ni in nickel nitrate and Pt in chloroplatinic acid is 1: 3, chloroplatinic acid and nickel nitrate are joined in the suspension A that step (1) makes together, wherein, chloroplatinic acid and The mass ratio of Vulcan XC-72 is controlled to be 1:1.66, the ultrasonic stirring is uniform, the pH value of the solution ...

Embodiment 2

[0041] In this example, Pt was prepared by pulsed microwave assisted chemical reduction 3 Ni / acetylene black electrocatalyst (Pt to Ni molar ratio 3:1, Pt 3 The percentage of Ni accounting for the total mass of the catalyst is 20%, then the percentage of Pt accounting for the total mass of the catalyst is 18.18%, and the percentage of Ni accounting for the total mass of the catalyst is 1.82%). The specific preparation method is as follows:

[0042] (1) According to the mass ratio of acetylene black (Alfa, USA) to ethylene glycol is 1: 200, acetylene black is added to ethylene glycol, and ultrasonically stirred evenly to obtain suspension A;

[0043](2) by the mol ratio of Ni in nickel nitrate and Pt in chloroplatinic acid is 1: 3, chloroplatinic acid and nickel nitrate are joined in the suspension A that step (1) makes together, wherein, chloroplatinic acid and The mass ratio of acetylene black is controlled to be 1:1.66, the ultrasonic stirring is uniform, the pH value of th...

Embodiment 3

[0048] In this example, Pt was prepared by pulsed microwave assisted chemical reduction 3 Fe / XC-72 electrocatalyst (Pt to Fe molar ratio 3:1, Pt 3 The percentage of Fe accounting for the total mass of the catalyst is 20%, then the percentage of Pt accounting for the total mass of the catalyst is 18.26%, and the percentage of Fe accounting for the total mass of the catalyst is 1.74%). The specific preparation method is as follows:

[0049] (1) According to the mass ratio of Vulcan XC-72 and ethylene glycol as 1:300, add Vulcan XC-72 to ethylene glycol, and stir evenly with ultrasonic to prepare suspension A;

[0050] (2) by the molar ratio of Fe in ferric nitrate and Pt in chloroplatinic acid is 1: 3, chloroplatinic acid and ferric nitrate are joined in the suspension A that step (1) makes together, wherein, chloroplatinic acid and The mass ratio of Vulcan XC-72 is controlled to be 1:1.66, the ultrasonic stirring is uniform, the pH value of the solution is adjusted to 10, and ...

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Abstract

The invention relates to a PtM/C electrocatalyst for a fuel cell. The PtM/C electrocatalyst comprises the following components by mass percent: 18.16-36.52% of active components, 1.74-3.68% of auxiliary agents and the balance being a conductive carrier. The PtM/C electrocatalyst is prepared by the steps of feeding precursors of the active components and precursors of the auxiliary agents into a mixed suspension liquid of the conductive carrier and a reducing agent in one step; loading metal Pt and M onto the conductive carrier by adopting a pulse microwave-assisted chemical reduction method; and after that, precipitating, filtering, washing and carrying out vacuum drying to obtain the PtM/C electrocatalyst. Compared with the prior art, the preparation method is simple; the prepared PtM/C electrocatalyst is uniform in particle distribution, small in size and high in catalytic activity of oxygen reduction reaction, and can be used in the field of the fuel cell.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and relates to a catalyst and a preparation method thereof, in particular to a PtM / C electrocatalyst for a fuel cell and a preparation method thereof. Background technique [0002] Because the proton exchange membrane fuel cell (PEMFC) has the characteristics of high energy conversion efficiency, easy start-up, and low environmental pollution, it can be used as a power source for electric vehicles, a distributed power station, and a portable mobile power source. Its key technologies have also been developed rapidly. [0003] As we all know, catalyst is the key material of PEMFC, research and development of catalyst with high activity and good stability plays a decisive role in improving the performance of fuel cell. In order to be suitable for commercial mass production, the preparation method of PtM / C catalyst needs to be improved. In the past, the preparation method of PtM / C catalyst was mo...

Claims

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Application Information

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IPC IPC(8): H01M4/92H01M4/88
CPCH01M4/9083H01M4/921H01M4/96Y02E60/50
Inventor 林瑞范仁杰杨美妮赵天天曾浩
Owner TONGJI UNIV
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