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Non-noble metal catalyst for fuel cell and preparation method of non-noble metal catalyst

A fuel cell, non-precious metal technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as the gap between ORR activity and catalytic stability, difficult to control reaction conditions, and complicated preparation process steps for non-precious metal catalysts, achieving easy industrialization. The effect of production promotion, simple synthesis steps and strong controllability of reaction parameters

Pending Publication Date: 2022-04-12
先进能源产业研究院(广州)有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The non-platinum catalysts currently used in fuel cells include carbon-based transition metal sulfides, carbides, nitrides, carbonitrides, oxides, and nitrogen oxides, etc., but their ORR activity and catalytic stability are still comparable to those of traditional Pt-based catalysts. there is a certain gap
Moreover, the preparation process steps of the existing non-noble metal catalysts are complicated, and there are too many dependent variables, and the reaction conditions are difficult to control, which in turn affects the catalytic activity and stability of the prepared non-metal catalysts.

Method used

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Embodiment 1

[0022] Weigh 5mmol of cobalt chloride, 2.5mmol of potassium cobaltcyanide and 3g of graphene oxide, dissolve them in 5mL of deionized water, and obtain a black hydrogel after standing in an oven at 50°C for 10 hours; prepare 1g / mL of NaBH 4 Solution 100mL, poured into the above hydrogel and stirred at 80°C for 6h to obtain graphene oxide-supported cobalt tetraoxide nanosheets; disperse the obtained graphene oxide-supported cobalt tetraoxide nanosheets in ethanol and water to obtain an electrocatalyst dispersion , used as a fuel cell catalyst.

Embodiment 2

[0024] Weigh 10mmol of cobalt chloride, 5mmol of potassium cobaltcyanide and 4g of graphene oxide and dissolve them in 10mL of deionized water. After standing in an oven at 50°C for 8 hours, a black hydrogel is obtained; prepare 2g / mL of NaBH 4 Solution 100mL, poured into the above hydrogel and stirred at 80°C for 10h to obtain graphene oxide-supported cobalt tetraoxide nanosheets; disperse the obtained graphene oxide-supported cobalt tetraoxide nanosheets in ethanol and water to obtain an electrocatalyst dispersion , used as a fuel cell catalyst.

Embodiment 3

[0026] Weigh 3mmol of cobalt chloride, 1.5mmol of potassium cobaltcyanide and 2g of graphene oxide, dissolve them in 3mL of deionized water, and obtain a black hydrogel after standing in an oven at 50°C for 12 hours; prepare 1g / mL of NaBH 4 80 mL of the solution was poured into the above hydrogel and stirred at 80°C for 8 hours to obtain graphene oxide-supported cobalt tetraoxide nanosheets; the obtained graphene oxide-supported cobalt tetraoxide nanosheets were dispersed in ethanol and water to obtain an electrocatalyst dispersion , used as a fuel cell catalyst.

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Abstract

The invention belongs to the technical field of fuel cells, and particularly relates to a non-noble metal catalyst for a fuel cell and a preparation method of the non-noble metal catalyst. The preparation method of the non-noble metal catalyst for the fuel cell comprises the following steps: (1) preparing hydrogel; and (2) preparing the graphene oxide loaded cobaltosic oxide nanosheet composite material. The preparation method is simple in synthesis step, the catalyst can be obtained only through one-step reduction, the controllability of reaction parameters is high, and industrial production and popularization are easy to achieve.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a non-noble metal catalyst for fuel cells and a preparation method thereof. Background technique [0002] At present, the vigorous promotion and use of hydrogen energy provides an excellent way to reduce environmental pollution and solve the energy crisis with broad prospects. The application technology of hydrogen energy is gradually developing and maturing, the industrial chain of hydrogen energy is improving day by day, and the development prospect of hydrogen energy is also attracting the attention of the whole world. Because the fuel cell does not need to go through the Carnot cycle, the energy loss is small, the energy utilization efficiency is high, and it has the advantages of environmental friendliness such as greenness and cleanliness, therefore, the fuel cell has become an ideal way to rationally utilize hydrogen energy. Hydrogen energy and fuel cells c...

Claims

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Application Information

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IPC IPC(8): H01M4/90B82Y30/00B82Y40/00
CPCY02E60/50
Inventor 陈忠伟马歌王新韦小玲
Owner 先进能源产业研究院(广州)有限公司
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