Platinum-cobalt alloy catalyst for fuel cell, and preparation method thereof

A platinum-cobalt alloy, fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of insufficient reducing ability, alloying of Pt and transition metals, etc., to achieve fewer steps, half-wave potential and limit current density improvement , a wide range of effects

Pending Publication Date: 2021-07-23
郑州中科新兴产业技术研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention proposes a platinum-cobalt alloy catalyst for fuel cells and a preparation method thereof, which solves the problem that the reduction ability of polyalcohols is insufficient to alloy Pt with transition metals

Method used

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  • Platinum-cobalt alloy catalyst for fuel cell, and preparation method thereof
  • Platinum-cobalt alloy catalyst for fuel cell, and preparation method thereof
  • Platinum-cobalt alloy catalyst for fuel cell, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A platinum-cobalt alloy catalyst for a fuel cell and a preparation method thereof, comprising the steps of:

[0034] 1) Precursor dispersion: Weigh 120mg platinum acetylacetonate, 80mg XC-72, 281.1mg CoSO 4 ·7H 2 O, 20mgMn 2 (CO) 10 Put them into 50mL beakers respectively, add appropriate amount of ethylene glycol, and ultrasonically disperse for 30 minutes to obtain a uniform slurry;

[0035] 2) Catalyst synthesis: first add the XC-72 solution dispersed in step 1) into the flask, then add platinum acetylacetonate, CoSO 4 ·7H 2 O and Mn 2 (CO) 10 Add it dropwise to the XC-72 solution one by one, and react for 3 hours at 150°C in an oil bath;

[0036] 3) Catalyst separation: After cooling to room temperature, carry out centrifugal washing and drying, the centrifugal speed is 8000rpm, the centrifugal time is 5min, and vacuum drying is carried out at 60°C for 12h;

[0037]4) Catalyst pickling: add 0.5M H to the sample obtained in step 3) 2 SO 4 The solution was s...

Embodiment 2

[0060] A platinum-cobalt alloy catalyst for a fuel cell and a preparation method thereof, comprising the steps of:

[0061] 1) Precursor dispersion: The difference from Example 1 is that the Mn 2 (CO) 10 The addition amount is changed to 10 mg, and other steps are the same as step 1 of Example 1);

[0062] 2) Catalyst synthesis: same as step 2 of Example 1);

[0063] 3) Catalyst separation: same as step 3 of Example 1);

[0064] 4) Catalyst pickling: same as Step 4) of Example 1.

Embodiment 3

[0066] A platinum-cobalt alloy catalyst for a fuel cell and a preparation method thereof, comprising the steps of:

[0067] 1) Precursor dispersion: The difference from Example 1 is that the Mn 2 (CO) 10 The addition amount is changed to 30 mg, and other steps are the same as step 1 of Example 1);

[0068] 2) Catalyst synthesis: same as step 2 of Example 1);

[0069] 3) Catalyst separation: same as step 3 of Example 1);

[0070] 4) Catalyst pickling: same as Step 4) of Example 1.

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Abstract

The invention provides a platinum-cobalt alloy catalyst for a fuel cell, and a preparation method thereof. The platinum-cobalt alloy catalyst is prepared by adopting a polyol reduction method, and the preparation method specifically comprises the following steps: firstly, respectively adding a platinum precursor, a cobalt precursor, a carbon carrier and a reducing agent into polyol, carrying out ultrasonic dispersion to obtain a uniform solution, then transferring carbon carrier slurry into a round-bottom flask, respectively dropwise adding the platinum precursor, cobalt precursor and reducing agent solution, carrying out oil bath heating reaction, cooling, centrifuging, washing and carrying out vacuum drying; and grinding, adding an acid solution for etching, cooling, centrifuging, washing, and carrying out vacuum drying to obtain the high-performance platinum-cobalt alloy catalyst. The preparation method is simple in process, low in raw material cost and high in synthesis efficiency, the prepared carbon-loaded platinum-cobalt alloy electrocatalyst is excellent in oxygen reduction reaction activity, and a test result shows that the half-wave potential, the limiting current density, the electrochemical active area, the mass activity and the like of the synthesized platinum-cobalt alloy electrocatalyst are remarkably superior to those of commercial platinum-carbon.

Description

technical field [0001] The invention relates to the field of electrocatalysis of proton exchange membrane fuel cells, in particular to a platinum-cobalt alloy catalyst for fuel cells and a preparation method thereof. Background technique [0002] With the depletion of traditional petrochemical energy and the accelerated deterioration of environmental problems, it is imperative to develop new clean energy and establish a clean and efficient new energy structure. Hydrogen energy is regarded as the clean energy with the most development potential in the 21st century. It has the characteristics of "clean, efficient, safe and sustainable", and is recognized as the most potential energy carrier in the future. [0003] Proton exchange membrane fuel cell (PEMFC), which can directly convert the chemical energy in hydrogen into electrical energy without going through the Carnot cycle, has many advantages such as mild operating temperature, high energy density, fast start-up at room te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M4/88B82Y30/00
CPCH01M4/921H01M4/926H01M4/88B82Y30/00Y02E60/50
Inventor 陈庆军陈慧领薛晓艺乔越洋王倩倩
Owner 郑州中科新兴产业技术研究院
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