Preparation method of nitrogen doped platinum-nickel bimetallic catalyst for ethanol oxidation with cubic structure

A technology of ethanol oxidation and cubic structure, applied in structural parts, electrical components, battery electrodes, etc., can solve the problems of low stability of platinum catalyst, easy poisoning, high price, etc. The effect of low onset potential

Inactive Publication Date: 2018-02-23
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, noble metal materials are mainly used as anode and cathode catalysts in the research and application of direct ethanol fuel cells. However, platinum catalysts have problems such as low stability, easy poisoning and high price, which seriously hinder their commercial development. Therefore, research Researchers combine platinum with non-noble metals or dope a very small amount of platinum to achieve the purpose of reducing the cost and improving the catalytic activity of the catalyst, which also makes the commercial application of platinum-based catalysts possible.

Method used

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  • Preparation method of nitrogen doped platinum-nickel bimetallic catalyst for ethanol oxidation with cubic structure
  • Preparation method of nitrogen doped platinum-nickel bimetallic catalyst for ethanol oxidation with cubic structure
  • Preparation method of nitrogen doped platinum-nickel bimetallic catalyst for ethanol oxidation with cubic structure

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Experimental program
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Effect test

Embodiment 1

[0013] Specific steps are as follows:

[0014] (1) At room temperature, mix 2g glucose, 0.8g urea, 0.3g nickel nitrate and 0.5mL chloroplatinic acid solution with a concentration of 7.91mg / mL in a beaker, add 50mL deionized water, and then put it in an oven to dry 12h;

[0015] (2) At room temperature, move the dried sample to a graphite tank, then put it into a vacuum tube furnace for calcination, the heating rate is 5°C / min, the calcination temperature is 900°C, and the holding time is 3h;

[0016] (3) Grinding the calcined sample into particle-free powder to obtain a nitrogen-doped platinum-nickel bimetallic catalyst. figure 1 It is the HRTEM image of the prepared nitrogen-doped platinum-nickel bimetallic catalyst, which shows that the catalyst has a cubic structure with uniform particle size and uniform distribution. figure 2 The XRD pattern of the prepared nitrogen-doped platinum-nickel bimetallic catalyst shows that both platinum and nickel are successfully loaded int...

Embodiment 2

[0018] The same as in Example 1, except that the amount of chloroplatinic acid solution was changed to 0.3 mL. The structure and morphology of the catalyst thus prepared are irregular, the dispersion is not uniform, and compared with Example 1, the current density is lower.

Embodiment 3

[0020] Same as Example 1, except that the amount of chloroplatinic acid solution was changed to 0.1 mL. Compared with Example 1, the catalyst thus prepared has higher onset potential and larger particle size.

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Abstract

The invention discloses a preparation method of a nitrogen doped platinum-nickel bimetallic catalyst for ethanol oxidation with a cubic structure. The method comprises the following steps: glucose, urea, nickel nitrate and a chloroplatinic acid solution are mixed in a beaker, the materials are prepared into an aqueous solution, drying is carried out, calcining is carried out in a high temperaturetubular furnace under a nitrogen atmosphere, an obtained sample is grinded into particle-free powder, and the platinum-nickel bimetallic catalyst is obtained. The nitrogen doped platinum-nickel bimetallic catalyst has excellent electrocatalytic oxidation activity for ethanol in a potassium hydroxide solution, stability is good, preparation cost is low, and the product is a novel high performance catalyst for direct ethanol fuel cell anode.

Description

technical field [0001] The invention belongs to the technical field of fuel cell catalysts, and specifically provides a method for preparing a nitrogen-doped platinum-nickel bimetallic ethanol oxidation catalyst with a cubic structure. Background technique [0002] At present, noble metal materials are mainly used as anode and cathode catalysts in the research and application of direct ethanol fuel cells. However, platinum catalysts have problems such as low stability, easy poisoning and high price, which seriously hinder their commercial development. Therefore, research Researchers compound platinum with non-noble metals or dope a very small amount of platinum to achieve the purpose of reducing the cost and improving the catalytic activity of the catalyst, which also makes the commercial application of platinum-based catalysts possible. [0003] Nickel electrodes are widely used in the electrocatalytic oxidation of ethanol, and in non-noble metal catalysts, Ni metal exhibit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/92
CPCH01M4/9041H01M4/921H01M4/926Y02E60/50
Inventor 余建国戴堂明李瑶
Owner TIANJIN POLYTECHNIC UNIV
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