Method of preparing anode catalyst for direct methyl alcohol fuel cell

A methanol fuel cell, electrocatalyst technology, applied in battery electrodes, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of cumbersome methods, complicated organic phase removal, harsh reaction conditions, etc.

Inactive Publication Date: 2005-03-30
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, this method is cumbersome and has strict requirements on conditions such as temperature, solution concentration, pH value, and reaction time.
(4) Metal cluster synthesis [Schmidt, M.Noeske, H.A.Gasteiger, R.J.Behm, J.Electrochem.Soc., Vol.145, No.3, March 1998], that is, the metal and the reducing agent are in an appropriate organic phase Metal clusters are obtained by reaction, and then adsorbed by a carrier. This method can obtain catalyst particles with a smaller particle size, but the reaction conditions are harsh, and the removal of the organic phase is also complicated.
The preparation of catalysts by the above preparation methods will cause certain pollution to the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] Example 1: Add 400mg of activated carbon to 200mL of ethanol / deionized water mixed solvent with a volume ratio of 1:5, stir for 1 hour, slowly add chloroplatinic acid solution dropwise, the platinum content is 0.2g / L, stir, slowly drop Scatter ruthenium chloride solution, the ruthenium content is 0.1g / L, slowly add 100mg of formaldehyde dropwise, stir, then atomize the reaction solution through the spray device and introduce it into the reactor for spray pyrolysis reaction, the pyrolysis temperature is 120°C, The carrier gas used is a mixture of nitrogen and hydrogen, and the volume ratio is nitrogen:hydrogen=8:2. A PtRu / C electrocatalyst with a particle size of 3±0.5 nm was obtained. The particle size of platinum and ruthenium in the catalyst is 3±0.5 nanometers, and the methanol oxidation polarization curve measured by the half-cell shows that its performance is better than that of the corresponding electrocatalyst of E-TEK company.

Embodiment 2

[0007] Embodiment 2: other conditions are the same as embodiment 1, only change the quality of gac to be 600mg, join in the ethanol / deionized water mixed solvent that 300mL volume ratio is 1: 10, platinum content is 1g / L, reducing agent is 250mg formaldehyde . The particle size of platinum in the catalyst is 3±0.5 nanometers, and the methanol oxidation polarization curve measured by the half-cell shows that its performance is better than that of the corresponding electrocatalyst from E-TEK Company.

Embodiment 3

[0008] Embodiment 3: other conditions are the same as embodiment 1, only changing the quality of gac is 748mg, and platinum content is 0.8g / L, and the content of ruthenium is 0.2g / L, and reducing agent is 58mg formic acid. The particle size of platinum in the catalyst is 3±0.5 nanometers, and the methanol oxidation polarization curve measured by the half-cell shows that its performance is better than that of the corresponding electrocatalyst from E-TEK Company.

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Abstract

Method of spraying pyrolysis and carrier gas deoxidation is adopted to make particles of platinum and ruthenium deoxidized from chloro-platinic acid and ruthenium trichloride distribute in pores of active carbon and surface evenly. Moreover, particle diameter of platinum is in 3+ / - 0.5 Nano evenly. Features of the method are simple operation, producing Nano platinum and ruthenium / carbon electrocatalyst continuously without need of procedures of filtering, washing and drying. Performance of the electrocatalyst for oxidation catalysis of methanol is better than relevant product of platinum and ruthenium / carbon electrocatalyst produced from E-TEK Company.

Description

technical field [0001] The invention belongs to a preparation method of an anode electrocatalyst of a direct methanol fuel cell. Background technique [0002] Direct methanol fuel cell (DMFC) is a new type of environmentally friendly power generation device that directly converts chemical energy into electrical energy. Its outstanding advantages are abundant sources of methanol, cheap price, and its aqueous solution is easy to carry and store. Therefore, the direct methanol fuel cell is particularly suitable as a mobile power source for various purposes. At present, the preparation methods of carbon-supported noble metal catalysts are mainly divided into the following types: (1) impregnation method [J.B.Goodenough, A.Hamnett, B.J.Kemmedy, etal.Electrochimica Acta, 15 (1990) 199-207], which is to prepare supported metal catalysts The most commonly used method is to directly use the metal salt solution as the impregnation solution, and use different methods to reduce the pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J23/40H01M4/88H01M4/90H01M4/92
CPCY02E60/50
Inventor 邢巍薛新忠刘长鹏陆天虹
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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