A kind of preparation method of composite electro-oxidation catalytic material
A catalytic material and electro-oxidation technology, applied in circuits, electrical components, battery electrodes, etc., can solve the problems of limiting the commercial application of direct methanol fuel cells, low electrocatalytic activity, poisoning, etc., and achieve excellent catalytic activity, large effective surface area, Resists the effects of poisoning
Active Publication Date: 2018-10-23
海门市创豪工业设计有限公司
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Problems solved by technology
However, the catalytic materials commonly used in the methanol electrooxidation process have low electrocatalytic activity and are easily poisoned by intermediate products of the methanol oxidation reaction, which limits the commercial application of direct methanol fuel cells.
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[0022] refer to figure 1 and figure 2 , the present invention provides a method for preparing a PtCo alloy nano-skeleton-loaded Fe@Ru core-shell structure nanoparticle composite electro-oxidation catalytic material, which is carried out in the following order:
[0023] ①Add nano-iron powder, analytically pure ammonium chlororuthenate, ferric thiocyanate and thiourea dioxide into deionized water to form assembly solution A. The mass percentages of each component in the assembly solution A are: nano-iron powder 7-18%, 15-24% ammonium chlororuthenate, 20-35% ferric thiocyanate, 10-15% thiourea dioxide, and the rest is deionized water; fully mix and dissolve the assembly solution A, put it into the reaction kettle, and heat to 130-150°C, react for 1.5-3 hours, then filter the solid-phase substance, wash the solid-phase substance fully with deionized water, and dry it in a drying oven at 50-70°C for 4-5.5 hours to complete the Fe@Ru Assembly of core-shell nanoparticles.
[0024...
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Abstract
The invention provides a preparation method of a composite electro-oxidation catalytic material which is high in activity, is resistant to toxicity, is provided with a PtCo alloy nanometer framework loaded with Fe@Ru core-shell structure nanoparticles and is applicable to a direct methanol fuel cell. The preparation method comprises the steps of assembling Fe@Ru core-shell structure nanoparticles by a hydrothermal reaction method, preparing the PtCo alloy nanometer framework by sacrificing a magnesium particle model and assembling the Fe@Ru nanoparticles in the PtCo alloy nanometer framework under the effect of a magnetic effect. The composite electro-oxidation catalytic material, with the PtCo alloy nanometer framework loaded with the Fe@Ru core-shell structure nanoparticles, prepared according to the invention, has relatively large effective area and excellent catalytic activity, and also has good capability of preventing a methanol oxidation intermediate product from being poisoned.
Description
technical field [0001] The invention relates to the technical field of methanol electro-oxidation catalysis, in particular to a method for preparing a highly active and anti-toxic PtCo alloy nano-skeleton loaded Fe@Ru core-shell nanoparticle composite electro-oxidation catalytic material suitable for direct methanol fuel cells. Background technique [0002] Direct Methanol Fuel Cells (DMFC) is a device that converts chemical energy into electrical energy using methanol as fuel and air or oxygen as oxidant. The direct methanol fuel cell body has the characteristics of small size, high cell efficiency and theoretical voltage, and its raw material methanol is convenient to store, so it has broad application prospects. The electro-oxidation process of methanol includes three steps: methanol adsorption and deprotonation to form intermediate products, oxygen-containing substances to participate in the reaction and product transfer. The whole process involves the transfer of 6 elec...
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IPC IPC(8): H01M4/92
CPCH01M4/921H01M4/925Y02E60/50
Inventor 赵明陈睿王宇吴伯农
Owner 海门市创豪工业设计有限公司