Preparation method of phosphorus-doped direct methanol fuel cell anode catalyst

Abstract

The invention discloses a preparation method of a phosphorus-doped direct methanol fuel cell anode catalyst. The preparation method comprises the following preparation steps: step 1, preparing materials and instruments required by an experiment; 2, the prepared carbon nanotubes are placed in a NaOH solution to be pretreated, washed with water and dried for standby application; 3, ultrasonically dispersing a multi-walled carbon nanotube in ethanol, adding triphenylphosphine into the multi-walled carbon nanotube, dissolving, uniformly mixing, heating, stirring, evaporating to dryness, putting an obtained precursor into a tubular furnace, and calcining in a nitrogen atmosphere to obtain a phosphorus-doped carbon nanotube marked as P-CNT; the preparation method comprises the following steps: taking triphenylphosphine as a phosphorus source, and performing phosphorus doping on a multi-walled carbon nanotube; the PtNi / P-CNTs methanol fuel cell anode catalyst is prepared by loading noble metal Pt and non-noble metal Ni alloy particles on phosphorus-doped carbon nanotubes through a chemical reduction method, the carbon nanotubes generate different defects and vacancies due to phosphorus doping, more active sites are provided, and the activity of the catalyst is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of an anode catalyst for a methanol fuel cell, and in particular relates to a preparation method for an anode catalyst for a phosphorus-doped direct methanol fuel cell. Background technique [0002] The direct methanol fuel cell is a low temperature fuel cell, using a proton exchange membrane as a solid electrolyte and methanol as a fuel. Relevant technologies continue to progress, and the prospects for industrialization and practical application are increasingly bright, showing a good development momentum. DMFC single cells are mainly composed of membrane electrodes, bipolar plates, current collector plates and sealing gaskets. The membrane electrode composed of the catalyst layer and the proton exchange membrane is the core component of the fuel cell, and all the electrochemical reactions of the fuel cell are completed by the membrane electrode. The main function of the proton exchange mem...

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Problems solved by technology

[0004] The technical problem to be solved in the present invention is to overcome the existing defects and provide a method for preparing a phosphorus-doped direct methanol fuel cell anode catalyst, so as to solve the current direct methanol fuel cell preparation process proposed in the above-mentioned background technology. Catalytic oxidation is difficult, the activity of the catalyst is not high and it is easy to be poisoned and deactivated

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