Method for preparing Fe-N-C carbonaceous oxygen reduction catalyst through solvothermal method

Abstract

The invention discloses a method for preparing a Fe-N-C carbonaceous oxygen reduction catalyst through the solvothermal method. The method is characterized by comprising the following steps: grindinga carbonaceous material into powders, mixing the powders with phthalocyanine iron, adding normal hexane into the mixture to prepare a suspension liquid, carrying out ultrasonic vibration to achieve uniform distribution of the carbonaceous powders and sufficient dissolution of the phthalocyanine iron, adding the suspension liquid into a high-temperature reaction kettle for solvothermal reaction, and carrying out natural cooling after the reaction to obtain the catalyst; and carrying out suction filtration and washing on the catalyst through a sufficient amount of absolute ethyl alcohol to remove the remaining unreacted phthalocyanine iron, and carrying out drying to obtain catalyst powders. The method provided by the invention has the advantages that the phthalocyanine iron is used as a Fesource and an N source, so that the operation is convenient, environmental pollution is avoided, and good doping effects are achieved; further high-temperature pyrolysis is not required, so that a catalyst preparation process is greatly simplified, and the catalyst preparation cost is reduced; and both the catalytic activity and the stability of the catalyst exceed those of the Pt / C catalyst, so that the catalyst can be widely applied in fields such as energy, chemical engineering and environmental protection.

Description

technical field [0001] The invention relates to catalyst preparation, in particular to a method for preparing Fe-N-C carbonaceous oxygen reduction catalyst by solvothermal method. Background technique [0002] Fuel Cells is a device that directly converts the chemical energy of fuel into electrical energy. It has the advantages of high power generation efficiency, high specific energy, low environmental pollution, and high reliability. Fourth generation power generation technology. Fuel cells mainly include hydrogen-oxygen fuel cells, direct methanol fuel cells, formic acid / formate fuel cells, proton exchange membrane fuel cells, microbial fuel cells, etc. Different fuel cell types have the same cathode oxygen reduction reaction, so The electrocatalysis of oxygen reduction reaction has become the basis and bottleneck of fuel cell development. [0003] Existing oxygen reduction electrocatalysts face a series of problems such as complex oxygen reduction reaction pathways, sl...

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Problems solved by technology

[0003] Existing oxygen reduction electrocatalysts face a series of problems such as complex oxygen reduction reaction pathways, slow oxygen reduction kinetics, and high overpotentials, which limit the energy efficiency and power generation capacity of fuel cells.

Although the traditional high-activity noble metal catalyst Pt has promoted the practical application of fuel cells, there are still the following problems for the expansion, commercialization and large-scale use of fuel cells: Pt metal is expensive, has little reserves, is easy to be poisoned, and is easy to fall off Dissolution, poor stability, etc.

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