Preparation method of PtRu/C binary alloy nano catalyst

Abstract

The invention discloses a preparation method of a PtRu/C binary alloy nano catalyst. The preparation method comprises the following steps of: dissolving active carbon in water and then heating up and stirring to obtain carbon paste; sequentially dropping H2PtCl6, RuCl3 and a metal protector into the carbon paste, then stirring by using ultrasound and regulating the pH value to 8; slowly dropping a reducing agent; and carrying out vacuum filtration, washing and vacuum drying after reacting to finally obtain the PtRu/C binary alloy nano catalyst. The obtained PtRu/C binary alloy nano catalyst has good dispersity and strong capacity of resisting CO poisoning, and meanwhile, because the particle size range of the obtained PtRu/C binary alloy nano catalyst is 3-5 nm, the PtRu/C binary alloy nano catalyst has the characteristic of narrow particle size range; the agglomeration of PtRu/C binary alloy particles is slowed down, and the stability of the alloy is increased; meanwhile, the catalytic activity of the PtRu/C binary alloy nano catalyst to methanol is also improved to certain degree. The preparation method has the advantages of simple and convenient operation, less time consumption, and the like.

Description

technical field [0001] The invention relates to a preparation method of a PtRu / C binary alloy nano catalyst, which belongs to the field of materials. Background technique [0002] Because of its high energy conversion efficiency and low pollution, it is beneficial to reduce the excessive use of fossil fuels and protect the earth's environment. Fuel cells have now attracted widespread attention from researchers from all over the world. Direct methanol fuel cell is a variant of hydrogen proton exchange membrane fuel cell. Methanol is equivalent to a hydrogen storage carrier. Methanol is a liquid organic compound with the simplest structure at normal temperature and pressure. It is easy to store, easy to source, and cheap. An ideal renewable fuel, and there is no C-C bond in the methanol molecule, high electrochemical activity, and can maintain a high energy conversion efficiency. [0003] Pt has high catalytic activity for methanol oxidation, but the intermediate product of m...

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Problems solved by technology

[0007] The present invention utilizes the impregnation method and uses trisodium citrate as a protective agent to prepare PtRu / C binary alloy nanoparticles with good dispersion properties, which better solves the shortcoming of the traditional impregnation method for preparing catalyst metals with a wide range of particle diameters, and is also certain. To a certain extent, the aggregation of PtRu / C binary alloy nanoparticles is inhibited, thereby improving the catalytic activity for methanol

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