Nitrogen-doped graphene-carbon nanotube composite catalyst and preparation method thereof

Abstract

The invention relates to the field of catalysts, and particularly discloses a nitrogen-doped graphene-carbon nanotube composite catalyst and a preparation method thereof. The invention discloses the nitrogen-doped graphene-carbon nanotube composite catalyst. The catalyst comprises a carbon carrier and noble metal loaded on the carbon carrier; the carbon carrier is composed of nitrogen-doped reduced graphene oxide and a nitrogen-doped carbon nanotube; the preparation method comprises the following steps: mixing nitrogen-doped reduced graphene oxide with a noble metal precursor solution, and depositing noble metal on the nitrogen-doped reduced graphene oxide to obtain noble metal-loaded nitrogen-doped reduced graphene oxide; and combining the nitrogen-doped carbon nanotube with the noble metal-loaded nitrogen-doped reduced graphene oxide through an in-situ chemical reduction method to obtain the nitrogen-doped graphene-carbon nanotube composite catalyst. The nitrogen-doped graphene-carbon nanotube composite catalyst provided by the invention can be used for a fuel cell, and has the advantages of high catalytic activity and high stability; in addition, the preparation method has the advantages of being simple, large in yield and suitable for batch production.

Description

technical field [0001] The application relates to the field of catalysts, more specifically, it relates to a nitrogen-doped graphene-carbon nanotube composite catalyst and a preparation method thereof. Background technique [0002] Metal catalyst is a catalyst with metal as the main active component, mainly including transition elements such as noble metals, iron, cobalt, nickel, etc.; according to whether the active components of the catalyst are supported on the carrier, it can be divided into non-supported metal catalysts and supported Catalyst, in which the supported catalyst is to load the metal component on the carrier, and the catalyst carrier has a larger specific surface area, which can better disperse the metal particles, thereby improving the catalytic efficiency of the metal, so the supported catalyst is widely used Fuel cells, petrochemical and other fields. [0003] At present, the common catalyst carrier is carbon black material. Among them, VulcanXC-72 is on...

AI Technical Summary

Problems solved by technology

However, when the graphene-carbon nanotube composite carrier is used as the carrier of the noble metal, the noble metal particles are only loaded on the carrier by physical adsorption deposition, and the noble metal catalyst is prone to fall off during the catalytic process, which affects the stability of the catalyst.

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