A kind of preparation method of zif-8 derived n, s-co-doped non-metallic carbon-based nano-electrocatalyst for oxygen reduction

Abstract

A preparation method of ZIF-8-derived N, S-co-doped non-metallic carbon-based nanometer oxygen reduction electrocatalyst. The invention synthesizes a uniform ZIF-8 precursor by controlling the synthesis conditions of the crystal, and then mixes ZIF-8 and sulfur-containing small molecules through a solvent to form a uniformly dispersed mixed material, and finally carbonizes at a high temperature in a tube furnace to obtain a black Powdered carbon materials, without further post-treatment, yield ZIF‑8-derived N, S‑co-doped non-metallic carbon-based nano-oxygen reduction electrocatalysts. Thanks to the uniform size of ZIF‑8 and the volatility of metal Zn, the material forms a uniform thin-layer shell-like graphitic carbon material. The large specific surface area, the structural characteristics of S and N co-doping, and during the carbonization process, a part of Zn and S form a semiconductor ZnS crystal with high conductivity, which makes the material have high electrocatalytic performance.

Description

A ZIF-8-derived N, S-co-doped non-metallic carbon-based nano-electrocatalyst for oxygen reduction Preparation method of chemical agent technical field The present invention relates to a kind of simple and feasible, the non-metallic carbon-based nano-oxygen of low-cost preparation of efficient N, S co-doping Reduction catalysts are mainly involved in the fields of material photochemistry, electrochemistry, fuel cells, oxygen reduction catalysis, etc. Background technique [0002] With the development of science and technology, mobile devices such as mobile phones and notebooks have become indispensable tools in people's lives. The problem of battery life has always been an important issue restricting the development of mobile devices. Therefore, the preparation of efficient energy conversion devices has attracted widespread attention. General attention. Fuel cell is a green and efficient energy utilization device, but the anode material is usually expensive and rare. ...

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Problems solved by technology

Although a series of progress has been made in the preparation of heteroatom-doped non-metallic carbon materials using ZIF-8 as a carbon source and template, but using ZIF-8 as a precursor, 4-(2-thienyl)pyrimidine-2-thiol and Preparation of N,S-co-doped non-metallic carbon-based nanoscale oxygen reduction catalysts with triethylamine as sulfur and nitrogen sources has not been reported yet

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