Co-based MOFs-heteroatom doped porous carbon catalyst for oxygen reduction and preparation method thereof

Abstract

The invention relates to the technical field of oxygen reduction catalysts, and discloses a Co-based MOFs-heteroatom doped porous carbon catalyst for oxygen reduction and a preparation method thereof.The catalyst comprises the following formula raw materials: Fe-based MOFs, 1-hydroxyethane 1,1-diphosphonic acid, chitosan, glycine, an esterification catalyst, a composite base catalyst and a condensing agent. According to the catalyst and the method, N / P co-doping enables a carbon material to form rich pore channels and a large number of mesoporous structures; the formation of active sites andmedium transmission of oxygen reduction reaction are facilitated; the core-shell nanostructure of a cobalt compound coated with a porous carbon material has a richer morphological structure, so that the catalyst has better mass transfer performance; the cobalt compound formed after the cobalt-based MOFs with the nanometer structure are calcined is uniformly loaded into the pore channels of the porous carbon material, the graphitization degree of the carbon material is improved with the cobalt compound, the electrical conductivity of the carbon material is increased, and the forward oxygen reduction reaction is promoted.

Description

technical field [0001] The invention relates to the technical field of oxygen reduction catalysts, in particular to a Co-based MOFs-heteroatom doped porous carbon oxygen reduction catalyst and a preparation method thereof. Background technique [0002] In daily life and industrial production, people mainly obtain energy by burning fossil energy, but problems such as global warming, energy depletion, and environmental pollution have become increasingly serious. Therefore, new energy conversion devices and energy storage devices are unique The advantage of the fuel cell has become a research hotspot. As a new type of energy conversion device, the anode reaction of the fuel cell can convert the chemical energy of a specific fuel into electrical energy through an electrochemical catalytic process, thereby realizing energy conversion. In the entire process of electrocatalytic energy conversion Among them, it is more environmentally friendly because there is no traditional fossil ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a Co-based MOFs-heteroatom-doped porous carbon oxygen reduction catalyst and its preparation method, which solves the problem that the current oxygen reduction reaction catalyst is easy to agglomerate and has reduced active sites At the same time, it solves the problem that the carbon material in the catalyst is not highly graphitized, which leads to poor conductivity of the catalyst, which reduces the electron transmission and diffusion rate in the oxygen reduction reaction.