Low-cost ordered porous oxygen reduction catalyst and preparation method thereof

Abstract

The invention belongs to the technical field of energy catalysts, and discloses a low-cost ordered porous oxygen reduction catalyst and a preparation method thereof. The oxygen reduction catalyst is of a porous structure and comprises C, N, O, Co and Fe, and the total mass fraction of N, O, Co and Fe in the oxygen reduction catalyst is lower than 15%. The ordered porous oxygen reduction catalyst shows excellent oxygen reduction performance, the oxygen reduction half-wave potential under the condition of alkaline electrolyte can exceed 0.86 V, and the oxygen reduction half-wave potential under the condition of acidic electrolyte can exceed 0.76 V. The oxygen reduction catalyst does not contain noble metal, the preparation cost is low, and the catalytic activity is equivalent to or even exceeds the catalytic performance of a noble metal catalyst.

Description

technical field [0001] The invention belongs to the technical field of energy catalysts, in particular to a low-cost ordered porous oxygen reduction catalyst and a preparation method thereof. Background technique [0002] The global energy crisis and increasingly serious environmental pollution problems are increasingly affecting the development of human society. Increasing the proportion of renewable energy, combined with green and non-polluting electrochemical energy storage and conversion devices, will greatly alleviate the current energy and environmental problems. Therefore, green energy devices such as fuel cells, metal-air batteries, and lithium-ion batteries have gradually attracted people's attention. However, the oxygen reduction reaction occurs on the cathode side of both fuel cells and metal-air batteries, requiring the use of highly efficient catalytic materials to enable rapid electrochemical reactions. However, the current commercial oxygen reduction catalys...

AI Technical Summary

Problems solved by technology

However, the completion of the oxygen reduction reaction essentially requires catalytically active sites accessible to oxygen, and if oxygen cannot access the internal unexposed active sites, it cannot actually contribute to the oxygen reduction.

The transition metal-nitrogen-carbon materials in the prior art have low catalytic performance for the oxygen reduction reaction and cannot reach the level of noble metal catalysts

Images