A high-performance oxygen evolution catalyst in neutral-pH for sunlight-driven CO2 reduction-Reference-Cited by-同舟云学术

A high-performance oxygen evolution catalyst in neutral-pH for sunlight-driven CO2 reduction

Published:2019-09-09 Issue:1 Volume:10 Page:
ISSN:2041-1723
Container-title:Nature Communications
language:en
Short-container-title:Nat Commun

Author:

Zhou Li Qin,Ling Chen,Zhou Hui^ORCID,Wang Xiang,Liao Joseph,Reddy Gunugunuri K.,Deng Liangzi^ORCID,Peck Torin C.,Zhang Ruigang,Whittingham M. Stanley,Wang Chongmin^ORCID,Chu Ching-Wu,Yao Yan^ORCID,Jia Hongfei^ORCID

Abstract

Abstract The efficiency of sunlight-driven reduction of carbon dioxide (CO2), a process mimicking the photosynthesis in nature that integrates the light harvester and electrolysis cell to convert CO2 into valuable chemicals, is greatly limited by the sluggish kinetics of oxygen evolution in pH-neutral conditions. Current non-noble metal oxide catalysts developed to drive oxygen evolution in alkaline solution have poor performance in neutral solutions. Here we report a highly active and stable oxygen evolution catalyst in neutral pH, Brownmillerite Sr2GaCoO5, with the specific activity about one order of magnitude higher than that of widely used iridium oxide catalyst. Using Sr2GaCoO5 to catalyze oxygen evolution, the integrated CO2 reduction achieves the average solar-to-CO efficiency of 13.9% with no appreciable performance degradation in 19 h of operation. Our results not only set a record for the efficiency in sunlight-driven CO2 reduction, but open new opportunities towards the realization of practical CO2 reduction systems.

Publisher

Springer Science and Business Media LLC

Subject

General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry

Link

http://www.nature.com/articles/s41467-019-12009-8.pdf

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