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Defect Engineering in Polymeric Cobalt Phthalocyanine Networks for Enhanced Electrochemical CO 2 Reduction
Author(s) -
Wu Haihong,
Zeng Min,
Zhu Xiang,
Tian Chengcheng,
Mei Bingbao,
Song Yue,
Du XianLong,
Jiang Zheng,
He Lin,
Xia Chungu,
Dai Sheng
Publication year - 2018
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201800806
Subject(s) - overpotential , cobalt , faraday efficiency , electrochemistry , phthalocyanine , catalysis , materials science , electrocatalyst , reversible hydrogen electrode , aqueous solution , surface engineering , nanotechnology , electrochemical energy conversion , chemical engineering , electrode , chemistry , organic chemistry , working electrode , engineering , metallurgy
The electrochemical reduction of CO 2 into fuels and valuable chemicals represents an appealing approach to alleviate energy crisis and global warming. Due to its sluggish reaction kinetics and the lack of suitable electrocatalysts it remains a major challenge. In this work, we report a facile synthetic approach to engineer a polymeric cobalt phthalocyanine network with rich defects for significantly enhanced electrocatalytic activity for CO 2 reduction. The successful defect engineering not only promotes the formation of a stronger binding surface towards CO 2 , but also simultaneously turns the electronic character of the resulting cobalt phthalocyanine framework. As a result, the new defective polymer exhibits highly selective catalysis of aqueous reduction of CO 2 into CO with a large faradaic efficiency of ca. 97 %, low applied overpotential of 490 mV (versus a reversible hydrogen electrode) and long‐term stability. We anticipated that this new strategy could inspire the discovery of new organic frameworks for efficient CO 2 reduction, such as those (defective MOFs, COFs etc.), evidently advancing the development of catalysts for the CO 2 reduction reaction.