Defect Engineering in Polymeric Cobalt Phthalocyanine Networks for Enhanced Electrochemical CO2 Reduction

Haihong Wu, Min Zeng, Xiang Zhu, Chengcheng Tian, Bingbao Mei, Yue Song, Xian Long Du, Zheng Jiang, Lin He, Chungu Xia, Sheng Dai

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

The electrochemical reduction of CO2 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 CO2 reduction. The successful defect engineering not only promotes the formation of a stronger binding surface towards CO2, 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 CO2 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 CO2 reduction, such as those (defective MOFs, COFs etc.), evidently advancing the development of catalysts for the CO2 reduction reaction.

Original languageEnglish
Pages (from-to)2717-2721
Number of pages5
JournalChemElectroChem
Volume5
Issue number19
DOIs
StatePublished - Oct 1 2018

Funding

C.T. and S.D. were supported by the U.S. Department of Energy, Office of Sciences, Basic Energy Sciences, Chemical Sciences, Geosciences, and Biosciences Division. Financial supports from National Program for Thousand Young Talents of China, Foundation research project of Jiangsu Province (BK20171242), National Natural Science Foundation of China (21633013) and Key Research Program of Frontier Sciences of CAS (QYZDJ-SSW-SLH051) were much appreciated.

Keywords

  • defect engineering
  • electrochemical CO reduction
  • materials science
  • polymeric cobalt phthalocyanine network
  • polymers

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