Chemical Research in Chinese Universities ›› 2022, Vol. 38 ›› Issue (6): 1380-1386.doi: 10.1007/s40242-022-2091-0

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Bismuth/Graphdiyne Heterostructure for Electrocatalytic Conversion of CO2 to Formate

DU Yuncheng1,2, ZHENG Xuchen2, XUE Yurui2,3, LI Yuliang2,4   

  1. 1. Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China;
    2. Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China;
    3. Science Center for Material Creation and Energy Conversion, School of Chemistry and Chemical Engineering, Institute of Frontier and Interdisciplinary Science, Shandong University, Jinan 250100, P. R. China;
    4. School of Chemical Science, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
  • Received:2022-03-13 Online:2022-12-01 Published:2022-12-06
  • Contact: LI Yuliang, XUE Yurui E-mail:ylli@iccas.ac.cn;yrxue@sdu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Nos.21790050, 21790051, 22021002), the National Key Research and Development Project of China(No.2018YFA0703501), and the Key Program of the Chinese Academy of Sciences(No.XDPB13).

Abstract: Electrocatalytic CO2 reduction is great promising in alleviating the excessive CO2 emission and the conversion to valuable productions. Herein we report the in-situ controlled growth of Bismuth nanoflower/graphdiyne heterostructures(Bi/GDY) for efficient CO2 conversion toward formate. Based on GDY, the obtained electrocatalyst exhibits a partial current density of 19.2 mA/cm2 and high reaction selectivity towards formate with a high Faradic efficiency of 91.7% at ‒1.03 V vs. RHE, and an energy efficiency of 58.8%. The high formate yield rates could be maintained at around 300 μmol/(cm2·h) over a wide potential range. Detailed characterizations show that the unique interface structures between GDY and Bi can enhance the charge transfer ability, increase the number of active sites, and improve the long-term stability, and finally reach high-performance electrocatalytic conversion of CO2 to formate.

Key words: Graphdiyne(GDY), Heterostructure, CO2 reduction reaction(CO2RR), Formate