期刊
CHEMSUSCHEM
卷 14, 期 3, 页码 852-859出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.202002785
关键词
CO2 reduction; electrocatalyst; formate; nanosheets; Zn vacancies
资金
- National Natural Science Foundation of China [22075092]
- China Postdoctoral Science Foundation [2018M642810]
- Program for HUST Academic Frontier Youth Team [2018QYTD15]
- WNLO of HUST
This study demonstrates that ultrathin ZnIn2S4 nanosheets with abundant Zn vacancies show promising performance in electrocatalytic CO2 reduction, with a high electrochemically active surface area and optimized intermediate binding energy contributing to boosted selectivity and activity. This could provide insights for designing efficient catalysts for selective CO2 electroreduction.
Electrocatalytic conversion of carbon dioxide (CO2) is promising for balancing carbon cycles while producing value-added feedstocks. Herein, ultrathin ZnIn2S4 nanosheets with abundant Zn vacancies are demonstrated for electrochemically reducing CO2 to formate. Specifically, a partial current density of 245 mA cm(-2) with a near-unity faradaic efficiency of 94 % for formate generation was achieved over the ultrathin ZnIn2S4 nanosheets in a flow cell configuration. Experimental and theoretical results revealed that abundant Zn vacancies in the ultrathin ZnIn2S4 nanosheets with a high electrochemically active surface area synergistically optimized the intermediate binding energy and contributed to the boosted selectivity and activity. This work may provide useful understandings in designing efficient catalysts for selective CO2 electroreduction.
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