Wang Zhitong, Qi Ruijuan, Liu Dongyu, Zhao Xiaodie, Huang Lei, Chen Shenghua, Chen Zhiquan, Li Mingtao, You Bo, Pang Yuanjie, Yu Xia Bao
Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education) Hubei Key Laboratory of Material Chemistry and Service Failure, Wuhan National Laboratory for Optoelectronics School of Chemistry and Chemical Engineering Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan, 430074, P. R. China.
International Research Center for Renewable Energy (IRCRE) State Key Laboratory of Multiphase Flow in Power Engineering (MFPE), Xi'an Jiaotong University (XJTU), Xianning West Road, Xi'an, 710049, P. R. China.
ChemSusChem. 2021 Feb 5;14(3):852-859. doi: 10.1002/cssc.202002785. Epub 2021 Jan 12.
Electrocatalytic conversion of carbon dioxide (CO ) is promising for balancing carbon cycles while producing value-added feedstocks. Herein, ultrathin ZnIn S nanosheets with abundant Zn vacancies are demonstrated for electrochemically reducing CO to formate. Specifically, a partial current density of 245 mA cm with a near-unity faradaic efficiency of 94 % for formate generation was achieved over the ultrathin ZnIn S nanosheets in a flow cell configuration. Experimental and theoretical results revealed that abundant Zn vacancies in the ultrathin ZnIn S 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 CO electroreduction.
二氧化碳（CO₂）的电催化转化在平衡碳循环的同时生产增值原料方面具有广阔前景。在此，展示了具有大量锌空位的超薄ZnIn₂S₄纳米片用于将CO₂电化学还原为甲酸盐。具体而言，在流动池配置中，超薄ZnIn₂S₄纳米片上实现了245 mA cm⁻²的部分电流密度以及生成甲酸盐的近100%的法拉第效率，为94%。实验和理论结果表明，具有高电化学活性表面积的超薄ZnIn₂S₄纳米片中大量的锌空位协同优化了中间体结合能，并有助于提高选择性和活性。这项工作可能为设计用于选择性CO₂电还原的高效催化剂提供有益的见解。
