首页|BiO2-x Nanosheets with Surface Electron Localizations for Efficient Electrocatalytic CO2 Reduction to Formate

BiO2-x Nanosheets with Surface Electron Localizations for Efficient Electrocatalytic CO2 Reduction to Formate

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To enhance the activity and selectivity of electro-catalytic CO2 reduction to formate is of great im-portance from both environmental and economical viewpoints.Herein,the Bio2-x nanosheets with sur-face electron localizations were constructed and utilized for the efficient CO2-to-formate conversion.The formate Faraday efficiency reaches 99.1％with current density of 12 mA cm-2 at-1.1 V versus the reversible hydrogen electrode(RHE)in an H-type cell while those in the flow cell are 91.3％and 319 mA cm-2 at-1.0 V versus RHE,respectively.Theoretical calculations indicate that the electron localization presenting in the Bio2-x nanosheet favors OCHO*intermediate stabilization and sup-presses H*intermediate adsorption,thus improving the Co2-to-formate efficiency.The Bio2-x electroca-talyst is nondopant,easily prepared,low-cost,high-ly active and selective for CO2RR to formate,which has demonstrated potential for application in the Zn-CO2 battery.The maximum power density can reach 2.33 mW cm-2,and the charge/discharge cy-cling stability is＞100 h(300 cycles)at 4.5 mA cm-2.

BiO2-xelectron localizationCO2 elec-troreductionformateZn-CO2 battery

Zhonghao Tan、Jianling Zhang、Yisen Yang、Yufei Sha、Ran Duan、Jiajun Zhong、Buxing Han、Jingyang Hu、Yingzhe Zhao

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Beijing National Laboratory for Molecular Sciences,CAS Key Laboratory of Colloid,Interface and Chemical Thermo-dynamics,CAS Research/Education Center for Excellence in Molecular Sciences,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190

School of Chemical Sciences,University of Chinese Academy of Sciences,Beijing 100190

Key Laboratory of Photochemistry,Beijing National Laboratory for Molecular Sciences,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190

Beijing Synchrotron Radiation Facility(BSRF),Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100190

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国家自然科学基金国家自然科学基金科技部项目

22033009221210022017YFA0403003

2023

10.31635/ccschem.022.202202068

中国化学会会刊(英文)

中国化学会会刊(英文)

CSCD
ISSN：
年,卷(期)：2023.5(1)
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