BiO_(2-x)Nanosheets with Surface Electron Localizations for Efficient Electrocatalytic CO_(2)Reduction to Formate  

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

机构地区：[1]Beijing National Laboratory for Molecular Sciences,CAS Key Laboratory of Colloid,Interface and Chemical Thermodynamics,CAS Research/Education Center for Excellence in Molecular Sciences,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190 [2]School of Chemical Sciences,University of Chinese Academy of Sciences,Beijing 100190 [3]Key Laboratory of Photochemistry,Beijing National Laboratory for Molecular Sciences,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190 [4]Beijing Synchrotron Radiation Facility(BSRF),Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100190

出　　处：《CCS Chemistry》2023年第1期133-144,共12页中国化学会会刊（英文）

基　　金：This work was financially supported by the National Natural Science Foundation of China(grant nos.22033009 and 22121002);the Ministry of Science and Technology of China(grant no.2017YFA0403003).

摘　　要：To enhance the activity and selectivity of electrocatalytic CO_(2)reduction to formate is of great importance from both environmental and economical viewpoints.Herein,the BiO_(2-x)nanosheets with surface electron localizations were constructed and utilized for the efficient CO_(2)-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 BiO_(2-x)nanosheet favors OCHO*intermediate stabilization and suppresses H*intermediate adsorption,thus improving the CO_(2)-to-formate efficiency.The BiO_(2-x)electrocatalyst is nondopant,easily prepared,low-cost,highly active and selective for CO_(2)RR to formate,which has demonstrated potential for application in the Zn-CO_(2)battery.The maximum power density can reach 2.33 mW cm^(−2),and the charge/discharge cycling stability is>100 h(300 cycles)at 4.5 mA cm^(−2).

关 键 词：BiO_(2-x) electron localization CO_(2)electroreduction FORMATE Zn-CO_(2)battery 

分 类 号：O643[理学—物理化学]