Chloride-modified defective bismuth nanosheets providing a local proton for enhanced CO_(2) reductionOA
Proton affinity or transfer is crucial in determining the activity and selectivity of the electroreduction of CO_(2).However,optimizing proton supply during CO_(2) reduction while simultaneously enhancing the activity of catalytic sites and inhibiting hydrogen evolution poses a significant challenge.In this work,we report a rapid strategy for preparing Cl^(-) modified Bi nanosheets by decorating the defective sites of Bi nanosheets with abundant Cl^(-),permitting systematical study on how Cl^(-) impact on the catalytic activity of defective Bi sites and the proton transfer during CO_(2) reduction process.It is demonstrated that rich Cl^(-) sites around defective Bi sites could form Cl-H species during catalytic process(as confirmed by operando spectroscopy)and function as unique proton relay stations for the reaction intermediate,significantly accelerating the conversion of CO_(2)-to-formate.The resulting Cl^(-) modified Bi nanosheets achieve nearly 100%formate Faradaic efficiency(FE)at 400 mA/cm^(2) and high formate FEs(>90%)across 100 to 700 mA/cm^(2),as well as a long-term stability over 130 h in acidic electrolyte,much superior than those of Bi catalysts without Cl^(-) modification.This work provides new guidance for designing advanced electrocatalysts for CO_(2) electroreduction.
Cui Gao;Hong-Juan Wang;Shi Tao;Chao Zhang;Xiu-Li Lu;Tong-Bu Lu
Institute for New Energy Materials and Low Carbon Technologies,School of Materials Science and Engineering,Tianjin University of Technology,Tianjin 300384,ChinaInstitute for New Energy Materials and Low Carbon Technologies,School of Materials Science and Engineering,Tianjin University of Technology,Tianjin 300384,ChinaSchool of Electronic and Information Engineering,Jiangsu Laboratory of Advanced Functional Materials,Changshu Institute of Technology,Changshu 215500,ChinaInstitute for New Energy Materials and Low Carbon Technologies,School of Materials Science and Engineering,Tianjin University of Technology,Tianjin 300384,ChinaInstitute for New Energy Materials and Low Carbon Technologies,School of Materials Science and Engineering,Tianjin University of Technology,Tianjin 300384,ChinaInstitute for New Energy Materials and Low Carbon Technologies,School of Materials Science and Engineering,Tianjin University of Technology,Tianjin 300384,China
资源环境
CO_(2)electroreductionCl^(-)modified Bi nanosheetacidic electrolyteunique proton relay stationsformate
《Nano Research》 2026 (2)
P.104-112,9
supported by the National Natural Science Foundation of China(Nos.21931007 and 21805207)the National Key R&D Program of China(No.2022YFA1502902)Natural Science Foundation of the Jiangsu Higher Education Institutions(No.23KJA430001)Natural Science Foundation of Tianjin City(No.23JCQNJC00570).
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