Bismuth clusters pinned on TiO_(2) porous nanowires boosting charge transfer for CO_(2) photoreduction to CH_(4)

作     者：Jiazhi Meng Kaiwen Wang Yang Wang Jiangping Ma Chaogang Ban Yajie Feng Bin Zhang Kai Zhou Liyong Gan Guang Han Danmei Yu Xiaoyuan Zhou 

作者机构：College of Physics and Institute of Advanced Interdisciplinary StudiesChongqing UniversityChongqing 401331China School of Chemistry and Chemical EngineeringChongqing UniversityChongqing 401331China College of Materials Science and EngineeringChongqing UniversityChongqing 400044China Beijing Key Lab of Microstructure and Properties of Advanced MaterialsBeijing University of TechnologyBeijing 100124China Analytical and Testing CenterChongqing UniversityChongqing 401331China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2024年第17卷第3期

页      面：1190-1198页

核心收录：

学科分类：07[理学] 070304[理学-物理化学(含∶化学物理)] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：supported in part by the National Natural Science Foundation of China(Nos.52125103,52071041 and 12074048) the Project for Fundamental and Frontier Research in Chongqing(Nos.cstc2020jcyj-msxmX0777 and cstc2020jcyj-msxmX0796). 

主　　题：carbon dioxide(CO_(2))photoreduction charge transfer tandem catalysis methanation 

摘      要：Artificial photosynthesis in carbon dioxide(CO_(2))conversion into value-added chemicals attracts considerable attention but suffers from the low activity induced by sluggish separation of photogenerated carriers and the kinetic bottleneck-induced unsatisfied selectivity.Herein,we prepare a new-style Bi/TiO_(2) catalyst formed by pinning bismuth clusters on TiO_(2) nanowires through being confined by pores,which exhibits high activity and selectivity towards photocatalytic production of CH_(4) from CO_(2).Boosted charge transfer from TiO_(2) through Bi to the reactants is revealed via in situ X-ray photon spectroscopy and time-resolved photoluminescence(PL).Further,in situ Fourier transform infrared results confirm that Bi/TiO_(2) not only overcomes the multi-electron kinetics challenge of CO_(2) to CH_(4) via boosting charge transfer,but also facilitates proton production and transfer as well as the intermediates*CHO and*CH_(3)O generation,ultimately achieving the tandem catalysis towards methanation.Theoretical calculation also underlies that the more favorable reaction step from*CO to*CHO on Bi/TiO_(2) results in CH_(4) production with higher selectivity.Our work brings new insights into rational design of photocatalysts with high performance and the formation mechanism of CO_(2) to CH_(4) for solar energy storage in future.