Synchronous activation of Ag nanoparticles and BiOBr for boosting solar-driven CO_(2)reduction  

作　　者：Gaopeng Liu Lin Wang Bin Wang Xingwang Zhu Jinman Yang Pengjun Liu Wenshuai Zhu Ziran Chen Jiexiang Xia 

机构地区：[1]Key Laboratory of Medicinal and Edible Plants Resources of Hainan Province,Hainan vocational university of Science and Technology,Haikou 571126,China [2]School of Chemistry and Chemical Engineering,Institute for Energy Research,Jiangsu University,Zhenjiang 212013,China [3]Department of Architecture and Environment Engineering,Sichuan Vocational and Technical College,Suining 629000,China

出　　处：《Chinese Chemical Letters》2023年第6期252-255,共4页中国化学快报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.22108106,21878134,21576123);China Postdoctoral Science Foundation(No.2020M680065);Hong Kong Scholar Program(No.XJ2021021);Key Laboratory of Electrochemical Energy Storage and Energy Conversion of Hainan Province(No.KFKT2021005)。

摘　　要：Artificial photosynthesis of valuable chemicals from CO_(2)is a potential way to achieve sustainable carbon cycle.The CO_(2)conversion activity is still inhibited by the sluggish charge kinetics and poor CO_(2)activation.Herein,Ag nanoparticles coupled Bi OBr have been constructed by in-situ photoreduction strategy.The crafting of interface between Ag nanoparticles and Bi OBr nanosheets,achieving an ultra-fast charge transfer.The Bi OBr semiconductor excited electrons and plasmonic Ag nanoparticles generated high-energy hot electrons synchronous accelerates the C=O double bond activation.Thus,the optimized Ag/BiOBr-2 heterostructure shows excellent CO_(2)photoreduction activity with CO production of 133.75 and 6.83μmol/g under 5 h of 300 W Xe lamp and visible light(λ>400 nm)irradiation,which is 1.51 and 2.81 folds versus the pristine Bi OBr,respectively.The mechanism of CO_(2)photoreduction was in-depth understood through in-situ FT-IR spectrum and density functional theory calculations.This study provides some new perspectives into efficient photocatalytic CO_(2)reduction.

关 键 词：Ag nanoparticles BiOBr Hot electrons Charge transfer CO_(2)photoreduction 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]