Modulation of oxygen vacancies and hot electrons promotes highly efficient CO_(2) photoreduction towards C_(2)H_(6)  

作　　者：Chengyang Zhu Hengming Huang Huiling Hu Jiaojiao Fang Junjie Mao 

机构地区：[1]Key Laboratory of Functional Molecular Solids,Ministry of Education,College of Chemistry and Materials Science,Anhui Normal University,Wuhu 241002,China [2]College of Materials Science and Engineering,State Key Laboratory of Materials-Orient Chemical Engineering,Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites,Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM),Nanjing Tech University,Nanjing 210009,China

出　　处：《Nano Research》2025年第4期90-97,共8页纳米研究(英文版)

基　　金：supported by the National Natural Science Foundation of China(Nos.22302002 and 22375006);the University Science Research Project of Anhui Province(Nos.2022AH050182 and 2022AH020020).

摘　　要：Efficient CO_(2) photoreduction towards C_(2+)solar fuels has emerged as one of the most promising strategies for alleviating the current energy and environment problems.However,the C-C coupling barriers and complex multi-electron transfer steps still limit the activity and selectivity of CO_(2)-to-C_(2) photoreduction.Herein,Au nanoparticles(NPs)modified CeO_(2) with oxygen vacancies(Au/CeO_(2)-VO)were reported for enhancing the CO_(2)-to-C_(2)H_(6) photoreduction performance.Au/CeO_(2)-VO achieved the high C_(2)H_(6) activity of 51.7μmol·g^(-1)·h^(-1),accompanied with C_(2)H_(6) selectivity up to 80% in the absence of sacrificial agent.Experimental results combined with theoretical simulation indicated that VO strengthened CO_(2) adsorption and activated*CO production,and plasmon-induced hot electrons from Au NPs to CeO_(2)-VO facilitated the*CO-*CO dimerization.The synergistic modulation of VO and hot electrons further decreased the energy barriers of C-C coupling and subsequent hydrogenation,resulting in the superior photoreduction performance.This work opens an avenue of developing plasmonic photocatalysts for multi-carbon products from CO_(2) photoreduction.

关 键 词：synergistic modulation oxygen vacancy hot electrons CO_(2)photoreduction C_(2)H_(6) 

分 类 号：O643.36[理学—物理化学] O643.3[理学—化学]