Boosting the Activity and Stability of the Photoreduction of Diluted CO_(2) by Copper Oxide Decorated CeO_(2) Hetero-shells  

作　　者：XIAO Mingjiao LI Di WEI Yanze HE Yilei WANG Zumin YU Ranbo 

机构地区：[1]Department of Physical Chemistry,School of Metallurgical and Ecological Engineering,University of Science&Technology Bejing,Beijing 100083,P.R.China [2]State Key Laboratory of Biochemical Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,P.R.China [3]Key Laboratory of Biopharmaceutical Preparation and Delivery,Chinese Academy of Sciences,Beijing 100190,P.R.China

出　　处：《Chemical Research in Chinese Universities》2024年第3期513-520,共8页高等学校化学研究（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.51932001,52272097,and 52372170);the Beijing Natural Science Foundation,China(Nos.2242019 and 2232068);the National Key Research and Development Program of China(No.2018YFA0703503).

摘　　要：Inspired by the natural photosynthesis systems,the integrated harnessing and conversion of CO_(2) present a promising solution for addressing the ever-rising global atmospheric concentration of CO_(2).Hollow multi-shelled structured(HoMS)photocatalysts,featuring alternating shells and cavities,have recently gained recognition as efficient nano-reactors for capturing CO_(2) molecules and facilitating effective photoreduction within these hierarchical structures,leveraging the preeminent enrichment effect.In this work,to augment the photocatalytic efficacy of HoMS in CO_(2) treatment,highly dispersed Cu_(x)O nanoparticles(NPs)were incorporated on the CeO2 shells through a polymer-assisted impregnation method to create more active sites and strengthen the interaction between the hetero-shells and CO_(2) molecules.The photoreduction of the CO_(2)-to-CO rate under a diluted CO_(2)(15%,volume fraction)atmosphere is improved by the introduction of Cu_(x)O NPs,with the highest CO yielding rate reaching 120µmol·h^(−1)·g^(−1) without any sacrificial reagents.Further comparison experiments and theoretical calculations reveal that the Cu_(x)O NPs promote the adsorption of CO_(2) molecules in HoMS,accelerate the charge transfer efficiency,and stabilize the surface oxygen vacancies(Ovs)during the photoreduction CO_(2) conversion process.We hope these easy-to-prepare HoMS nanoreactors can contribute to the effective enrichment and valorization of CO_(2) in industrial exhaust gases.

关 键 词：Photoreduction CO_(2) Cu_(x)O/CeO_(2)hollow multi-shell structure(HoMS) Hetero-shell 

分 类 号：O64[理学—物理化学]