Oxygen Vacancy-Rich Sr_2MgSi_2O_7:Eu~(2+),Dy~(3+) Long Afterglow Phosphor as a Round-the-Clock Catalyst for Selective Reduction of CO_2 to CO

Lang Pei; Zhanfeng Ma; Jiasong ZhongWeirong LiXin WenJunjie GuoPeizhi LiuZhenhua ZhangQinan MaoJian ZhangShicheng YanZhigang Zou

首页> 外文期刊>Advanced functional materials >Oxygen Vacancy-Rich Sr_2MgSi_2O_7:Eu~(2+),Dy~(3+) Long Afterglow Phosphor as a Round-the-Clock Catalyst for Selective Reduction of CO_2 to CO

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Oxygen Vacancy-Rich Sr_2MgSi_2O_7:Eu~(2+),Dy~(3+) Long Afterglow Phosphor as a Round-the-Clock Catalyst for Selective Reduction of CO_2 to CO

机译：Oxygen Vacancy-Rich Sr_2MgSi_2O_7:Eu~(2+),Dy~(3+) Long Afterglow Phosphor as a Round-the-Clock Catalyst for Selective Reduction of CO_2 to CO

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Solar-driven CO_2 conversion to fuels is a central technique for closing theanthropogenic carbon cycle, but to date is limited by the intermittent solar flux.To face this challenge, a catalyst is needed that can work well in both light anddark. Here, surface oxygen vacancies are created in a Sr_2MgSi_2O_7:Eu~(2+),Dy~(3+)long-afterglow phosphor with long-time and high charge storage capacity(denoted as Vo-SMSED) as both electron transfer station and active sitesfor molecule activation. The strong ability for oxygen vacancies to store andextract electrons from charge storage centers enables the Vo-SMSED to workefficiently in both light and dark. As a result, Vo-SMSED manifests nearly 100%selectivity for catalyzing CO_2 reduction by H2O to CO with high light stabilityand over 3 h dark activity. These results demonstrate that creating the bifunctionalsites as electron-storing/extracting and molecule-activating center is anefficient route to change the long-lived charge into the highly active species forcatalysis, thus making the long-afterglow phosphors with high charge storagecapacity a highly efficient round-the-clock photocatalyst.

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来源
《Advanced functional materials》 |2022年第49期|2208565.1-2208565.10|共10页
作者
Lang Pei; Zhanfeng Ma; Jiasong ZhongWeirong LiXin WenJunjie GuoPeizhi LiuZhenhua ZhangQinan MaoJian ZhangShicheng YanZhigang Zou;
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作者单位

College of Materials and Environmental EngineeringHangzhou Dianzi UniversityHangzhou 310018, China;

Guangxi Key Laboratory of Information MaterialsGuangxi Collaborative Innovation Center of Structure and Propertyfor New Energy and MaterialsSchool of Materials Science and EngineeringGuilin University of Electronic TechnologyGuilin 541004, China;

Key Laboratory of Interface Science and Engineeringin Advanced MaterialsMinistry of EducationTaiyuan University of TechnologyTaiyuan 030024, ChinaEco-materials and Renewable Energy Research Center (ERERC)Collaborative Innovation Center of Advanced MicrostructuresCollege of Engineering and Applied SciencesNanjing UniversityNo. 22, Hankou Road, Nanjing, Jiangsu 210093, China;

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charge storage; CO_2 reductions; oxygen vacancies; photocatalyses; round-the-clock catalysts; Sr_2MgSi_2O_7:Eu~(2+); Dy~(3+);

Oxygen Vacancy-Rich Sr_2MgSi_2O_7:Eu~(2+),Dy~(3+) Long Afterglow Phosphor as a Round-the-Clock Catalyst for Selective Reduction of CO_2 to CO

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