文献类型：期刊文献

英文题名：Cu Nanoparticles Modified Step-Scheme Cu2O/WO3 Heterojunction Nanoflakes for Visible-Light-Driven Conversion of CO2 to CH4

作者：Shi, Weina[1];Wang, Ji-Chao[2,3];Chen, Aimin[1];Xu, Xin[1];Wang, Shuai[1];Li, Renlong[2];Zhang, Wanqing[2];Hou, Yuxia[2]

通讯作者：Wang, JC[1];Hou, YX[1];Wang, JC[2]

机构：[1]Xinxiang Univ, Sch Chem & Mat Engn, Xinxiang 453000, Henan, Peoples R China;[2]Henan Inst Sci & Technol, Coll Chem & Chem Engn, Xinxiang 453000, Henan, Peoples R China;[3]Zhengzhou Univ, Coll Chem, Zhengzhou 450000, Peoples R China

第一机构：新乡学院

通讯机构：[1]corresponding author), Henan Inst Sci & Technol, Coll Chem & Chem Engn, Xinxiang 453000, Henan, Peoples R China;[2]corresponding author), Zhengzhou Univ, Coll Chem, Zhengzhou 450000, Peoples R China.

年份：2022

卷号：12

期号：13

外文期刊名：NANOMATERIALS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000824161200001)】；

基金：This research was funded by the financial supports of National Natural Science Foundation of China (No. 51802082 and 51903073), Natural Science Foundation of Henan Province (No. 212300410221), Program for Science & Technology Innovation Talents in Universities of Henan Province (No. 21HATIT016), Key Scientific Research Project of Colleges and Universities in Henan Province (No. 21A430030), Key Scientific and Technological Project of Henan Province (No. 222102320100), National College Student Innovantion and Entrepreneurship Training (No. 202110467024) and "Climbing" Project of Henan Institute of Science and Technology (No. 2018CG04).

语种：英文

外文关键词：CO2 reduction; selectivity; Cu; Cu2O; WO3; photocatalysis; S-scheme

摘要：In this study, Cu and Cu2O hybrid nanoparticles were synthesized onto the WO3 nanoflake film using a one-step electrodeposition method. The critical advance is the use of a heterojunction consisting of WO3 flakes and Cu2O as an innovative stack design, thereby achieving excellent performance for CO2 photoreduction with water vapor under visible light irradiation. Notably, with the modified Cu nanoparticles, the selectivity of CH4 increased from nearly 0% to 96.7%, while that of CO fell down from 94.5% to 0%. The yields of CH4, H-2 and O-2 reached 2.43, 0.32 and 3.45 mmol/g(cat) after 24 h of visible light irradiation, respectively. The boosted photocatalytic performance primarily originated from effective charge-transfer in the heterojunction and acceleration of electron-proton transfer in the presence of Cu nanoparticles. The S-scheme charge transfer mode was further proposed by the in situ-XPS measurement. In this regard, the heterojunction construction showed great significance in the design of efficient catalysts for CO2 photoreduction application.