文献类型：期刊文献

英文题名：Collaborative influence of Ni single atoms and oxygen defects on Bi3O4Br for boosting light-driven CO2 hydrogenation to CH4

作者：Meng, Weidan[1,3];Sui, Xinyuan[2];Liu, Yu[1,3];He, Yiling[1,4];Yuan, Haiyang[2];Zhu, Xinxin[1];Zhou, Yanbo[1,4];Zhou, Yi[1,3,4]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Ind Wastewater Detoxicat & Resou, State Environm Protect Key Lab Environm Risk Asses, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Shanghai Engn Res Ctr Multimedia Environm Catalysi, 130 Meilong Rd, Shanghai 200237, Peoples R China;[4]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2025

卷号：366

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY

收录：;EI(收录号：20250217658366);WOS:【SCI-EXPANDED(收录号:WOS:001412520000001)】；

基金：This work was supported by the National Natural Science Foundation of China (No. 22376065) ; the Science and Technology Commission of Shanghai Municipality (No. 22ZR1418600) ; and Shanghai Municipal Science and Technology (No. 20DZ2250400) .

语种：英文

外文关键词：CO2 photoreduction; Single atom; Oxygen vacancies; Ni; Bi3O4Br

摘要：Photocatalytic CO2 reduction (CO2PR) holds significant potential for reducing carbon emissions and advancing clean energy solutions. However, the process is hindered by several challenges, including low product yield, poor selectivity, and catalyst deactivation, all of which limit its long-term viability. This study presents a novel nickel single atom (Ni SAs) anchored bismuth oxybromide nanocatalyst (1 % Ni SAs-Bi3O4Br). Upon solar irradiation, 1 % Ni SAs-Bi3O4Br in situ generates high concentrations of oxygen vacancies (O-VS), which form dual catalytic sites with adjacent Ni SAs. This defect self-regulation mechanism facilitates photo-induced reconstruction, where Ni SAs prevent the migration of oxygen species to the O-VS surface, thereby avoiding deactivation and ensuring long-term catalytic stability. Additionally, Ni SAs lower the activation energy for CO2, enhancing hydrogenation and significantly boosting methane yield and selectivity. After 4 h of irradiation, the methane yield reached 23.3 mu molg(-1) with 95 % selectivity. Furthermore, 1 % Ni SAs-Bi3O4Br also achieved 100 % selectivity for HCOOH from CO2 and NH3BH3 without a sacrificial agent, yielding 3632.6 mu molg(-1)h(-1). This study offers a novel approach for developing photo-induced reconstruction high-performance CO2PR catalysts, advancing the efficiency and selectivity of CO2PR reactions.