文献类型：期刊文献

英文题名：Regulating concentration of surface oxygen vacancies in Bi2MoO6/Bi-MOF for boosting photocatalytic ammonia synthesis

作者：Dong, Qibing[1];Li, Ximing[1];Sun, Jinhua[3];Zhu, Yiyin[1];Liang, Xinxin[1];Ren, Haitao[1];Labidi, Abdelkader[1];Wang, Dong[4,5];Li, Fei[1];Wang, Chuanyi[1,2]

机构：[1]Shaanxi Univ Sci & Technol, Sch Environm Sci & Engn, Xian 710021, Peoples R China;[2]Jiangxi Sci & Technol Normal Univ, Flexible Elect Innovat Inst, Jiangxi Key Lab Flexible Elect, Nanchang 330013, Jiangxi, Peoples R China;[3]Chalmers Univ Technol, Dept Ind & Mat Sci, Div Mat & Manufacture, S-41296 Gothenburg, Sweden;[4]East China Univ Sci & Technol, Ctr Computat Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[5]East China Univ Sci & Technol, Res Inst Ind Catalysis, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：433

外文期刊名：JOURNAL OF CATALYSIS

收录：;EI(收录号：20241715971078);WOS:【SCI-EXPANDED(收录号:WOS:001228875600001)】；

基金：This work was supported by the National Natural Science Foundation of China (52161145409, 21976116), SAFEA of China ("Belt and Road" Innovative Talent Exchange Foreign Expert Project #2023041004L) (High-end Foreign Expert Project #G2023041021L) , and Alexander-von-Humboldt Foundation of Germany (Group-Linkage Program) .

语种：英文

外文关键词：Bi2MoO6; Bi-MOF; Regulating OVs concentration; Photocatalytic; Ammonia synthesis

摘要：Surface oxygen vacancies (OVs) engineering has been widely adopted as an effective strategy to enhance photocatalytic performance. At present, photocatalytic systems capable of precisely regulating surface OVs concentrations, which could help illuminate the effects of the surface OVs concentration on N2 fixation activity, are still scarce. Herein, bismuth-based metal organic framework (Bi-MOF) was loaded onto the surface of Bi2MoO6 (BMO) as an operable platform, and the OVs concentration in the Bi-MOF component of BMO/Bi-MOF could be regulated by reduction of bismuth ions therein. Experimental results confirm that optimum construction of OVs in the Bi-MOF promotes the photoelectrons transfer from BMO to Bi-MOF, facilitating the activation of N2 at OVs. Consequently, the optimized catalyst shows superior performance in NH3 production, which reaches 125.78 mu mol h-1 g- 1, 21.4 higher than that of BMO. This work underline the significance of regulating surface OVs concentration, providing inspiration for the development of efficient OVs-modified photocatalysts.