文献类型：期刊文献

英文题名：Boosted Inner Surface Charge Transfer in Perovskite Nanodots@Mesoporous Titania Frameworks for Efficient and Selective Photocatalytic CO₂ Reduction to Methane

作者：Sun, Qi-Meng[1];Xu, Jing-Jing[2];Tao, Fei-Fei[2];Ye, Wen[3];Zhou, Chang[1];He, Jing-Hui[1];Lu, Jian-Mei[1]

机构：[1]Soochow Univ, Coll Chem Chem Engn & Mat Sci, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Natl United Engn Lab Functized Environm Adsorpt, Suzhou 215123, Peoples R China;[2]Shaoxing Univ, Dept Chem & Chem Engn, Shaoxing 312000, Zhejiang, Peoples R China;[3]Soochow Univ, State Key Lab Radiat Med & Protect, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Natl United Engn Lab Functized Environm Adsorpt, Suzhou 215123, Peoples R China

年份：2022

卷号：61

期号：20

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：SCI-EXPANDED(收录号：WOS:000770632500001)、、WOS

基金：We gratefully acknowledge the financial support provided by the National Key R&D Program of China (2020YFC1818401, 2017YFC0210906), National Natural Science Foundation of China (21938006, 21776190, 21978185), Basic Research Project of Leading Technology in Jiangsu Province (BK20202012), Suzhou Science and Technology Bureau Project (SYG201935) and the project supported by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

语种：英文

外文关键词：Charge Transfer; Focused Ion Beam (FIB); Perovskites; Photocatalysis; Photoreduction

外文摘要：Exploring high-efficiency and stable halide perovskite-based photocatalysts for the selective reduction of CO2 to methane is a challenge because of the intrinsic photo- and chemical instability of halide perovskites. In this study, halide perovskites (Cs3Bi2Br9 and Cs2AgBiBr6) were grown in situ in mesoporous TiO2 frameworks for an efficient CO2 reduction. Benchmarked CH4 production rates of 32.9 and 24.2 mu mol g(-1) h(-1). with selectivities of 88.7 % and 84.2%, were achieved, respectively, which are better than most reported halide perovskite photocatalysts. Focused ion-beam sliced-imaging techniques were used to directly image the hyperdispersed perovskite nanodots confined in mesopores with tunable sizes ranging from 3.8 to 9.9 nm. In situ X-ray photoelectronic spectroscopy and Kelvin probe force microscopy showed that the built-in electric field between the perovskite nanodots and mesoporous titania channels efficiently promoted photo-induced charge transfer. Density functional theory calculations indicate that the high methane selectivity was attributed to the Bi-adsorption-mediated hydrogenation of *CO to *HCO that dominates CO desorption.