文献类型：期刊文献

英文题名：Room-Temperature Synthesis of Single Iron Site by Electrofiltration for Photoreduction of CO2 into Tunable Syngas

作者：Wang, Zhiyuan[1,3];Yang, Jia[3];Cao, Junbo[2];Chen, Wenxing[4];Wang, Gang[2];Liao, Fan[3];Zhou, Xiao[3];Zhou, Fangyao[3];Li, Ruilong[3];Yu, Zhen-Qiang[1];Zhang, Guoqing[3];Duan, Xuezhi[2];Wu, Yuen[3]

机构：[1]Shenzhen Univ, Sch Chem & Environm Engn, Shenzhen 518060, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[3]Univ Sci & Technol China, Sch Chem & Mat Sci, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China;[4]Beijing Inst Technol, Sch Mat Sci & Engn, Beijing Key Lab Construct Tailorable Adv Funct Ma, Beijing 100081, Peoples R China

年份：2020

卷号：14

期号：5

起止页码：6164

外文期刊名：ACS NANO

收录：;EI(收录号：20202308796595);WOS:【SCI-EXPANDED(收录号:WOS:000537682300099)】；

基金：This work was financially supported by National Natural Science Foundation of China (21522107, 21671180), National Key R&D Program of China (2017YFA0208300, 2017YFA0700104), and State Key Laboratory of Organic Inorganic Composites (oic-201801007). The authors acknowledge photoemission endstations BL14W1 of Shanghai Synchrotron Radiation Facility and photoemission endstations BL1W1B of Beijing Synchrotron Radiation Facility for providing EXAFS measurements. The authors also acknowledge photoemission endstations BL10B and BL11U of Hefei National Synchrotron Radiation Laboratory for NEXAFS and synchrotron radiation photoemission spectroscopy measurements.

语种：英文

外文关键词：electrofiltration; graphene oxide membrane; single-atom catalysts; carbon dioxide photoreduction; tunable syngas

摘要：Developing a convenient and effective method to prepare single-atom catalysts at mild synthetic conditions remains a challenging task. Herein, a voltage-gauged electrofiltration method was demonstrated to synthesize single-atom site catalysts at room temperature. Under regulation of the graphene oxide membrane, a bulk Fe plate was directly converted into Fe single atoms, and the diffusion rate of Fe ions was greatly reduced, resulting in an ultralow concentration of Fe2+ around the working electrode, which successfully prevented the growing of nuclei and aggregating of metal atoms. Monatomic Fe atoms are homogeneously anchored on the as-prepared nitrogen-doped carbon. Owing to the fast photoelectron injection from photosensitizers to atomically dispersed Fe sites through the highly conductive supported N-C, the Fe-SAs/N-C exhibits an outstanding photocatalytic activity toward CO2 aqueous reduction into syngas with a tunable CO/H-2 ratio under visible light irradiation. The gas evolution rates for CO and H-2 are 4500 and 4950 mu mol g(-1) h(-1), respectively, and the tunable CO/H-2 ratio is from 0.3 to 8.8. This article presents an efficient strategy to develop the single-atom site catalysts and bridges the gap between heterogeneous and homogeneous catalysts toward photocatalytic CO2 aqueous reduction into syngas.