文献类型：期刊文献

英文题名：Directly transforming copper (I) oxide bulk into isolated single-atom copper sites catalyst through gas-transport approach

作者：Yang, Zhengkun[1];Chen, Bingxu[2];Chen, Wenxing[3];Qu, Yunteng[1];Zhou, Fangyao[1];Zhao, Changming[1];Xu, Qian[4];Zhang, Qinghua[5];Duan, Xuezhi[2];Wu, Yuen[1,6]

机构：[1]Univ Sci & Technol China, Sch Chem & Mat Sci, Hefei Natl Lab Phys Sci Microscale, iChEM, Hefei 230026, Anhui, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Beijing Inst Technol, Sch Mat Sci & Engn, Beijing Key Lab Construct Tailorable Adv Funct Ma, Beijing 100081, Peoples R China;[4]NSRL, Hefei 230026, Anhui, Peoples R China;[5]Chinese Acad Sci, China Inst Phys, Beijing 100190, Peoples R China;[6]Chinese Acad Sci, Fujian Inst Innovat, Beijing, Peoples R China

年份：2019

卷号：10

外文期刊名：NATURE COMMUNICATIONS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000481607000004)】；

基金：This work was supported by National Key R&D Program of China 2017YFA (0208300) and (0700104), the National Natural Science Foundation of China (21522107, 21671180, and 21802132), China Postdoctoral Science Foundation (2018M632536) and Fundamental Research Funds for the Central Universities (WK2060190093). We thank the photoemission endstations BL1W1B in Beijing Synchrotron Radiation Facility (BSRF), BL14W1 in Shanghai Synchrotron Radiation Facility (SSRF), BL10B, and BL11U in National Synchrotron Radiation Laboratory (NSRL) for the help in characterizations.

语种：英文

摘要：Single-atom metal catalysts have sparked tremendous attention, but direct transformation of cheap and easily obtainable bulk metal oxide into single atoms is still a great challenge. Here we report a facile and versatile gas-transport strategy to synthesize isolated single-atom copper sites (Cu ISAS/NC) catalyst at gram levels. Commercial copper (I) oxide powder is sublimated as mobile vapor at nearly melting temperature (1500 K) and subsequently can be trapped and reduced by the defect-rich nitrogen-doped carbon (NC), forming the isolated copper sites catalyst. Strikingly, this thermally stable Cu ISAS/NC, which is obtained above 1270 K, delivers excellent oxygen reduction performance possessing a recorded half-wave potential of 0.92 V vs RHE among other Cu-based electrocatalysts. By varying metal oxide precursors, we demonstrate the universal synthesis of different metal single atoms anchored on NC materials (M ISAS/NC, where M refers to Mo and Sn). This strategy is readily scalable and the as-prepared sintering-resistant M ISAS/NC catalysts hold great potential in high-temperature applications.