文献类型：期刊文献

英文题名：Atomic-level polarization in electric fields of defects for electrocatalysis

作者：Xu, Jie[1];Xue, Xiong-Xiong[2];Shao, Gonglei[3];Jing, Changfei[4];Dai, Sheng[4];He, Kun[1];Jia, Peipei[5];Wang, Shun[1];Yuan, Yifei[1];Luo, Jun[5];Lu, Jun[6,7]

机构：[1]Wenzhou Univ, Coll Chem & Mat Engn, Wenzhou 325035, Zhejiang, Peoples R China;[2]Xiangtan Univ, Sch Phys & Optoelect, Xiangtan 411105, Peoples R China;[3]Zhengzhou Univ, Interdisciplinary Res Ctr Sustainable Energy Sci &, Sch Chem Engn, Zhengzhou 450001, Peoples R China;[4]East China Univ Sci & Technol, Sch Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr, Shanghai 200237, Peoples R China;[5]Univ Elect Sci & Technol China, Shenzhen Inst Adv Study, ShenSi Lab, Shenzhen 518110, Peoples R China;[6]Zhejiang Univ, Coll Chem & Biol Engn, Hangzhou 310027, Peoples R China;[7]Quzhou Inst Power Battery & Grid Energy Storage, Quzhou 324000, Zhejiang, Peoples R China

年份：2023

卷号：14

期号：1

外文期刊名：NATURE COMMUNICATIONS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001111154200032)】；

基金：We acknowledge the financial support by the National Key R&D Program of China (2021YFA1202300), National Natural Science Foundation of China (52202373, 51971157, 22205209, 12104385), Natural Science Foundation of Jiangsu Province of China (BK20210729), Shenzhen Science and Technology Program (JCYJ20210324115412035, JCYJ20210324123202008, JCYJ20210324122803009, and ZDSYS20210813095534001), Guangdong Basic and Applied Basic Research Foundation (2021A1515110880), Henan Province Key Research and Promotion Project-Scientific and Technological Breakthroughs (232102230088). The computational resources were provided by the supercomputer TianHe-1 in Changsha, China.

语种：英文

摘要：The thriving field of atomic defect engineering towards advanced electrocatalysis relies on the critical role of electric field polarization at the atomic scale. While this is proposed theoretically, the spatial configuration, orientation, and correlation with specific catalytic properties of materials are yet to be understood. Here, by targeting monolayer MoS2 rich in atomic defects, we pioneer the direct visualization of electric field polarization of such atomic defects by combining advanced electron microscopy with differential phase contrast technology. It is revealed that the asymmetric charge distribution caused by the polarization facilitates the adsorption of H*, which originally activates the atomic defect sites for catalytic hydrogen evolution reaction (HER). Then, it has been experimentally proven that atomic-level polarization in electric fields can enhance catalytic HER activity. This work bridges the long-existing gap between the atomic defects and advanced electrocatalysis by directly revealing the angstrom-scale electric field polarization and correlating it with the as-tuned catalytic properties of materials; the methodology proposed here could also inspire future studies focusing on catalytic mechanism understanding and structure-property-performance relationship. The visible evidence bridging atomic defects with catalytic properties has been scarcely explored. Using differential phase contrast technology, this work discloses the existence of a polarized electric field surrounding the antisite defects of a monolayer MoS2 material and its correlation to its electrocatalytic hydrogen evolution property.