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strain-assisted Single Pt Sites on High-Curvature MoS_(2)Surface for Ultrasensitive H_(2)S Sensing

CCS Chemistry 2022年第12期4卷 3842-3851页

作者： Zhenggang Xue Chun Wang Yujing Tong Muyu Yan Jiangwei Zhang Xiao Han Xun Hong Yafei Li Yuen Wu NEST Laboratory Department of PhysicsDepartment of ChemistryCollege of ScienceShanghai UniversityShanghai 200444 Hefei National Laboratory for Physical Sciences at the Microscale Collaborative Innovation Center of Chemistry for Energy Materials(iChEM)School of Chemistry and Materials ScienceNational Synchrotron Radiation LaboratoryUniversity of Science and Technology of ChinaHefei 230026 Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials School of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023 Dalian National Laboratory for Clean Energy State Key Laboratory of CatalysisDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023 Dalian National Laboratory for Clean Energy Dalian 116023

Engineering the local three-dimensional structure of metal sites has an important effect of maximizing the activity and selectivity of single-atom site ***,we engineered a strain-assisted single Pt sites structure on a highly curved MoS_(2)surface to enhance its H_(2)S sensor *** introducing N-methyl-2-pyrrolidone(NMP)as guiding molecules,a multilayer MoS_(2)structure with bending base planes was *** bending behavior could inject not only uniform in-plane strain into the original inert MoS_(2)basal plane but also introduce sufficient accessible sites to anchor Pt *** experimental and theoretical results showed that the highcurvature MoS_(2)surface endowed 0.8%stretch strain onto the low-coordinated single Pt sites with a unique“tip”effect,which led to more accumulation of electrons around the Pt species,thereby accelerating the electric transfer process between H_(2)S and *** final catalyst delivered pronouncedly enhanced H_(2)S sensing response and response speed at room *** proposed strain-assisted strategy might create a new path to design highly active single-atom site catalysts for gas sensors.

关键词： strain-assisted strategy high-curvature Mo_(S)2 surface single-atom site catalysts H_(2)S sensors

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