| 1 | Strain-Assisted Single Pt Sites on High-Curvature MoS_(2)Surface for Ultrasensitive H_(2)S Sensing显示文摘Engineering the local three-dimensional structure of metal sites has an important effect of maximizing the activity and selectivity of single-atom site catalysts.Here,we engineered a strain-assisted single Pt sites structure on a highly curved MoS_(2)surface to enhance its H_(2)S sensor property.By introducing N-methyl-2-pyrrolidone(NMP)as guiding molecules,a multilayer MoS_(2)structure with bending base planes was achieved.This 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 monomers.Further 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 supports.The final catalyst delivered pronouncedly enhanced H_(2)S sensing response and response speed at room temperature.Our proposed strain-assisted strategy might create a new path to design highly active single-atom site catalysts for gas sensors. | Zhenggang Xue Chun Wang Yujing Tong Muyu Yan Jiangwei Zhang Xiao Han Xun Hong Yafei Li Yuen Wu | 2022 | CCS Chemistry2022，4，12： | 0 |
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