文献类型：期刊文献

英文题名：Pt Atomic Chain: Local Asymmetry One-Dimensional Array for Enhanced Electrochemical Reactions

作者：Chu, Tianshu[1,2,3];Zhu, Shuang[4];Zhang, Xuanning[1,2,3];Rong, Chao[1,2,3];Jia, Yanyan[5,6,7,8,9,10];Dai, Sheng[5,6,7,8,9,10];Xuan, Fu-Zhen[1,2,3];Zhu, Chongqin[4];Zhang, Bowei[1,2,3]

机构：[1]East China Univ Sci & Technol, Shanghai Key Lab Intelligent Sensing & Detect Tech, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai, Peoples R China;[3]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai, Peoples R China;[4]Beijing Normal Univ, Coll Chem, Key Lab Theoret & Computat Photochem, Minist Educ, Beijing, Peoples R China;[5]East China Univ Sci & Technol, Key Lab Adv Mat, Shanghai, Peoples R China;[6]East China Univ Sci & Technol, Joint Int Res Lab Precis Chem & Mol Engn, Shanghai, Peoples R China;[7]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Shanghai, Peoples R China;[8]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Shanghai, Peoples R China;[9]East China Univ Sci & Technol, Inst Fine Chem, Shanghai, Peoples R China;[10]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai, Peoples R China

年份：2026

外文期刊名：ADVANCED MATERIALS

收录：;EI(收录号：20261820633584);WOS:【SCI-EXPANDED(收录号:WOS:001753181000001)】；

基金：This work was supported by the National Natural Science Foundation of China (No. 52422505, No. 12274124, No. 22173011, No. 92477140), the Innovative Research Group Project of the National Natural Science Foundation of China (No. 52321002), the Shanghai Pilot Program for Basic Research (No. 22TQ1400100-6), the Fundamental Research Funds for the Central Universities, the National Key Research and Development Program of China (2024YFA1509600, 2021YFA1500700), and the Beijing Natural Science Foundation (Grant No. JQ24005). Additional support was provided by the Frontiers Science Center for Materiobiology and Dynamic Chemistry and the Feringa Nobel Prize Scientist Joint Research Center at the East China University of Science and Technology.

语种：英文

外文关键词：2D materials; hydrogen; sensing; single atom catalyst; synergy effects

摘要：Atomically dispersed arrays enhance the intrinsic catalysis activity of isolated atoms by synergistic effects. However, uneven charge distribution limits the formation of local asymmetric structures within the array, making it difficult to break the linear proportional relationship in complex multi-intermediate chemical reactions. Here, by creating ordered in-plane vacancies in the Mo1.33C surface to induce a looser lattice skeleton and then promoting the in situ substitution of Mo by Pt atoms, we report a locally asymmetric 1D sawtooth-shaped Pt atomic chain (Pt AC). The bridging sites within this asymmetric structure reduce the energy barriers for hydrolysis and intermediate adsorption, allowing Pt AC to show superior hydrogen evolution reaction (HER) activity (12.52 A mgPt -1) than isolated Pt single atoms (Pt SA, 1.32 A mgPt -1) and commercial Pt/C (0.18 A mgPt -1). In addition, the three-fold hollow sites in the asymmetric structure are prone to adsorb and oxidize dopamine (DA), which is key to triggering the high sensing performance of Pt AC. Pt AC has much higher sensitivity (0.1-1 & micro;m: 19.5 & micro;A & micro;M-1 and 1-100 & micro;m: 1.6 & micro;A & micro;M-1) compared to Pt SA. This work opens a door for the development of atomically dispersed arrays with asymmetric structures for surface chemistry applications.