Insights into the Electrochemical Polymerization of [Mo3S13]2? Generating Amorphous Molybdenum Sulfide |
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Authors: | Tuan M Duong Phuc D Nguyen Dr Anh D Nguyen Dr Ly T Le Dr Loan T Nguyen Dr Hai V Pham Dr Phong D Tran |
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Institution: | 1. University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam;2. Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam;3. Hanoi National University of Education, 136 Xuan Thuy, Hanoi, Vietnam |
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Abstract: | Amorphous molybdenum sulfide is an attractive electrode material for Li/Mg batteries and an efficient Pt-free catalyst for the hydrogen evolution reaction in water. By using the electrochemical quartz crystal microbalance (EQCM) analysis, new insights were gained into the electrochemical polymerization of the Mo3S13]2? cluster, which generates amorphous molybdenum sulfide thin films. In this work, it is shown that, at the anodic potential, a two-electron oxidative elimination of the terminal disulfide ligand within the Mo3S13]2? cluster induces the polymerization. A reductive elimination of the terminal disulfide ligand also occurs at the cathodic potential, inducing the polymerization. However, in sharp contrast to the anodic polymerization, according to which the film growth is rapid, the cathodic polymerization competes with the electrochemical reductive corrosion of the readily grown film, therefore occurring at a significant lower growth rate. |
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Keywords: | catalysis corrosion electrodeposition mechanism thin films |
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