Journal
ACS NANO
Volume 13, Issue 6, Pages 6720-6729Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.9b01266
Keywords
electrochemical reaction; single molecule; molybdenum disulfide; hydrogen evolution; renewable energy
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Funding
- Ministry of Science and Technology (MOST) [108-3116-F-011-001-CC1, 106-2923-E 011-005, 105-3113-E-011-001, 105-ET-E-011-004-ET, 104-2923-M-011-002-MY3, 104-2911-1-011-505-MY2, 103-2221-E-011-156-MY3]
- Applied Research Center for Thin-Film Metallic Glass from the Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education of Taiwan
- Academia Sinica [AS-KPQ-106- DDPP]
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Designing a MoS2 catalyst having a large number of active sites and high site activity enables the catalytic activity toward the hydrogen evolution reaction to be improved. Herein, we report the synthesis of a low-cost and catalytically active immobilized single molecular molybdenum disulfide on carbonized polyacrylonitrile (MoS2-cPAN) electrocatalyst. From the extended X-ray absorption fine structure spectra analysis, we found that the as-prepared material has no metal-metal scattering and it resembles MoS, with a molecular state. Meanwhile, the size of the molecular MoS2 has been estimated to be about 1.31 nm by high-angle annular dark-field scanning transmission electron microscopy. A low coordination number and maximum utilization of the single molecular MoS2 surface enable MoS2-cPAN to demonstrate electrochemical performance significantly better than that of bulk MoS2 by two orders of exchange current density (j(o)) and turnover frequency to the hydrogen evolution.
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