期刊
TOPICS IN CATALYSIS
卷 61, 期 1-2, 页码 20-27出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s11244-017-0864-3
关键词
Gas-phase ion chemistry; Molybdenum cluster; Dimethyl disulfide; Sulfidation
资金
- Klima- und Energiefonds [853639]
- Lise Meitner Programme of the Austrian Science Fund (FWF) [M2001-NBL]
- University of Innsbruck
- Medical University of Innsbruck
Molybdenum sulfide is a potent hydrogen evolution catalyst, and is discussed as a replacement of platinum in large-scale electrochemical hydrogen production. To learn more about the elementary steps of MoS2 production by sputtering in the presence of dimethyl disulfide (DMDS), the reactions of Mo-x(+), x = 1-3, with DMDS are studied by Fourier transform ion cyclotron resonance mass spectrometry and density functional theory calculations. A rich variety of products composed of molybdenum, sulfur, carbon and hydrogen was observed. MoxSy+ species are formed in the first reaction step, together with products containing carbon and hydrogen. The calculations indicate that the strong Mo-S bonds are formed preferentially, followed by Mo-C bonds. Hydrogen is exclusively bound to carbon atoms, i.e. no insertion of a molybdenum atom into a C-H bond is observed. The reactions are efficient and highly exothermic, explaining the rich chemistry observed in the experiment.
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