CO hydrogenation reaction on sulfided molybdenum catalysts

Shi, Xue-Rong; Jiao, Haijun; Hermann, Klaus; Wang, Jianguo

doi:10.1016/j.molcata.2009.06.025

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CO hydrogenation reaction on sulfided molybdenum catalysts

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Shi, Xue-Rong
Theory, Fritz Haber Institute, Max Planck Society;

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Hermann, Klaus
Theory, Fritz Haber Institute, Max Planck Society;

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Citation

Shi, X.-R., Jiao, H., Hermann, K., & Wang, J. (2009). CO hydrogenation reaction on sulfided molybdenum catalysts. Journal of Molecular Catalysis A, 312(1-2), 7-17. doi:10.1016/j.molcata.2009.06.025.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0010-F8B8-A

Abstract

Adsorption of reaction intermediates appearing during CO hydrogenation at the sulfur covered MoS₂(1 0−1 0) surfaces, Mo-termination with 42% S coverage and S-termination with 50% S coverage, are investigated systematically using periodic density functional theory methods. Computed vibrational frequencies of all intermediates are compared with observed data from infrared (IR) spectroscopy allowing a detailed interpretation and assignment of the different features in the experimental spectra. The pathway for CO hydrogenation on both terminations has been studied in detail where the most likely reaction path involves C₁ type surface species in the sequence CO→CHO→CH₂O→CH₂OH→CH₂→CH₃→CH₄ in agreement with the experiment.