MoOx-promoted Pt catalysts for the water gas shift reaction at low temperatures

doi:10.1016/S1872-2067(14)60294-1

Abstract

Abstract:

Pt-Mo/SiO₂ catalysts were prepared using impregnation-reduction methods. Mo-promoted Pt catalysts exhibit much higher water gas shift reaction activity at low temperatures than Pt/SiO₂ catalysts. Various characterization methods including inductive coupled plasma atomic emission spectrometry, X-ray diffraction, transmission electron microscopy, X-ray absorption near edge spectrum, and X-ray photoelectron spectroscopy were applied to investigate the composition, structure and chemical state of the Pt-Mo/SiO₂ catalysts. Our results indicate that the added Mo species effectively improves the dispersion of Pt nanoparticles and the synergistic effect between the Pt nanoparticles and surface MoO_x species enhances the catalytic performance for the water gas shift reaction. Pt nanoparticles decorated with highly dispersed MoO_x patches are found to be the active architecture.

Key words: Water gas shift reaction, Platinum, Molybdenum oxide, Synergistic effect, Interface catalysis

Xuejun Xu, Qiang Fu, Xinhe Bao. MoO_x-promoted Pt catalysts for the water gas shift reaction at low temperatures[J]. Chinese Journal of Catalysis, 2015, 36(5): 750-756.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(14)60294-1

https://www.cjcatal.com/EN/Y2015/V36/I5/750

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MoO_x-promoted Pt catalysts for the water gas shift reaction at low temperatures

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