B. Chamnankid, K. Föttinger, G. Rupprechter, P. Kongkachuichay:
"Ni-CeO2-ZrO2 Catalysts for Water Gas Shift Reaction: Effect of CeO2 Contents and Reduction Temperature";
Journal of Nanoscience and Nanotechnology, 16 (2016), S. 12904 - 12909.

Kurzfassung englisch:
Ni-CeO2-ZrO2 catalysts with 5 wt% of Ni and different amounts of CeO2 were prepared by an
incipient wetness impregnation. The synthesized materials were tested for their activities for the
water gas shift reaction (WGS) which was carried out at 200-400 C with the reactants consisting
of 3% CO and 7% H2O. The effect of reduction temperatures (350, 400 and 500 C) and amount of
CeO2 (0-20 wt%) on the CO2 conversion were investigated. The prepared catalysts were characterized
their physical and chemical properties via X-ray Diffraction, N2 physisorption, H2 chemisorption
and in situ diffuse reflection infrared Fourier transform spectroscopy (DRIFTS). It was found that
the reduction temperature and loaded CeO2 content affected the surface area and dispersion of
metal. Moreover, based on DRIFTS study, the formate species were found to be the important intermediates
in the WGS reaction. The highest conversion of CO2 at 71% was achieved when using
Ni-CeO2-ZrO2 with 10% CeO2 reduced at 400 C.

WGS, Nickel, Cerium Oxide, Zirconium Oxide, Catalysts.

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