Journal
JOURNAL OF RARE EARTHS
Volume 31, Issue 6, Pages 559-564Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S1002-0721(12)60320-2
Keywords
reverse water-gas shift reaction; nickel; CeO2; oxygen vacancy; rare earths
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Funding
- Foundation of Natural Science of Zhejiang Province [Y4110220]
- Foundation of the Zhejiang Provincial Department of Education [Y200908245]
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This study investigated 1 wt.% Ni-CeO2 catalysts that were prepared using co-precipitation, deposition-precipitation, and impregnation methods for the reverse water-gas shift (RWGS) reaction. Characterizations of the catalyst samples were conducted by Brumauer-Emmett-Teller (BET), atomic absorption spectrophotometer (AAS), X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HR-TEM) and temperature programmed reduction (TPR). The results showed that the Ni-CeO2 catalyst prepared using the co-precipitation method exhibited the best catalytic performance. In the Ni-CeO2 catalyst prepared using co-precipitation method, a combination of highly dispersed NiO and abundant oxygen vacancies was assumed to play a crucial role in determining the catalytic activity and selectivity of the RWGS reaction.
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