Sharma, Sudhanshu ; Deshpande, Parag A. ; Hegde, M. S. ; Madras, Giridhar (2009) Nondeactivating nanosized ionic catalysts for water-gas shift reaction Industrial & Engineering Chemistry Research, 48 (14). pp. 6535-6543. ISSN 0888-5885
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Official URL: http://pubs.acs.org/doi/abs/10.1021/ie900335k
Related URL: http://dx.doi.org/10.1021/ie900335k
Abstract
The water-gas shift reaction (WGS) is an important reaction to produce hydrogen. In this study, we have synthesized nanosized catalysts where Pt ion is substituted in the +2 state in TiO2, CeO2, and Ce1-xTixO2-δ. These catalysts have been characterized by X-ray diffraction and X-ray photoelectron spectroscopy (XPS), and it has been shown that Pt2+ in these reducible oxides result in solid solutions like Ti0.99Pt0.01O2-δ, Ce0.83Ti0.15Pt0.02O2-δ, and Ce0.98Pt0.02O2-δ. These catalysts were tested for the water gas shift reaction both in the presence and absence of hydrogen. It was shown that Ti0.99Pt0.01O2-δ exhibited higher catalytic activity than Ce0.83Ti0.15Pt0.02O2-δ and Ce0.98Pt0.02O2-δ. Further, experiments were conducted to determine the deactivation of these catalysts. There was no sintering of Pt and no carbonate formation; therefore, the catalyst did not deactivate even after prolonged reaction. There was no carbonate formation because of the highly acidic nature of Ti4+ ions in the catalysts.
Item Type: | Article |
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Source: | Copyright of this article belongs to American Chemical Society. |
ID Code: | 16300 |
Deposited On: | 15 Nov 2010 13:54 |
Last Modified: | 03 Jun 2011 07:12 |
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