Nondeactivating nanosized ionic catalysts for water-gas shift reaction / Sudhanshu Sharma in Industrial & engineering chemistry research, Vol. 48 N° 14 (Juillet 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N° 14 (Juillet 2009) . - pp. 6535–6543 Titre : Nondeactivating nanosized ionic catalysts for water-gas shift reaction Type de document : texte imprimé Auteurs : Sudhanshu Sharma, Auteur ; Parag A. Deshpande, Auteur ; M. S. Hegde, Auteur Année de publication : 2009 Article en page(s) : pp. 6535–6543 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Water-gas shift reaction Nanosized catalysts X-ray diffraction photoelectron spectroscopy Résumé : 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. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900335k [article] Nondeactivating nanosized ionic catalysts for water-gas shift reaction [texte imprimé] / Sudhanshu Sharma, Auteur ; Parag A. Deshpande, Auteur ; M. S. Hegde, Auteur . - 2009 . - pp. 6535–6543. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 14 (Juillet 2009) . - pp. 6535–6543 Mots-clés : Water-gas shift reaction Nanosized catalysts X-ray diffraction photoelectron spectroscopy Résumé : 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. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900335k

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