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Noble metal ionic sites for catalytic hydrogen combustion: spectroscopic insights

Deshpande, Parag A and Madras, Giridhar (2011) Noble metal ionic sites for catalytic hydrogen combustion: spectroscopic insights. In: PCCP: Physical Chemistry Chemical Physics, 13 (2). pp. 708-718.

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A catalytic hydrogen combustion reaction was carried out over noble metal catalysts substituted in ZrO2 and TiO2 in ionic form. The catalysts were synthesized by the solution combustion technique. The compounds showed high activity and CO tolerance for the reaction. The activity of Pd and Pt ion substituted TiO2 was comparable and was higher than Pd and Pt ion substituted ZrO2. The mechanisms of the reaction over the two supports were proposed by making use of the X-ray photoelectron spectroscopy and FT infrared spectroscopic observations. The reaction over ZrO2 supported catalysts was proposed to take place by the utilization of the surface hydroxyl groups while the reaction over TiO2 supported catalysts was hypothesized to be a hybrid mechanism utilizing surface hydroxyl groups and the lattice oxygen.

Item Type: Journal Article
Publication: PCCP: Physical Chemistry Chemical Physics
Publisher: Royal Society of Chemistry
Additional Information: Copyright of this article belongs to Royal Society of Chemistry.
Department/Centre: Division of Mechanical Sciences > Chemical Engineering
Date Deposited: 31 Jan 2011 09:22
Last Modified: 31 Jan 2011 09:22
URI: http://eprints.iisc.ac.in/id/eprint/35302

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