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In-Situ Fourier Transform Infrared Spectroscopy Study on CO Oxidation Over Au/Titanate and Au/Titania Nanocatalysts

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Surface charge state and surface hydroxyl coverage of the catalyst support were reported to have great impact on the CO catalytic oxidation activity. Protonic layered titanate nanotubes are featured with cation-vacancy defects and full surface Ti-OH group coverage, whereas titania nanoparticles are featured with anion-vacancy defects and partly Ti-OH surface group coverage. In order to explore the influence on the activity from these differences, Fourier transform infrared spectra study of CO adsorption and oxidation over the Au/titanate and Au/titania catalysts is performed and the results indicate that (i) both Au/titanate and Au/titania have strong adsorption for CO molecules, and (ii) the Au/titania sample has a higher reactive activity for CO oxidation than the Au/titanate sample. This phenomenon is reasonably explained combining with a traditional strong metal-support interaction theory known in CO catalytic oxidation reactions.
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Document Type: Research Article

Publication date: February 1, 2009

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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