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http://www.springerlink.com/content/j72750p45k56021g/ PDF (1.5 MB)HTMLSupplemental Material Metal Phosphates as a New Class of Supports for Gold Nanocatalysts Zhen Ma1, Hongfeng Yin1, Steven H. Overbury1 and Sheng Dai1 (1) Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA Received: 5 August 2008 Accepted: 22 August 2008 Published online: 7 October 2008 Abstract Oxides and carbon are commonly used as supports for gold nanoparticles, but metal salts are barely considered as suitable supports. Our group recently communicated that gold nanoparticles supported on nanosized LaPO4 (6¨C8 nm) are active for CO oxidation (Yan et al., Angew Chem Int Ed 45:3614, 2006). In the current work, we systematically developed an array of Au/M¨CP¨CO catalysts and tested them for catalytic activity and stability. It was found that 200 ¡ãC-pretreated Au/M¨CP¨CO (M = Ca, Fe, Co, Y, La, Pr, Nd, Sm, Eu, Ho, Er) show high CO conversions below 50 ¡ãC, and 500 ¡ãC-pretreated Au/M¨CP¨CO (M = Ca, Y, La, Pr, Nd, Sm, Eu, Ho, Er) show high CO conversions below 100 ¡ãC. These samples were characterized by ICP-OES, BET, XRD, TEM, SEM, and H2-TPR. The stability of selected catalysts was studied as a function of time on stream. This work furnishes a new catalyst system for further fundamental and applied research. Electronic supplementary material The online version of this article (doi:10.1007/s10562-008-9627-x) contains supplementary material, which is available to authorized users. Keywords Gold catalysis - CO oxidation |
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