Der Sintermechanismus von hochdispersem Pt auf Al2O3 in Sauerstoff |
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| Authors: | H Lieske J Vlter |
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| Institution: | H. Lieske,J. Völter |
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| Abstract: | Mechanism of Sintering of Highly Dispersed Pt on Al2O3 in Oxygen Sintering of highly dispersed Pt on alumina in O2 consists in a slow thermal decomposition of a PtIV surface compound, followed by a fast coalescence of the highly mobile, zerovalent Pt, formed during the decomposition. Sintering according to this mechanism is inhibited by O2. The slower Ostwald ripening, promoted by O2, comes into effect only after complete decomposition of the PtIV surface compound. |
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