Abstract
Fine Pt particles were loaded on the CeO 2 supports with various specific surface areas by an incipient wetness method or a solvothermal one, and their catalytic properties for the NO x reduction by hydrogen were tested. The Pt/CeO 2 catalysts prepared by the solvothermal method provided higher activity than those by the impregnation one when using the CeO 2 support with high surface area. Each CeO 2 supports and Pt particles prepared by the solvothermal method did not show the good catalytic activity singly. However the catalysts obtained by physically mixing Pt particles with the CeO 2 supports gave excellent NO x conversion of ca. 80% with relative high N 2 selectivity (75%).
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