Influence of supported-metal characteristics on deNOx catalytic activity over Pt/CeO2
Influence of supported-metal characteristics on deNOx catalytic activity over Pt/CeO2
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DOI：
10.1016/j.molcata.2009.02.007
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发表时间：
2009-05-01
影响因子：
--
通讯作者：
Machida, Ken-ichi
中科院分区：
文献类型：
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作者：
Itoh, Masahiro;Saito, Makoto;Machida, Ken-ichi
采用初生湿法和溶剂热法在不同比表面积的CeO2载体上负载铂微粒，考察了它们对氢气还原NOx的催化性能。当使用高比表面积CeO2载体时，溶剂热法制备的催化剂比浸渍法制备的催化剂具有更高的活性。溶剂热法制备的CeO2载体和铂颗粒均未表现出良好的催化活性。然而，通过将铂颗粒与CeO2载体物理混合得到的催化剂具有较好的NOx转化率约80%和较高的N-2选择性(75%)。(C)2009爱思唯尔B.V.保留所有权利。
Fine Pt Particles were loaded on the CeO2 supports with various specific Surface areas by an incipient wetness method or a solvothermal one, and their catalytic properties for the NOx reduction by hydrogen were tested. The Pt/CeO2 catalysts prepared by the solvothermal method provided higher activity than those by the impregnation one when using the CeO2 support with high Surface area. Each CeO2 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 CeO2 supports gave excellent NOx conversion of ca. 80% with relative high N-2 selectivity (75%). (C) 2009 Elsevier B.V. All rights reserved.