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论文类型：期刊论文

发表时间：2011-11-30

发表刊物：CATALYSIS COMMUNICATIONS

收录刊物：Scopus、SCIE、EI

卷号：16

期号：1

页面范围：11-14

ISSN号：1566-7367

关键字：Ag/SBA-15; pH-adjusting; CO oxidation; H(2)-TPR

摘要：The catalytic activity for CO oxidation over Ag/SBA-15 catalysts prepared by in-situ "pH-adjusting" method is studied in this paper. The prepared silver catalyst (7.8 wt%) under pH = 5 condition gives 98% of CO oxidation at 70 degrees C, as compared to 140 degrees C with conventional silver catalyst without pH adjusting (6.1 wt%). However, more Ag(2)O clusters are formed inside the channels with the further pH increasing, resulting in the low catalytic activity for CO oxidation. Therefore the pH value shows significant effect on the silver content and the species state, consequently affecting the catalytic activity of Ag/SBA-15 catalysts for CO oxidation. (C) 2011 Elsevier B.V. All rights reserved.