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Indexed by:期刊论文

Date of Publication:2011-11-30

Journal:CATALYSIS COMMUNICATIONS

Included Journals:Scopus、SCIE、EI

Volume:16

Issue:1

Page Number:11-14

ISSN No.:1566-7367

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

Abstract: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.