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Activation energy of the reaction between hexacyanoferrate (ะจ) and thiosulfate ions catalyzed by platinum nanoparticles confined in nanometer space

Authors :
Li, Hongfang
Cao, Minna
Liu, Tianfu
Cao, Rong
Source :
Journal of Colloid & Interface Science. Mar2012, Vol. 369 Issue 1, p352-357. 6p.
Publication Year :
2012

Abstract

Abstract: Pt nanoparticles (NPs) have been successfully encapsulated in SBA-15 mesoporous silica support. The silica was firstly functionalized by polyaminoamine (PAMAM) dendrimers with various generations and provided different nanometer space for Pt NPs. The growth of Pt NPs is restricted by the double confinement effect of PAMAM dendrimers and SBA-15 mesopores. The Pt NPs can be precisely controlled to localize inter- or intradendrimeric within SBA-15 tunnels. The different pore structures of Gn-PAMAM-SBA-15 (Gn-PS15) support have great influence on the catalytic performance of the encapsulated Pt NPs. The blocking structure of higher generation Gn-PS15 support debased the catalytic performance and increased the activation energy of reaction between and in a certain degree. [Copyright &y& Elsevier]

Details

Language :
English
ISSN :
00219797
Volume :
369
Issue :
1
Database :
Academic Search Index
Journal :
Journal of Colloid & Interface Science
Publication Type :
Academic Journal
Accession number :
70946490
Full Text :
https://doi.org/10.1016/j.jcis.2011.11.069