Title

Effect of interparticle interaction on the low temperature oxidation of CO over size-selected Au nanocatalysts supported on ultrathin TiC films

Authors

Authors

L. K. Ono;B. Roldan-Cuenya

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Catal. Lett.

Keywords

catalysis; Au nanoparticle; diblock copolymer; sintering; CO oxidation; interparticle interaction; size effects; XPS; TPD; AFM; ELECTRON-BEAM LITHOGRAPHY; MODEL CATALYSTS; SURFACE-DIFFUSION; GOLD; CATALYSTS; POLLUTION-ABATEMENT; BROWNIAN MIGRATION; CLUSTERS; NANOPARTICLES; METAL; PLATINUM; Chemistry, Physical

Abstract

This work aims to get insight into the influence of interparticle interactions on catalysis. The low temperature CO oxidation is used as a model reaction. A strong dependence of the catalytic activity and stability of gold nanoparticles uniformly dispersed on polycrystalline TiC films was observed as a function of the interparticle distance. Two samples with similar height distributions (similar to 2 nm), but with different average interparticle distances (similar to 30 and similar to 80 nm), were synthesized using diblock copolymer encapsulation. Their chemical reactivity was investigated by temperature programmed desorption (TPD), and reactive coarsening and subsequent deactivation was observed for the sample with the smallest interparticle distance. The system with the largest average interparticle distance showed higher stability towards agglomeration and longer lifetime.

Journal Title

Catalysis Letters

Volume

113

Issue/Number

3-4

Publication Date

1-1-2007

Document Type

Article

Language

English

First Page

86

Last Page

94

WOS Identifier

WOS:000245131000003

ISSN

1011-372X

Share

COinS