Title

Effect Of Interparticle Interaction On The Low Temperature Oxidation Of Co Over Size-Selected Au Nanocatalysts Supported On Ultrathin Tic Films

Keywords

AFM; Au nanoparticle; Catalysis; CO oxidation; Diblock copolymer; Interparticle interaction; Sintering; Size effects; TPD; XPS

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 (∼2 nm), but with different average interparticle distances (∼30 and ∼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. © Springer Science+Business Media, LLC 2007.

Publication Date

2-1-2007

Publication Title

Catalysis Letters

Volume

113

Issue

3-4

Number of Pages

86-94

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1007/s10562-007-9027-7

Socpus ID

33947606318 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/33947606318

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