Preparation and reactivity of Rh nanoparticles on TiO2(110)-(1 × 2) surface

A. Berkó, Jnos Szokob, F. Solymosi

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Arrays of Rh nanoparticles with independently controlled sizes and average distances were prepared by exploiting the surface temperature-dependent kinetics of the Rh adatoms and nanocluster migration processes on TiO2(110)-(1 × 2) surface. The supported Rh nanoparticles fabricated in this way exhibit a very narrow size distribution. The characteristic particle diameter can be varied in the range of 2-20 nm with a desired interparticle distance tunable between 5 and 100 nm. The distribution and the morphology of the nanoparticles were characterized by scanning tunneling microscopy. The advantage of this method in comparison with lithography techniques is its relative simplicity and the possibility of the preparation of metal particles in the typical 'catalytic regime'. The model catalysts so produced are applicable in the study of size-dependent reactivity of the nanoparticles (gas-induced disruption, agglomeration, encapsulation, catalytic activity). It is also suggested that the tailored particle arrays can serve as templates for further nanostructural fabrication.

Original languageEnglish
Pages (from-to)197-202
Number of pages6
JournalSolid State Ionics
Volume141-142
DOIs
Publication statusPublished - May 1 2001

Fingerprint

reactivity
Nanoparticles
nanoparticles
preparation
Adatoms
Nanoclusters
metal particles
Scanning tunneling microscopy
agglomeration
nanoclusters
Encapsulation
Lithography
adatoms
surface temperature
catalytic activity
scanning tunneling microscopy
Catalyst activity
templates
Agglomeration
lithography

Keywords

  • Disruption and agglomeration of nanoparticles
  • Dissociation of CO
  • Rhodium grown on TiO(110)-(1 × 2) surface
  • Scanning tunneling microscopy (STM)
  • Spillover of carbon
  • Tailored growing of nanoparticle arrays

ASJC Scopus subject areas

  • Electrochemistry
  • Physical and Theoretical Chemistry
  • Energy Engineering and Power Technology
  • Materials Chemistry
  • Condensed Matter Physics

Cite this

Preparation and reactivity of Rh nanoparticles on TiO2(110)-(1 × 2) surface. / Berkó, A.; Szokob, Jnos; Solymosi, F.

In: Solid State Ionics, Vol. 141-142, 01.05.2001, p. 197-202.

Research output: Contribution to journalArticle

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