The stabilization of supported gold clusters by surface defects

W. T. Wallace; B. K. Min; D. W. Goodman

doi:10.1016/j.molcata.2004.09.085

The stabilization of supported gold clusters by surface defects

W. T. Wallace, B. K. Min, D. W. Goodman

GREEN SCHOOL (Graduate School of Energy and Environment)

Research output: Contribution to journal › Article › peer-review

87 Citations (Scopus)

Abstract

The chemical and electronic properties of surfaces to a large extent are controlled by defects. Defects facilitate the adsorption of gases and serve as reactive sites for chemical reactions. Furthermore, surface defects are a key to the nucleation, growth, and stability of metal clusters on metal oxide surfaces. This paper summarizes recent studies to assess the role of defects on Au cluster nucleation, growth, and stability on SiO₂ and mixed TiO_x-SiO₂ thin films. For a SiO₂ thin film, Au clusters sinter at elevated temperatures and pressures; however, introduction of defects on a SiO₂ surface as TiO_x islands or as substitutional Ti dramatically decreases the rate of Au cluster sintering.

Original language	English
Pages (from-to)	3-10
Number of pages	8
Journal	Journal of Molecular Catalysis A: Chemical
Volume	228
Issue number	1-2 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.molcata.2004.09.085
Publication status	Published - 2005 Mar 16

Bibliographical note

Funding Information:
We acknowledge with pleasure the support of this work by U.S. Department of Energy, Office of Basic Energy Science, Division of Chemical Sciences, U.S. Civilian Research & Development Foundation and the Texas Advanced Technology Program under Grant No. 010366-0022-2001.

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology
Physical and Theoretical Chemistry

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10.1016/j.molcata.2004.09.085

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title = "The stabilization of supported gold clusters by surface defects",

abstract = "The chemical and electronic properties of surfaces to a large extent are controlled by defects. Defects facilitate the adsorption of gases and serve as reactive sites for chemical reactions. Furthermore, surface defects are a key to the nucleation, growth, and stability of metal clusters on metal oxide surfaces. This paper summarizes recent studies to assess the role of defects on Au cluster nucleation, growth, and stability on SiO2 and mixed TiOx-SiO2 thin films. For a SiO2 thin film, Au clusters sinter at elevated temperatures and pressures; however, introduction of defects on a SiO2 surface as TiOx islands or as substitutional Ti dramatically decreases the rate of Au cluster sintering.",

author = "Wallace, {W. T.} and Min, {B. K.} and Goodman, {D. W.}",

note = "Funding Information: We acknowledge with pleasure the support of this work by U.S. Department of Energy, Office of Basic Energy Science, Division of Chemical Sciences, U.S. Civilian Research & Development Foundation and the Texas Advanced Technology Program under Grant No. 010366-0022-2001.",

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AU - Min, B. K.

AU - Goodman, D. W.

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AB - The chemical and electronic properties of surfaces to a large extent are controlled by defects. Defects facilitate the adsorption of gases and serve as reactive sites for chemical reactions. Furthermore, surface defects are a key to the nucleation, growth, and stability of metal clusters on metal oxide surfaces. This paper summarizes recent studies to assess the role of defects on Au cluster nucleation, growth, and stability on SiO2 and mixed TiOx-SiO2 thin films. For a SiO2 thin film, Au clusters sinter at elevated temperatures and pressures; however, introduction of defects on a SiO2 surface as TiOx islands or as substitutional Ti dramatically decreases the rate of Au cluster sintering.

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The stabilization of supported gold clusters by surface defects

Abstract

Bibliographical note

ASJC Scopus subject areas

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