Direct evidence of oxidized gold on supported gold catalysts

L. Fu; N. Q. Wu; J. H. Yang; F. Qu; D. L. Johnson; M. C. Kung; H. H. Kung; V. P. Dravid

doi:10.1021/jp045117e

Direct evidence of oxidized gold on supported gold catalysts

L. Fu, N. Q. Wu, J. H. Yang, F. Qu, D. L. Johnson, M. C. Kung, H. H. Kung, V. P. Dravid^*

^*Corresponding author for this work

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

112 Scopus citations

Abstract

Supported gold catalysts have drawn worldwide interest due to the novel properties and potential applications in industries. However, the origin of the catalytic activity in gold nanoparticles is still not well understood. In this study, time-of-flight secondary ion mass spectroscopy (TOF-SIMS) has been applied to investigate the nature of gold in Au (1.3 wt %)/γ-Al ₂O ₃ and Au (2.8 wt %)/TiO ₂ catalysts prepared by the deposition-precipitation method. The SIMS spectrum of the supported gold catalysts presented AuO ^-, AuO ₂ ^-, and AuOH ^- ion clusters. These measurements show direct evidence for oxidized gold on supported gold catalysts and may be helpful to gaining better understanding of the origin of the catalytic activity.

Original language	English (US)
Pages (from-to)	3704-3706
Number of pages	3
Journal	Journal of Physical Chemistry B
Volume	109
Issue number	9
DOIs	https://doi.org/10.1021/jp045117e
State	Published - Mar 10 2005

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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abstract = "Supported gold catalysts have drawn worldwide interest due to the novel properties and potential applications in industries. However, the origin of the catalytic activity in gold nanoparticles is still not well understood. In this study, time-of-flight secondary ion mass spectroscopy (TOF-SIMS) has been applied to investigate the nature of gold in Au (1.3 wt %)/γ-Al 2O 3 and Au (2.8 wt %)/TiO 2 catalysts prepared by the deposition-precipitation method. The SIMS spectrum of the supported gold catalysts presented AuO -, AuO 2 -, and AuOH - ion clusters. These measurements show direct evidence for oxidized gold on supported gold catalysts and may be helpful to gaining better understanding of the origin of the catalytic activity.",

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T1 - Direct evidence of oxidized gold on supported gold catalysts

AU - Fu, L.

AU - Wu, N. Q.

AU - Yang, J. H.

AU - Qu, F.

AU - Johnson, D. L.

AU - Kung, M. C.

AU - Kung, H. H.

AU - Dravid, V. P.

PY - 2005/3/10

Y1 - 2005/3/10

N2 - Supported gold catalysts have drawn worldwide interest due to the novel properties and potential applications in industries. However, the origin of the catalytic activity in gold nanoparticles is still not well understood. In this study, time-of-flight secondary ion mass spectroscopy (TOF-SIMS) has been applied to investigate the nature of gold in Au (1.3 wt %)/γ-Al 2O 3 and Au (2.8 wt %)/TiO 2 catalysts prepared by the deposition-precipitation method. The SIMS spectrum of the supported gold catalysts presented AuO -, AuO 2 -, and AuOH - ion clusters. These measurements show direct evidence for oxidized gold on supported gold catalysts and may be helpful to gaining better understanding of the origin of the catalytic activity.

AB - Supported gold catalysts have drawn worldwide interest due to the novel properties and potential applications in industries. However, the origin of the catalytic activity in gold nanoparticles is still not well understood. In this study, time-of-flight secondary ion mass spectroscopy (TOF-SIMS) has been applied to investigate the nature of gold in Au (1.3 wt %)/γ-Al 2O 3 and Au (2.8 wt %)/TiO 2 catalysts prepared by the deposition-precipitation method. The SIMS spectrum of the supported gold catalysts presented AuO -, AuO 2 -, and AuOH - ion clusters. These measurements show direct evidence for oxidized gold on supported gold catalysts and may be helpful to gaining better understanding of the origin of the catalytic activity.

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Direct evidence of oxidized gold on supported gold catalysts

Abstract

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