New insights into the size and support effects of γ-Al2O3supported Au catalysts for HCHO oxidation at room temperature

Bingbing Chen; Qi Zhao; Limei Yu; Ling Chen; Mark Crocker; Chuan Shi

doi:10.1039/d0cy00857e

New insights into the size and support effects of γ-Al₂O₃supported Au catalysts for HCHO oxidation at room temperature

Bingbing Chen, Qi Zhao, Limei Yu, Ling Chen, Mark Crocker, Chuan Shi

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

14 Scopus citations

Abstract

Strong metal support interaction (SMSI) between Au nanoparticles (NPs) and a non-reducible γ-Al2O3 support was revealed to affect HCHO oxidation at room temperature. Catalyst characterization by HRTEM and 27Al NMR revealed that Au NPs were encapsulated by the γ-Al2O3 support and that pentacoordinate Al3+ ions on the γ-Al2O3 surface acted as anchoring sites for Au nanoparticles. The SMSI in Au/γ-Al2O3 not only enhanced the dispersion of the Au NPs but also stabilized the NPs during the reaction. As a result, Au/γ-Al2O3 with strong SMSI exhibited high initial activity and stability in HCHO oxidation at room temperature. These findings provide new insights into the Au NP size and support effects of Au/γ-Al2O3 catalysts used for HCHO oxidation at room temperature.

Original language	English
Pages (from-to)	4571-4579
Number of pages	9
Journal	Catalysis Science and Technology
Volume	10
Issue number	14
DOIs	https://doi.org/10.1039/d0cy00857e
State	Published - Jul 21 2020

Bibliographical note

Publisher Copyright:
© 2020 The Royal Society of Chemistry.

ASJC Scopus subject areas

Catalysis

Access to Document

10.1039/d0cy00857e

Cite this

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title = "New insights into the size and support effects of γ-Al2O3supported Au catalysts for HCHO oxidation at room temperature",

abstract = "Strong metal support interaction (SMSI) between Au nanoparticles (NPs) and a non-reducible γ-Al2O3 support was revealed to affect HCHO oxidation at room temperature. Catalyst characterization by HRTEM and 27Al NMR revealed that Au NPs were encapsulated by the γ-Al2O3 support and that pentacoordinate Al3+ ions on the γ-Al2O3 surface acted as anchoring sites for Au nanoparticles. The SMSI in Au/γ-Al2O3 not only enhanced the dispersion of the Au NPs but also stabilized the NPs during the reaction. As a result, Au/γ-Al2O3 with strong SMSI exhibited high initial activity and stability in HCHO oxidation at room temperature. These findings provide new insights into the Au NP size and support effects of Au/γ-Al2O3 catalysts used for HCHO oxidation at room temperature.",

author = "Bingbing Chen and Qi Zhao and Limei Yu and Ling Chen and Mark Crocker and Chuan Shi",

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T1 - New insights into the size and support effects of γ-Al2O3supported Au catalysts for HCHO oxidation at room temperature

AU - Chen, Bingbing

AU - Zhao, Qi

AU - Yu, Limei

AU - Chen, Ling

AU - Crocker, Mark

AU - Shi, Chuan

PY - 2020/7/21

Y1 - 2020/7/21

N2 - Strong metal support interaction (SMSI) between Au nanoparticles (NPs) and a non-reducible γ-Al2O3 support was revealed to affect HCHO oxidation at room temperature. Catalyst characterization by HRTEM and 27Al NMR revealed that Au NPs were encapsulated by the γ-Al2O3 support and that pentacoordinate Al3+ ions on the γ-Al2O3 surface acted as anchoring sites for Au nanoparticles. The SMSI in Au/γ-Al2O3 not only enhanced the dispersion of the Au NPs but also stabilized the NPs during the reaction. As a result, Au/γ-Al2O3 with strong SMSI exhibited high initial activity and stability in HCHO oxidation at room temperature. These findings provide new insights into the Au NP size and support effects of Au/γ-Al2O3 catalysts used for HCHO oxidation at room temperature.

AB - Strong metal support interaction (SMSI) between Au nanoparticles (NPs) and a non-reducible γ-Al2O3 support was revealed to affect HCHO oxidation at room temperature. Catalyst characterization by HRTEM and 27Al NMR revealed that Au NPs were encapsulated by the γ-Al2O3 support and that pentacoordinate Al3+ ions on the γ-Al2O3 surface acted as anchoring sites for Au nanoparticles. The SMSI in Au/γ-Al2O3 not only enhanced the dispersion of the Au NPs but also stabilized the NPs during the reaction. As a result, Au/γ-Al2O3 with strong SMSI exhibited high initial activity and stability in HCHO oxidation at room temperature. These findings provide new insights into the Au NP size and support effects of Au/γ-Al2O3 catalysts used for HCHO oxidation at room temperature.

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