A comprehensive study of catalytic, morphological and electronic properties of ligand-protected gold nanoclusters using XPS, STM, XAFS, and TPD techniques

Qiyuan Wu; Jiajie Cen; Yue Zhao; Xiao Tong; Yuanyuan Li; Anatoly I. Frenkel; Shen Zhao; Alexander Orlov

doi:10.1039/c7cp06376h

A comprehensive study of catalytic, morphological and electronic properties of ligand-protected gold nanoclusters using XPS, STM, XAFS, and TPD techniques

Qiyuan Wu, Jiajie Cen, Yue Zhao, Xiao Tong, Yuanyuan Li, Anatoly I. Frenkel, Shen Zhao, Alexander Orlov

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

6 Scopus citations

Abstract

Ultra-small gold nanoclusters were synthesized via a ligand exchange method and deposited onto different TiO₂ supports to study their properties. STM imaging revealed that the as-synthesized gold nanoclusters had 2-D morphology consisting of monolayers of gold atoms. Subsequent XPS, XAFS, and CO oxidation TPD results indicated that heat treatments of gold clusters at different temperatures significantly altered their electronic and catalytic properties due to ligand deprotection and cluster agglomeration.

Original language	English
Pages (from-to)	1497-1503
Number of pages	7
Journal	Physical Chemistry Chemical Physics
Volume	20
Issue number	3
DOIs	https://doi.org/10.1039/c7cp06376h
State	Published - 2018
Externally published	Yes

Funding

We acknowledge funding support from the National Science Foundation (#1254600). We acknowledge the support from the U.S. Department of Energy Grant No. DE-FG02-03ER15476 and Synchrotron Catalysis Consortium (U.S. Department of Energy, Office of Basic Energy Sciences, Grant No. DE-SC0012335). This research used resources of the Center for Functional Nano-materials, which is a U.S. DOE Office of Science Facility, at Brookhaven National Laboratory under Contract No. DE-SC0012704. We acknowledge funding support from the National Science Foundation (#1254600). We acknowledge the support from the U.S. Department of Energy Grant No. DE-FG02-03ER15476 and Synchrotron Catalysis Consortium (U.S. Department of Energy, Office of Basic Energy Sciences, Grant No. DE-SC0012335).

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abstract = "Ultra-small gold nanoclusters were synthesized via a ligand exchange method and deposited onto different TiO2 supports to study their properties. STM imaging revealed that the as-synthesized gold nanoclusters had 2-D morphology consisting of monolayers of gold atoms. Subsequent XPS, XAFS, and CO oxidation TPD results indicated that heat treatments of gold clusters at different temperatures significantly altered their electronic and catalytic properties due to ligand deprotection and cluster agglomeration.",

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AU - Wu, Qiyuan

AU - Cen, Jiajie

AU - Zhao, Yue

AU - Tong, Xiao

AU - Li, Yuanyuan

AU - Frenkel, Anatoly I.

AU - Zhao, Shen

AU - Orlov, Alexander

PY - 2018

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AB - Ultra-small gold nanoclusters were synthesized via a ligand exchange method and deposited onto different TiO2 supports to study their properties. STM imaging revealed that the as-synthesized gold nanoclusters had 2-D morphology consisting of monolayers of gold atoms. Subsequent XPS, XAFS, and CO oxidation TPD results indicated that heat treatments of gold clusters at different temperatures significantly altered their electronic and catalytic properties due to ligand deprotection and cluster agglomeration.

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A comprehensive study of catalytic, morphological and electronic properties of ligand-protected gold nanoclusters using XPS, STM, XAFS, and TPD techniques

Abstract

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