Tuning the Core–Shell Structure of Au144@Fe2O3 for Optimal Catalytic Activity for CO Oxidation

Michelle Lukosi; Chengcheng Tian; Xinyi Li; Shannon M. Mahurin; Harry M. Meyer; Guo Shiou Foo; Sheng Dai

doi:10.1007/s10562-018-2437-x

Tuning the Core–Shell Structure of Au₁₄₄@Fe₂O₃ for Optimal Catalytic Activity for CO Oxidation

Michelle Lukosi, Chengcheng Tian, Xinyi Li, Shannon M. Mahurin, Harry M. Meyer, Guo Shiou Foo, Sheng Dai

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

6 Scopus citations

Abstract

Core–shell heterostructures have been utilized as a catalyst that is thermally stable and exhibits a synergistic effect between core and shell, resulting in increased catalytic activity. Here we report on the synthetic procedure involving a Au₁₄₄ core with an iron oxide shell which can be varied in thickness. The Au₁₄₄@Fe₂O₃ particles with Au:Fe mass ratios of 1:2, 1:4, and 1:6 were synthesized and then deposited onto silica via colloidal deposition. Using CO oxidation, each Au₁₄₄@Fe₂O₃/SiO₂ catalyst gave varying degrees of full CO conversion depending on the thickness of the iron oxide layer. The 1:4 Au₁₄₄@Fe₂O₃/SiO₂ catalyst produced the best catalytic activity and was further investigated via thermal treatments, where calcination at 300 °C presented the best results, and the 1:4 ratio was still active at 100 °C after thermal treatments.

Original language	English
Pages (from-to)	2315-2324
Number of pages	10
Journal	Catalysis Letters
Volume	148
Issue number	8
DOIs	https://doi.org/10.1007/s10562-018-2437-x
State	Published - Aug 1 2018

Funding

Acknowledgements This work was supported by the U.S. Department of Energy, Office of Science, Chemical Sciences, Geosciences and Biosciences Division. Synthetic procedures were conducted at the Joint Institute of Advanced Materials at the University of Tennessee. XPS and FTIR data were acquired by Harry M. Meyer III and Guo Shiou Foo, respectively, at Oak Ridge National Laboratory. This work was supported by the U.S. Department of Energy, Office of Science, Chemical Sciences, Geosciences and Biosciences Division. Synthetic procedures were conducted at the Joint Institute of Advanced Materials at the University of Tennessee. XPS and FTIR data were acquired by Harry M. Meyer III and Guo Shiou Foo, respectively, at Oak Ridge National Laboratory.

Keywords

2-Propanol conversion
Au nanocluster
CO oxidation
Catalysis
Core–shell nanoparticles
Thermal treatment

Access to Document

10.1007/s10562-018-2437-x

Cite this

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title = "Tuning the Core–Shell Structure of Au144@Fe2O3 for Optimal Catalytic Activity for CO Oxidation",

abstract = "Core–shell heterostructures have been utilized as a catalyst that is thermally stable and exhibits a synergistic effect between core and shell, resulting in increased catalytic activity. Here we report on the synthetic procedure involving a Au144 core with an iron oxide shell which can be varied in thickness. The Au144@Fe2O3 particles with Au:Fe mass ratios of 1:2, 1:4, and 1:6 were synthesized and then deposited onto silica via colloidal deposition. Using CO oxidation, each Au144@Fe2O3/SiO2 catalyst gave varying degrees of full CO conversion depending on the thickness of the iron oxide layer. The 1:4 Au144@Fe2O3/SiO2 catalyst produced the best catalytic activity and was further investigated via thermal treatments, where calcination at 300 °C presented the best results, and the 1:4 ratio was still active at 100 °C after thermal treatments.",

keywords = "2-Propanol conversion, Au nanocluster, CO oxidation, Catalysis, Core–shell nanoparticles, Thermal treatment",

author = "Michelle Lukosi and Chengcheng Tian and Xinyi Li and Mahurin, {Shannon M.} and Meyer, {Harry M.} and Foo, {Guo Shiou} and Sheng Dai",

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