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Title: Tuning the Core–Shell Structure of Au 144@Fe 2O 3 for Optimal Catalytic Activity for CO Oxidation

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. We report on the synthetic procedure involving a Au 144 core with an iron oxide shell which can be varied in thickness. The Au 144@Fe 2O 3 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 Au 144@Fe 2O 3/SiO 2 catalyst gave varying degrees of full CO conversion depending on the thickness of the iron oxide layer. The 1:4 Au 144@Fe 2O 3/SiO 2 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.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [3] ;  [3] ;  [4]
  1. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Chemistry. Joint Inst. of Advanced Materials
  2. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Chemistry
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division
  4. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Chemistry. Joint Inst. of Advanced Materials; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Catalysis Letters
Additional Journal Information:
Journal Volume: 148; Journal Issue: 8; Journal ID: ISSN 1011-372X
Publisher:
Springer
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; catalysis; core-shell nanoparticles; Au144 nanocluster; CO oxidation; 2-propanol conversion; thermal treatment
OSTI Identifier:
1479717

Lukosi, Michelle, Tian, Chengcheng, Li, Xinyi, Mahurin, Shannon M., Meyer, Harry M., Foo, Guo Shiou, and Dai, Sheng. Tuning the Core–Shell Structure of Au144@Fe2O3 for Optimal Catalytic Activity for CO Oxidation. United States: N. p., Web. doi:10.1007/s10562-018-2437-x.
Lukosi, Michelle, Tian, Chengcheng, Li, Xinyi, Mahurin, Shannon M., Meyer, Harry M., Foo, Guo Shiou, & Dai, Sheng. Tuning the Core–Shell Structure of Au144@Fe2O3 for Optimal Catalytic Activity for CO Oxidation. United States. doi:10.1007/s10562-018-2437-x.
Lukosi, Michelle, Tian, Chengcheng, Li, Xinyi, Mahurin, Shannon M., Meyer, Harry M., Foo, Guo Shiou, and Dai, Sheng. 2018. "Tuning the Core–Shell Structure of Au144@Fe2O3 for Optimal Catalytic Activity for CO Oxidation". United States. doi:10.1007/s10562-018-2437-x.
@article{osti_1479717,
title = {Tuning the Core–Shell Structure of Au144@Fe2O3 for Optimal Catalytic Activity for CO Oxidation},
author = {Lukosi, Michelle and Tian, Chengcheng and Li, Xinyi and Mahurin, Shannon M. and Meyer, Harry M. and Foo, Guo Shiou and Dai, Sheng},
abstractNote = {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. 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.},
doi = {10.1007/s10562-018-2437-x},
journal = {Catalysis Letters},
number = 8,
volume = 148,
place = {United States},
year = {2018},
month = {6}
}

Works referenced in this record:

Gold/Iron Oxide Core/Hollow-Shell Nanoparticles
journal, November 2008
  • Shevchenko, Elena V.; Bodnarchuk, Maryna I.; Kovalenko, Maksym V.
  • Advanced Materials, Vol. 20, Issue 22, p. 4323-4329
  • DOI: 10.1002/adma.200702994

Catalysis of Gold Nanoparticles Deposited on Metal Oxides
journal, January 2002