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Title: Magnetron Sputtering of Gold Nanoparticles onto WO 3 and Activated Carbon

Abstract

In this paper we describe the production and investigation of two supported gold catalyst systems prepared by magnetron sputtering: Au on WO3 and Au on activated carbon. The magnetron sputtering technique entails the sputtering of a high purity gold metal target, with an argon plasma, to produce a flux of gold atoms onto a constantly tumbling support material. This technique offers a number of advantages over conventional chemical preparation methods including the flexibility to create gold nanoparticles (diameters < 3 nm) on unusual support materials, such as WO3 and carbon, which are generally not accessible using the ubiquitous deposition-precipitation technique. We present data demonstrating the formation of catalytic gold nanoparticles with average diameters of 1.7 nm (Au/C) and 2.1 nm (Au/WO3) as well as a substantial number of single atom species on the Au/C sample. Prototypical carbon monoxide oxidation (Au/WO3) and glycerol oxidation (Au/C) reactions were performed in order to gauge the activity of these catalysts. The WO3 supported catalyst exhibits substantial catalytic activity from room temperature to 135oC (0.0018 - 0.082 mole CO/mole Au sec) with an apparent transition around 75oC to a more active catalyst. The activity 1 of the Au/C catalysts was compared to a Au/C catalystsmore » prepared from a PVA sol. The smaller catalysts prepared by sputtering are more active than the large gold particles prepared using the PVA sol. However, the larger gold catalyst are substaintially more selective towards the production of intermediate products from the oxidation of glycerol.« less

Authors:
 [1];  [1];  [1];  [2];  [2];  [1]
  1. ORNL
  2. Universita di Milano, Italy
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
930784
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Catalysis Today
Additional Journal Information:
Journal Issue: 122; Journal ID: ISSN 0920-5861
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 77 NANOSCIENCE AND NANOTECHNOLOGY; ACTIVATED CARBON; TUNGSTEN OXIDES; SUBSTRATES; CARBON MONOXIDE; CATALYSTS; CHEMICAL PREPARATION; GOLD; MAGNETRONS; OXIDATION; SPUTTERING; NANOSTRUCTURES; GLYCEROL; CATALYTIC EFFECTS

Citation Formats

Veith, Gabriel M, Lupini, Andrew R, Pennycook, Stephen J, Villa, Alberto, Prati, Laura, and Dudney, Nancy J. Magnetron Sputtering of Gold Nanoparticles onto WO3 and Activated Carbon. United States: N. p., 2007. Web. doi:10.1016/j.cattod.2007.01.010.
Veith, Gabriel M, Lupini, Andrew R, Pennycook, Stephen J, Villa, Alberto, Prati, Laura, & Dudney, Nancy J. Magnetron Sputtering of Gold Nanoparticles onto WO3 and Activated Carbon. United States. https://doi.org/10.1016/j.cattod.2007.01.010
Veith, Gabriel M, Lupini, Andrew R, Pennycook, Stephen J, Villa, Alberto, Prati, Laura, and Dudney, Nancy J. Mon . "Magnetron Sputtering of Gold Nanoparticles onto WO3 and Activated Carbon". United States. https://doi.org/10.1016/j.cattod.2007.01.010.
@article{osti_930784,
title = {Magnetron Sputtering of Gold Nanoparticles onto WO3 and Activated Carbon},
author = {Veith, Gabriel M and Lupini, Andrew R and Pennycook, Stephen J and Villa, Alberto and Prati, Laura and Dudney, Nancy J},
abstractNote = {In this paper we describe the production and investigation of two supported gold catalyst systems prepared by magnetron sputtering: Au on WO3 and Au on activated carbon. The magnetron sputtering technique entails the sputtering of a high purity gold metal target, with an argon plasma, to produce a flux of gold atoms onto a constantly tumbling support material. This technique offers a number of advantages over conventional chemical preparation methods including the flexibility to create gold nanoparticles (diameters < 3 nm) on unusual support materials, such as WO3 and carbon, which are generally not accessible using the ubiquitous deposition-precipitation technique. We present data demonstrating the formation of catalytic gold nanoparticles with average diameters of 1.7 nm (Au/C) and 2.1 nm (Au/WO3) as well as a substantial number of single atom species on the Au/C sample. Prototypical carbon monoxide oxidation (Au/WO3) and glycerol oxidation (Au/C) reactions were performed in order to gauge the activity of these catalysts. The WO3 supported catalyst exhibits substantial catalytic activity from room temperature to 135oC (0.0018 - 0.082 mole CO/mole Au sec) with an apparent transition around 75oC to a more active catalyst. The activity 1 of the Au/C catalysts was compared to a Au/C catalysts prepared from a PVA sol. The smaller catalysts prepared by sputtering are more active than the large gold particles prepared using the PVA sol. However, the larger gold catalyst are substaintially more selective towards the production of intermediate products from the oxidation of glycerol.},
doi = {10.1016/j.cattod.2007.01.010},
url = {https://www.osti.gov/biblio/930784}, journal = {Catalysis Today},
issn = {0920-5861},
number = 122,
volume = ,
place = {United States},
year = {2007},
month = {1}
}