Enhancing the reactivity of gold: Nanostructured Au(111) adsorbs CO

Journal Article · Wed Dec 02 00:00:00 EST 2015 · Surface Science

DOI:https://doi.org/10.1016/j.susc.2015.11.021· OSTI ID:1303022

Hoffmann, F. M. ^[1]; Hrbek, J. ^[2]; Ma, S. ^[2]; Park, J. B. ^[2]; Rodriguez, J. A. ^[2]; Stacchiola, D. J. ^[2]; Senanayake, S. D. ^[2]

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1. Borough of Manhattan Community College, New York, NY (United States)
2. Brookhaven National Lab. (BNL), Upton, NY (United States)

Low-coordinated sites are surface defects whose presence can transform a surface of inert or noble metal such as Au into an active catalyst. Starting with a well-ordered Au(111) surface we prepared by ion sputtering gold surfaces modified by pits, used microscopy (STM) for their structural characterization and CO spectroscopy (IRAS and NEXAFS) for probing reactivity of surface defects. In contrast to the Au(111) surface CO adsorbs readily on the pitted surfaces bonding to low-coordinated sites identified as step atoms forming {111} and {100} microfacets. As a result, pitted nanostructured surfaces can serve as interesting and easily prepared models of catalytic surfaces with defined defects that offer an attractive alternative to vicinal surfaces or nanoparticles commonly employed in catalysis science.

• Research Organization: Brookhaven National Lab. (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• Grant/Contract Number: SC00112704; 11 DE-SC0012704
• OSTI ID: 1303022
• Alternate ID(s): OSTI ID: 1333202; OSTI ID: 1373615
• Report Number(s): BNL-112518-2016-JA; BNL-113207-2016-JA; R&D Project: CO009; KC0302010
• Journal Information: Surface Science, Vol. 650, Issue C; ISSN 0039-6028
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
CO adsorption
sputtered Au(111) surface
STM
IRAS
NEXAFS