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Title: CO-Induced Embedding of Pt Adatoms in a Partially Reduced FeOx Film on Pt(111)

Abstract

The reduction of a single-layer FeOfilmgrown on Pt(111) by CO at elevated pressures and temperatures has been studied through an interplay of scanning tunneling microscopy, ambient-pressure X-ray photoelectron spectroscopy, and density functional theory calculations. Exposure of the FeO thin film to CO at pressures between 1 and 30 Torr and temperatures between 500 and 530 K leads to formation of a honeycomb-structured Fe3O2 film with hollow sites occupied by single Pt atoms extracted from the substrate surface. The formation of these adatoms is driven by an increase in CO adsorption energy. In addition, the structure incorporates undercoordinated Fe centers, which are proposed to have substantial effects on the catalytic properties of the surface.

Authors:
; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
1053394
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Journal of the American Chemical Society, 133(28):10692–10695
Additional Journal Information:
Journal Name: Journal of the American Chemical Society, 133(28):10692–10695
Country of Publication:
United States
Language:
English
Subject:
Environmental Molecular Sciences Laboratory

Citation Formats

Merte, L. R., Knudsen, Jan, Eichhorn, Falk M., Porsgaard, Soeren, Zeuthen, Helene, Grabow, Lars C., Laegsgaard, E., Bluhm, Hendrik, Salmeron, Miquel B., Mavrikakis, Manos, and Besenbacher, Fleming. CO-Induced Embedding of Pt Adatoms in a Partially Reduced FeOx Film on Pt(111). United States: N. p., 2011. Web. doi:10.1021/ja2015923.
Merte, L. R., Knudsen, Jan, Eichhorn, Falk M., Porsgaard, Soeren, Zeuthen, Helene, Grabow, Lars C., Laegsgaard, E., Bluhm, Hendrik, Salmeron, Miquel B., Mavrikakis, Manos, & Besenbacher, Fleming. CO-Induced Embedding of Pt Adatoms in a Partially Reduced FeOx Film on Pt(111). United States. doi:10.1021/ja2015923.
Merte, L. R., Knudsen, Jan, Eichhorn, Falk M., Porsgaard, Soeren, Zeuthen, Helene, Grabow, Lars C., Laegsgaard, E., Bluhm, Hendrik, Salmeron, Miquel B., Mavrikakis, Manos, and Besenbacher, Fleming. Wed . "CO-Induced Embedding of Pt Adatoms in a Partially Reduced FeOx Film on Pt(111)". United States. doi:10.1021/ja2015923.
@article{osti_1053394,
title = {CO-Induced Embedding of Pt Adatoms in a Partially Reduced FeOx Film on Pt(111)},
author = {Merte, L. R. and Knudsen, Jan and Eichhorn, Falk M. and Porsgaard, Soeren and Zeuthen, Helene and Grabow, Lars C. and Laegsgaard, E. and Bluhm, Hendrik and Salmeron, Miquel B. and Mavrikakis, Manos and Besenbacher, Fleming},
abstractNote = {The reduction of a single-layer FeOfilmgrown on Pt(111) by CO at elevated pressures and temperatures has been studied through an interplay of scanning tunneling microscopy, ambient-pressure X-ray photoelectron spectroscopy, and density functional theory calculations. Exposure of the FeO thin film to CO at pressures between 1 and 30 Torr and temperatures between 500 and 530 K leads to formation of a honeycomb-structured Fe3O2 film with hollow sites occupied by single Pt atoms extracted from the substrate surface. The formation of these adatoms is driven by an increase in CO adsorption energy. In addition, the structure incorporates undercoordinated Fe centers, which are proposed to have substantial effects on the catalytic properties of the surface.},
doi = {10.1021/ja2015923},
journal = {Journal of the American Chemical Society, 133(28):10692–10695},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {7}
}