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Title: High-density electrosorbed carbon monoxide monolayers on Pt(111) under atmospheric pressure.

Abstract

We report structure studies of high-density CO monolayers on Pt(111) surfaces in equilibrium with gaseous CO near atmospheric pressure, using surface x-ray scattering (SXS) and scanning tunneling microscopy (STM). We were able to stabilize extremely well-ordered CO monolayers by emersion transfer from an electrochemical cell. We found the hexagonal close-packed (2x2)-3CO structure at room temperature in {approx}1 atm CO gas pressure. We also confirm the ({radical}(19)x{radical}(19))-13CO structure previously proposed in STM studies. Based on SXS and STM measurements, a tentative phase diagram is proposed. Detailed SXS structure studies of the (2x2)-3CO structure suggest a surface structure and substrate reconstruction less symmetric than previously studies suggested. We also find that ({radical}(19)x{radical}(19))-13CO structure induces substrate reconstructions including the dimerization of Pt bonded to bridging CO and the rotation of the Pt cluster with atop CO.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
914918
Report Number(s):
ANL/MSD/JA-58379
Journal ID: ISSN 0163-1829; PRBMDO; TRN: US200817%%13
DOE Contract Number:
DE-AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Phys. Rev. B; Journal Volume: 75; Journal Issue: 2007
Country of Publication:
United States
Language:
ENGLISH
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ATMOSPHERIC PRESSURE; CARBON MONOXIDE; SORPTION; PLATINUM; SORPTIVE PROPERTIES; MORPHOLOGY; ELECTROCHEMICAL CELLS

Citation Formats

Menzel, A., Chang, K.-C., Komanicky, V., Tolmachev, Y. V., Tkachuk, A. V., Chu, Y. S., You, H., BESSY mbH, Kent State Univ., and Xradia Inc. High-density electrosorbed carbon monoxide monolayers on Pt(111) under atmospheric pressure.. United States: N. p., 2007. Web. doi:10.1103/PhysRevB.75.035426.
Menzel, A., Chang, K.-C., Komanicky, V., Tolmachev, Y. V., Tkachuk, A. V., Chu, Y. S., You, H., BESSY mbH, Kent State Univ., & Xradia Inc. High-density electrosorbed carbon monoxide monolayers on Pt(111) under atmospheric pressure.. United States. doi:10.1103/PhysRevB.75.035426.
Menzel, A., Chang, K.-C., Komanicky, V., Tolmachev, Y. V., Tkachuk, A. V., Chu, Y. S., You, H., BESSY mbH, Kent State Univ., and Xradia Inc. Mon . "High-density electrosorbed carbon monoxide monolayers on Pt(111) under atmospheric pressure.". United States. doi:10.1103/PhysRevB.75.035426.
@article{osti_914918,
title = {High-density electrosorbed carbon monoxide monolayers on Pt(111) under atmospheric pressure.},
author = {Menzel, A. and Chang, K.-C. and Komanicky, V. and Tolmachev, Y. V. and Tkachuk, A. V. and Chu, Y. S. and You, H. and BESSY mbH and Kent State Univ. and Xradia Inc.},
abstractNote = {We report structure studies of high-density CO monolayers on Pt(111) surfaces in equilibrium with gaseous CO near atmospheric pressure, using surface x-ray scattering (SXS) and scanning tunneling microscopy (STM). We were able to stabilize extremely well-ordered CO monolayers by emersion transfer from an electrochemical cell. We found the hexagonal close-packed (2x2)-3CO structure at room temperature in {approx}1 atm CO gas pressure. We also confirm the ({radical}(19)x{radical}(19))-13CO structure previously proposed in STM studies. Based on SXS and STM measurements, a tentative phase diagram is proposed. Detailed SXS structure studies of the (2x2)-3CO structure suggest a surface structure and substrate reconstruction less symmetric than previously studies suggested. We also find that ({radical}(19)x{radical}(19))-13CO structure induces substrate reconstructions including the dimerization of Pt bonded to bridging CO and the rotation of the Pt cluster with atop CO.},
doi = {10.1103/PhysRevB.75.035426},
journal = {Phys. Rev. B},
number = 2007,
volume = 75,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}