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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 [Vestergaard et al., Phys. Rev. Lett. 88, 259601 (2002)]. 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:
; ; ; ;  [1]; ;  [2]
  1. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
  2. Experimental Facilities Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
Publication Date:
OSTI Identifier:
20976663
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. B, Condensed Matter and Materials Physics; Journal Volume: 75; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevB.75.035426; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; ADSORPTION; ATMOSPHERIC PRESSURE; CARBON MONOXIDE; DENSITY; DIMERIZATION; ELECTROCHEMICAL CELLS; ELECTROCHEMISTRY; HCP LATTICES; LAYERS; PHASE DIAGRAMS; PLATINUM; SCANNING TUNNELING MICROSCOPY; SUBSTRATES; SURFACES; TEMPERATURE RANGE 0273-0400 K; X-RAY DIFFRACTION

Citation Formats

Menzel, A., Chang, K.-C., Komanicky, V., Tolmachev, Y. V., You, H., Tkachuk, A. V., and Chu, Y. S. 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., You, H., Tkachuk, A. V., & Chu, Y. S. 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., You, H., Tkachuk, A. V., and Chu, Y. S. Mon . "High-density electrosorbed carbon monoxide monolayers on Pt(111) under atmospheric pressure". United States. doi:10.1103/PHYSREVB.75.035426.
@article{osti_20976663,
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 You, H. and Tkachuk, A. V. and Chu, Y. S.},
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 [Vestergaard et al., Phys. Rev. Lett. 88, 259601 (2002)]. 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 = {Physical Review. B, Condensed Matter and Materials Physics},
number = 3,
volume = 75,
place = {United States},
year = {Mon Jan 15 00:00:00 EST 2007},
month = {Mon Jan 15 00:00:00 EST 2007}
}