Water Adsorption on a-Fe2O3(0001) at Near Ambient Conditions Metadata

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Title

  • Main Title Water Adsorption on a-Fe2O3(0001) at Near Ambient Conditions

Creator

  • Author: Yamamoto, Susumu
    Creator Type: Personal

Contributor

  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization

Publisher

  • Name: SLAC National Accelerator Laboratory
    Place of Publication: United States
    Additional Info: SLAC National Accelerator Laboratory (SLAC)

Date

  • Creation: 2011-08-19

Language

  • English

Description

  • Content Description: We have investigated hydroxylation and water adsorption on {alpha}-Fe{sub 2}O{sub 3}(0001) at water vapor pressures up to 2 Torr and temperatures ranging from 277 to 647 K (relative humidity (RH) {le} 34%) using ambient-pressure X-ray photoelectron spectroscopy (XPS). Hydroxylation occurs at the very low RH of 1 x 10{sup -7} % and precedes the adsorption of molecular water. With increasing RH, the OH coverage increases up to one monolayer (ML) without any distinct threshold pressure. Depth profiling measurements showed that hydroxylation occurs only at the topmost surface under our experimental conditions. The onset of molecular water adsorption varies from {approx}2 x 10{sup -5} to {approx} 4 x 10{sup -2} % RH depending on sample temperature and water vapor pressure. The coverage of water reaches 1 ML at {approx}15% RH and increases to 1.5 ML at 34% RH.

Subject

  • Keyword: Water Vapor
  • Keyword: Hydroxylation
  • STI Subject Categories: 37 Inorganic, Organic, Physical And Analytical Chemistry
  • Keyword: Humidity
  • Keyword: Water
  • Keyword: Adsorption
  • Keyword: X-Ray Photoelectron Spectroscopy Chem
  • Keyword: Chem

Source

  • Journal Name: Submitted to Journal of Physical Chemistry C

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article

Format

  • Text

Identifier

  • Report No.: SLAC-PUB-13827
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 1022506
  • Archival Resource Key: ark:/67531/metadc831486

Note

  • Display Note: http://www.slac.stanford.edu/cgi-wrap/pubpage?slac-pub-13827.html