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Title: Water dissociation on Mn(1×1)/Ag(100)

Journal Article · · Physical Chemistry Chemical Physics. PCCP (Print)
DOI:https://doi.org/10.1039/c6cp04115a· OSTI ID:1328380
 [1];  [2];  [3];  [4];  [1]
  1. Univ. of Delaware, Newark, DE (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Univ. di Milano-Bicocca, Milano (Italy)
  4. Univ. di Torino and NIS-Nanostructured Interfaces and Surfaces-Centre of Excellence Center, Torino (Italy)

In this work we utilize experimental and simulation techniques to examine the molecular level interaction of water with a MnO(1×1) thin film deposited onto Ag(100). The formation of MnO(1×1)/Ag(100) was characterized by low energy electron diffraction and scanning tunneling microscopy. Density functional theory (DFT) shows MnO(1×1) is thermodynamically more stable than MnO(2×1) by –0.4 eV per MnO. Upon exposure to 2.5 Torr water vapor at room temperature, X-ray photoemission spectroscopy results show extensive surface hydroxylation attributed to reactivity at MnO(1×1) terrace sites. DFT calculations of a water monomer on MnO(1×1)/Ag(100) show the dissociated form is energetically more favorable than molecular adsorption, with a hydroxylation activation barrier 0.4 eV per H2O. Lastly, these results are discussed and contrasted with previous studies of MgO/Ag(100) which show a stark difference in behavior for water dissociation.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC00112704
OSTI ID:
1328380
Report Number(s):
BNL-112689-2016-JA; PPCPFQ; KC0403020
Journal Information:
Physical Chemistry Chemical Physics. PCCP (Print), Vol. 18, Issue 36; ISSN 1463-9076
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 5 works
Citation information provided by
Web of Science

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