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Title: Enhancing Dissociative Adsorption of Water on Cu(111) via Chemisorbed Oxygen

Journal Article · · Journal of Physical Chemistry. C
 [1];  [2];  [3]; ORCiD logo [1]
  1. State Univ. of New York, Binghamton, NY (United States). Dept. of Mechanical Engineering & Materials Science and Engineering Program
  2. State Univ. of New York, Binghamton, NY (United States). Dept. of Physics, Applied Physics and Astronomy & Materials Science and Engineering Program
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)

We have used X-ray photoelectron spectroscopy to study the dehydrogenation of H2O molecules on the clean and oxygenated Cu(111) surfaces. The clean surface does not show reactivity toward H2O dehydrogenation. By contrast, H2O molecules on the oxygenated Cu(111) dissociate into OH species by reacting with chemisorbed oxygen until the complete consumption of the chemisorbed oxygen at which the surface loses its reactivity toward H2O dehydrogenation. Increasing the temperature to 200 °C and above decreases molecularly adsorbed H2O for dehydrogenation, thereby resulting in less loss of chemisorbed O. In conjunction with density-functional theory calculations, a three-step reaction pathway is proposed to account for the chemisorbed O assisted dehydrogenation of H2O molecules and the net loss of surface oxygen. Finally, these results provide insight into understanding the elemental steps of the dehydrogenation of H2O molecules and the controllable conditions for tuning H2O dissociation on metal surfaces.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704; CMMI- 1056611; CBET-1264940
OSTI ID:
1438301
Report Number(s):
BNL-205656-2018-JAAM; TRN: US1900415
Journal Information:
Journal of Physical Chemistry. C, Vol. 121, Issue 22; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 14 works
Citation information provided by
Web of Science

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Cited By (4)

Hydroxylation of ZnO/Cu(1 1 1) inverse catalysts under ambient water vapor and the water–gas shift reaction journal August 2019
Molecular Coverage Determines Sliding Wear Behavior of n-Octadecylphosphonic Acid Functionalized Cu–O Coated Steel Disks against Aluminum text January 2020
Surface-reaction induced structural oscillations in the subsurface journal January 2020
Molecular Coverage Determines Sliding Wear Behavior of n-Octadecylphosphonic Acid Functionalized Cu–O Coated Steel Disks against Aluminum journal January 2020

Figures / Tables (9)


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