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Title: Atomic and Molecular Adsorption on Ag(111)

Journal Article · · Journal of Physical Chemistry. C

The adsorption of atomic (H, C, N, O, S) and molecular (OH, CHx, NHx, CO, NO, CN, N2, HNO, NOH, HCN, x = 1–3) species at 1/4 monolayer coverage on an extended Ag(111) surface was studied here using periodic density functional theory. Geometries and energies were calculated self-consistently using the PW91 functional; nonself-consistent energies using the RPBE functional are also provided. We analyze the binding energies, binding geometries, estimated diffusion barriers, harmonic vibrational frequencies, and energetic and geometric deformation parameters of these adsorbates, comparing them to experimental and theoretical results whenever possible. PW91 gives binding energies that match experimental binding energies more closely than RPBE, which consistently predicts weaker binding than PW91. The data were then used to construct and analyze thermochemistry-only potential energy pathways for the hydrocarbon-assisted and hydrogen-assisted selective catalytic reduction (SCR) of nitric oxide (NO). These analyses provide preliminary insights into the possible mechanistic paths of the SCR of NO on Ag(111). Specifically, we show that deep dehydrogenation leading to the formation of atomic intermediates is not favored on Ag(111).

Research Organization:
Univ. of Wisconsin, Madison, WI (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
FG02-05ER15731; AC02-06CH11357; AC02-05CH11231
OSTI ID:
1494745
Journal Information:
Journal of Physical Chemistry. C, Vol. 123, Issue 13; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 35 works
Citation information provided by
Web of Science

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Cited By (2)

Study of odd–even effects in physisorption and chemisorption of Ar, N 2 , O 2 and NO on open shell Ag 11–13 + clusters by means of self-consistent van der Waals density functional calculations journal January 2019
Subsurface Carbon: A General Feature of Noble Metals journal January 2019

Figures / Tables (10)


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