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Title: Experimental characterization of hydrogen adsorption sites for H/W(111) using low energy ion scattering

Journal Article · · Physical Review B
ORCiD logo [1];  [1]; ORCiD logo [2];  [3];  [1]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States)
  3. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Low energy ion scattering (LEIS) and direct recoil spectroscopy (DRS) are among the few experimental techniques that allow for the direct detection of hydrogen on a surface. Here, the interpretation of LEIS and DRS measurements, however, is often made difficult by complexities that can arise from complicated scattering processes. Previously, these complexities were successfully navigated to identify the exact binding configurations of hydrogen on a few surfaces using a simple channeling model for the projectile ion along the surface. For the W(111) surface structure, this simple channeling model breaks down due to the large lateral atomic spacing on the surface and small interlayer spacing. Instead, our observed hydrogen recoil signal can only be explained by considering not just channeling along the surface but also scattering from subsurface atoms. Using this more complete model, together with molecular dynamics (MD) simulations, we determine that hydrogen adsorbs to the bond-centered site for the W(111)+H(ads) system. Additional MD simulations were performed to further constrain the adsorption site to a height h = 1.0 ± 0.1 Å and a position dBC = 1.6 ± 0.1 Å along the bond between neighbors in first and second layers. Our determination of the hydrogen adsorption site is consistent with density functional theory simulation results in the literature.

Research Organization:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
Grant/Contract Number:
AC04-94AL85000; NA0003525; SC0006661; AC02-05CH11231; AC05-00OR22725
OSTI ID:
1581977
Report Number(s):
SAND-2019-14167J; PRBMDO; 681648; TRN: US2102084
Journal Information:
Physical Review B, Vol. 100, Issue 24; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

References (57)

Helium atom scattering spectroscopy of surface phonons: genesis and achievements journal January 1994
Kalypso: a software package for molecular dynamics simulation of atomic collisions at surfaces journal April 2005
Real space mapping of the surface atomic environment via low energy scattering spectroscopy journal July 1997
Application of multi-angle scattering maps to stepped surfaces journal November 2018
Hydrogen bonding in polymer blends. 1. FTIR studies of urethane-ether blends journal January 1988
Impact of combined hydrogen plasma and transient heat loads on the performance of tungsten as plasma facing material journal November 2015
Membrane separation technologies: their application to the fusion reactor fuel cycle journal April 1993
Sensitivity of pipelines with steel API X52 to hydrogen embrittlement journal December 2008
Hydrogen interactions with low-index surface orientations of tungsten journal April 2019
Real-space ion scattering maps of the Mg(0001) surface journal February 2009
Research status and issues of tungsten plasma facing materials for ITER and beyond journal October 2014
Surface structure of unreconstructed W(001) from alternative leed techniques journal September 1980
Recoil energy distribution of hydrogen isotopes adsorbed on tungsten journal March 2005
Influence of high flux hydrogen-plasma exposure on the thermal shock induced crack formation in tungsten journal January 2012
Quantitative Surface Atomic Geometry and Two-Dimensional Surface Electron Distribution Analysis by a New Technique in Low-Energy Ion Scattering journal November 1981
Tritium inventory in ITER plasma-facing materials and tritium removal procedures journal August 2008
Hydrogen-storage materials for mobile applications journal November 2001
Saturation of tungsten surfaces with hydrogen: A density functional theory study complemented by low energy ion scattering and direct recoil spectroscopy data journal February 2018
Adsorption of H2 on Ni(115): A helium diffraction study journal August 1986
Ab initiomolecular dynamics for liquid metals journal January 1993
Analysis of the interactions between He+ ions and transition metal surfaces using co-axial impact collision ion scattering spectroscopy journal January 2011
Further dynamical and experimental LEED results for a clean W<“001”-(1 × 1) surface structure determination journal November 1977
Binding States of Hydrogen on Tungsten journal June 1971
Channeling of low-energy ions on hydrogen-covered single-crystal surfaces journal March 2012
Low-energy ion scattering at surfaces journal May 1993
The role of palladium in a hydrogen economy journal June 2011
Scanning tunneling microscopy journal March 1983
Multilayer-relaxation geometry and electronic structure of a W(111) surface journal October 1993
Hydrogen in tungsten as plasma-facing material journal December 2011
Hydrogen interactions with quasicrystalline Al–Pd–Mn surfaces journal February 2006
Storage of hydrogen in single-walled carbon nanotubes journal March 1997
Methods for quantitative analysis in XPS and AES journal June 1989
Structural and electronic properties of the Ti/W(111) adsorption system journal August 2009
A simple representation for the angular dependence of scattered and recoil particle energies journal January 1988
Atomic beam diffraction from solid surfaces journal December 1998
Adatom Configurations of H(2×6) and H(2×1) on Ni(110) Analyzed Using He Diffraction journal September 1980
A helium atom scattering study of the H/NiAl(110) adsorption system journal July 2002
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Vibrational properties of the clean W(110) surface and of different hydrogen adsorbate phases studied by helium atom scattering journal January 1992
The determination of shadow cone dimensions for 0.5–5 keV Ar, Kr and Xe projectiles journal February 1993
The chemisorption of hydrogen on a (110) iron crystal studied by vibrational spectroscopy (EELS) journal December 1981
Blister formation on tungsten surface under low energy and high flux hydrogen plasma irradiation in NAGDIS-I journal March 2003
Hydrogen isotope retention and recycling in fusion reactor plasma-facing components journal February 2002
Investigation of hydrogen covered crystalline surfaces by low-energy ion-scattering and recoiling spectroscopy journal September 1997
Low-Energy Electron Diffraction book January 1986
Computer simulation of atomic-displacement cascades in solids in the binary-collision approximation journal June 1974
The coverage-dependent ordering of chemisorbed hydrogen on the (110) surface of nickel journal December 1985
Low-energy He + scattering from deuterium adsorbed on Pd(110) journal July 1989
Location of hydrogen adsorbed on palladium (111) studied by low-energy electron diffraction journal July 1989
Determination of the surface Debye temperature of Mo(112) using valence band photoemission journal August 1996
The chemisorption of hydrogen on a (110) iron crystal studied by vibrational spectroscopy (EELS) journal December 1981
Photoelectron and Auger Spectroscopy journal May 1976
Hydrogen-storage materials for mobile applications book October 2010
Surface structure of unreconstructed W(001) from alternative LEED techniques journal September 1980
Adsorption of H2 on Ni(115): A helium diffraction study journal August 1986
Scanning tunneling microscopy journal April 1985
Scanning tunneling microscopy journal January 2000