# Structure and dynamics investigations of a partially hydrogenated graphene/Ni(111) surface

Source: [Structure and dynamics investigations of a partially hydrogenated graphene/Ni(111) surface](<https://www.sota2.com/research/paper/68fa43291e209131ce907eab>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-25T04:10:12.354Z

Authors: Emanuel Bahn, Anton Tamt\\"ogl, John Ellis, William Allison, Peter Fouquet

Published: 2022-12-14T11:22:28.000Z

## Abstract

Using helium-3 atom scattering, we have studied the adsorption kinetics, the structure and the diffusional dynamics of atomic hydrogen on the surface of a graphene monolayer on Ni(111). Diffraction measurements reveal a 4$^\\circ$ rotated rectangular hydrogen overstructure. Hydrogen adsorption and desorption exhibit activation barriers of $E\_a=(89\\pm7)\\,$meV and $E\_d=(1.8\\pm0.2)\\,$eV, respectively. Helium-3 spin-echo measurements showed no decay of the spatial correlation function (or intermediate scattering function) within the time range of the spectrometer. Hence, we are able to set lower limits for a possible hydrogen surface diffusion rate.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/2212.07159>)

[PDF](<https://arxiv.org/pdf/2212.07159.pdf>)