Kuznetsov, V. / Lohstroh, W. / Rogalla, D. / Becker, H. W. / Strunskus, T. / Nefedov, A. / Kovacevic, E. / Traegerb, F. / Fouquet, P. (2021)

Phys. Chem. Chem. Phys., 2021,23, 7961-7973

Abstract

The diffusion of hydrogen adsorbed inside layered MoS2 crystals has been studied by means of quasi-elastic neutron scattering, neutron spin-echo spectroscopy, nuclear reaction analysis, and X-ray photoelectron spectroscopy. The neutron time-of-flight and neutron spin-echo measurements demonstrate fast diffusion of hydrogen molecules parallel to the basal planes of the two dimensional crystal planes. At room temperature and above, this intra-layer diffusion is of a similar speed to the surface diffusion that has been observed in earlier studies for hydrogen atoms on Pt surfaces. A significantly slower hydrogen diffusion was observed perpendicular to the basal planes using nuclear reaction analysis.

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