Kinetics of Concurrent Desorption and Diffusion into the Solid: D/Zr(0001) | Sciact - CRIS-system of Boreskov Institute of Catalysis

Kinetics of Concurrent Desorption and Diffusion into the Solid: D/Zr(0001) Full article

Journal

Journal of Chemical Physics
ISSN: 0021-9606 , E-ISSN: 1089-7690

Output data

Year: 1997, Volume: 106, Number: 11, Pages: 4797-4805 Pages count : 9 DOI: 10.1063/1.473478

Tags

HYDROGEN; ADSORPTION; ZIRCONIUM; TEMPERATURE; SEGREGATION; ZR(0001); NI(110)

Authors

Kovar M. ¹ , Griffiths K. ¹ , Kasza R.V. ¹ , Shapter J.G. ¹ , Norton P. ¹ , Zhdanov V.P. ^2,3

Affiliations

1	Interface Science Western, Department of Chemistry, University of Western Ontario, London, Ontario N6A 5B7, Canada
2	Department of Applied Physics, Chalmers University of Technology, S-412 96 Go¨teborg, Sweden
3	Boreskov Institute of Catalysis, Russian Academy of Sciences, Novosibirsk 630090, Russia

Rapid adsorbate diffusion into the solid is known to suppress the desorption yield measured in a thermal desorption experiment. We show that this suppression can be controlled (at least partly) by pulsed-laser heating at rates in excess of 10101010 K/s. As an example, we analyze the D/Zr system. In this case, deuterium adsorbed on a surface rapidly diffuses into the bulk of Zr with increasing temperature, and the deuterium desorption probability measured with conventional heating rates (β⩽100(β⩽100 K/s) is as low as ≈10−4≈10−4 for polycrystalline Zr foils (deuterium desorption is not observed at all from single-crystal Zr from which dissolved H/D has been removed). Heating the Zr(0001) surface by pulsed-laser thermal excitation with β≃1011β≃1011 K/s is demonstrated to result in the increase of the deuterium desorption probability up to approximately 0.01. To interpret this observation, general equations for describing associative desorption accompanied by adsorbate diffusion into the solid are simplified by employing the specifics of the temperature-programmed kinetic regimes with a linear increase of temperature. The desorption yield calculated without any adjustable parameters is in good agreement with the experimental results.

Kovar M. , Griffiths K. , Kasza R.V. , Shapter J.G. , Norton P. , Zhdanov V.P.
Kinetics of Concurrent Desorption and Diffusion into the Solid: D/Zr(0001)

Journal of Chemical Physics. 1997. V.106. N11. P.4797-4805. DOI: 10.1063/1.473478 WOS Scopus РИНЦ ANCAN OpenAlex

Full text from publisher

Submitted:	May 20, 1996
Accepted:	Dec 13, 1996
Published print:	Mar 15, 1997

Web of science:	WOS:A1997WM91000045
Scopus:	2-s2.0-0001589882
Elibrary:	13255427
Chemical Abstracts:	1997:188423
Chemical Abstracts (print):	126:321471
OpenAlex:	W2092850158

DB	Citing
Web of science	9
Scopus	9
Elibrary	9
OpenAlex	10