In situ infrared monitoring of hydrogen adsorption/desorption at a germanium electrode

F. Maroun; F. Ozanam; J. N. Chazalviel

doi:10.1016/S0039-6028(99)00262-9

In situ infrared monitoring of hydrogen adsorption/desorption at a germanium electrode

F. Maroun
, F. Ozanam
, J. N. Chazalviel

Research output: Contribution to journal › Conference article › peer-review

Abstract

Upon potential cycling in acidic electrolyte, the coverage of Ge electrodes can be changed from GeH to GeOH. In situ infrared spectroscopy reveals that hydrogen adsorbs and desorbs at Ge in mono- and dihydride configurations. Comparison of (111)- and (100)-oriented electrodes shows that the Ge surface is rough at the atomic scale and that this roughening takes place through (111) microfacetting. This facetting can account for the attenuated polarization dependence of the GeH absorption and its enhancement through local field effects. Finally, the band edge shifts which are observed upon hydrogen adsorption/desorption appear related to a change in the Ge surface charge rather than to a dipolar effect.

Original language	English
Pages (from-to)	184-189
Number of pages	6
Journal	Surface Science
Volume	427-428
DOIs	https://doi.org/10.1016/S0039-6028(99)00262-9
Publication status	Published - 1 Jun 1999
Event	Proceedings of the 1998 9th International Conference on Vibrations at Surfaces (VAS9) - Kanagawa-ken, Jpn Duration: 12 Oct 1998 → 16 Oct 1998

Access to Document

10.1016/S0039-6028(99)00262-9

Cite this

@article{60d221a6fd644365b027454af2e092c3,

title = "In situ infrared monitoring of hydrogen adsorption/desorption at a germanium electrode",

abstract = "Upon potential cycling in acidic electrolyte, the coverage of Ge electrodes can be changed from GeH to GeOH. In situ infrared spectroscopy reveals that hydrogen adsorbs and desorbs at Ge in mono- and dihydride configurations. Comparison of (111)- and (100)-oriented electrodes shows that the Ge surface is rough at the atomic scale and that this roughening takes place through (111) microfacetting. This facetting can account for the attenuated polarization dependence of the GeH absorption and its enhancement through local field effects. Finally, the band edge shifts which are observed upon hydrogen adsorption/desorption appear related to a change in the Ge surface charge rather than to a dipolar effect.",

author = "F. Maroun and F. Ozanam and Chazalviel, \{J. N.\}",

year = "1999",

month = jun,

day = "1",

doi = "10.1016/S0039-6028(99)00262-9",

language = "English",

volume = "427-428",

pages = "184--189",

journal = "Surface Science",

issn = "0039-6028",

note = "Proceedings of the 1998 9th International Conference on Vibrations at Surfaces (VAS9) ; Conference date: 12-10-1998 Through 16-10-1998",

}

TY - JOUR

T1 - In situ infrared monitoring of hydrogen adsorption/desorption at a germanium electrode

AU - Maroun, F.

AU - Ozanam, F.

AU - Chazalviel, J. N.

PY - 1999/6/1

Y1 - 1999/6/1

N2 - Upon potential cycling in acidic electrolyte, the coverage of Ge electrodes can be changed from GeH to GeOH. In situ infrared spectroscopy reveals that hydrogen adsorbs and desorbs at Ge in mono- and dihydride configurations. Comparison of (111)- and (100)-oriented electrodes shows that the Ge surface is rough at the atomic scale and that this roughening takes place through (111) microfacetting. This facetting can account for the attenuated polarization dependence of the GeH absorption and its enhancement through local field effects. Finally, the band edge shifts which are observed upon hydrogen adsorption/desorption appear related to a change in the Ge surface charge rather than to a dipolar effect.

AB - Upon potential cycling in acidic electrolyte, the coverage of Ge electrodes can be changed from GeH to GeOH. In situ infrared spectroscopy reveals that hydrogen adsorbs and desorbs at Ge in mono- and dihydride configurations. Comparison of (111)- and (100)-oriented electrodes shows that the Ge surface is rough at the atomic scale and that this roughening takes place through (111) microfacetting. This facetting can account for the attenuated polarization dependence of the GeH absorption and its enhancement through local field effects. Finally, the band edge shifts which are observed upon hydrogen adsorption/desorption appear related to a change in the Ge surface charge rather than to a dipolar effect.

U2 - 10.1016/S0039-6028(99)00262-9

DO - 10.1016/S0039-6028(99)00262-9

M3 - Conference article

AN - SCOPUS:0033148664

SN - 0039-6028

VL - 427-428

SP - 184

EP - 189

JO - Surface Science

JF - Surface Science

T2 - Proceedings of the 1998 9th International Conference on Vibrations at Surfaces (VAS9)

Y2 - 12 October 1998 through 16 October 1998

ER -

In situ infrared monitoring of hydrogen adsorption/desorption at a germanium electrode

Abstract

Access to Document

Fingerprint

Cite this