Local pH change during diffusion-limited proton reduction determined by insitu infrared spectroscopy

Authors
Erne, BH Maroun, F Ozanam, F Chazalviel, JN
Citation
Bh. Erne et al., Local pH change during diffusion-limited proton reduction determined by insitu infrared spectroscopy, EL SOLID ST, 2(5), 1999, pp. 231-232
Citations number
12
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
ELECTROCHEMICAL AND SOLID STATE LETTERS
ISSN journal
10990062 → ACNP
Volume
2
Issue
5
Year of publication
1999
Pages
231 - 232
Database
ISI
SICI code
1099-0062(199905)2:5<231:LPCDDP>2.0.ZU;2-5
Abstract
Local pH change at n-GaAs cathodes was determined quantitatively by in situ infrared spectroscopy under conditions where diffusion of H-(aq(+)) toward the surface is rate limiting. A shift of the near-surface pH from 2 to mor e than 12 was evidenced by a change of the dominant phosphate species from H3PO4 and H2PO4- to HPO42- and PO43-. (C) 1999 The Electrochemical Society. S1099-0062(98)12-102-8. All rights reserved.