ACS applied materials & interfaces, volume 12, issue 46, pages 51530-51536

Photocorrosion of ZnO Single Crystals during Electrochemical Water Splitting

Publication typeJournal Article
Publication date2020-11-09
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor9.5
ISSN19448244, 19448252
General Materials Science
Abstract
Degradation and dissolution of transparent semiconducting oxides is central to various areas, including design of catalysts and catalysis conditions, as well as passivation of metal surfaces. In particular, photocorrosion can be significant and plays a central role during photoelectrochemical activity of transparent semiconducting oxides. Here, we utilize an electrochemical flow cell combined with an inductively coupled plasma mass spectrometer (ICP-MS) to enable the in situ study of the time-resolved release of zinc into solution under simultaneous radiation of UV-light. With this system we study the dissolution of zinc oxide single crystals with (0001) and (101̅0) orientations. At acidic and alkaline pH, we characterized potential dependent dissolution rates into both the oxygen and the hydrogen evolving conditions. A significant influence of the UV radiation and the pH of the electrolyte was observed. The observed dissolution behavior agrees well with the surface chemistry and stabilization mechanism of ZnO surfaces. In particular, polar ZnO(0001) shows ideal stability at low potentials and under hydrogen evolution conditions. Whereas ZnO(101̅0) sustains higher dissolution rates, while it is inactive for water splitting. Our data demonstrates that surface design and fundamental understanding of surface chemistry provides an effective path to rendering electroactive surfaces stable under operating conditions.

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Dworschak D., Brunnhofer C., Valtiner M. Photocorrosion of ZnO Single Crystals during Electrochemical Water Splitting // ACS applied materials & interfaces. 2020. Vol. 12. No. 46. pp. 51530-51536.
GOST all authors (up to 50) Copy
Dworschak D., Brunnhofer C., Valtiner M. Photocorrosion of ZnO Single Crystals during Electrochemical Water Splitting // ACS applied materials & interfaces. 2020. Vol. 12. No. 46. pp. 51530-51536.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1021/acsami.0c15508
UR - https://doi.org/10.1021/acsami.0c15508
TI - Photocorrosion of ZnO Single Crystals during Electrochemical Water Splitting
T2 - ACS applied materials & interfaces
AU - Brunnhofer, Carina
AU - Dworschak, Dominik
AU - Valtiner, Markus
PY - 2020
DA - 2020/11/09 00:00:00
PB - American Chemical Society (ACS)
SP - 51530-51536
IS - 46
VL - 12
SN - 1944-8244
SN - 1944-8252
ER -
BibTex |
Cite this
BibTex Copy
@article{2020_Dworschak,
author = {Carina Brunnhofer and Dominik Dworschak and Markus Valtiner},
title = {Photocorrosion of ZnO Single Crystals during Electrochemical Water Splitting},
journal = {ACS applied materials & interfaces},
year = {2020},
volume = {12},
publisher = {American Chemical Society (ACS)},
month = {nov},
url = {https://doi.org/10.1021/acsami.0c15508},
number = {46},
pages = {51530--51536},
doi = {10.1021/acsami.0c15508}
}
MLA
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MLA Copy
Dworschak, Dominik, et al. “Photocorrosion of ZnO Single Crystals during Electrochemical Water Splitting.” ACS applied materials & interfaces, vol. 12, no. 46, Nov. 2020, pp. 51530-51536. https://doi.org/10.1021/acsami.0c15508.
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