Stability limits of tin-based electrocatalyst supports

Abstract Tin-based oxides are attractive catalyst support materials considered for application in fuel cells and electrolysers. If properly doped, these oxides are relatively good conductors, assuring that ohmic drop in real applications is minimal. Corrosion of dopants, however, will lead to severe...

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Autores principales:	Simon Geiger, Olga Kasian, Andrea M. Mingers, Karl J. J. Mayrhofer, Serhiy Cherevko
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/355139f8432744e7ba13638fd37ff90f
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spelling	oai:doaj.org-article:355139f8432744e7ba13638fd37ff90f2021-12-02T15:05:54ZStability limits of tin-based electrocatalyst supports10.1038/s41598-017-04079-92045-2322https://doaj.org/article/355139f8432744e7ba13638fd37ff90f2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04079-9https://doaj.org/toc/2045-2322Abstract Tin-based oxides are attractive catalyst support materials considered for application in fuel cells and electrolysers. If properly doped, these oxides are relatively good conductors, assuring that ohmic drop in real applications is minimal. Corrosion of dopants, however, will lead to severe performance deterioration. The present work aims to investigate the potential dependent dissolution rates of indium tin oxide (ITO), fluorine doped tin oxide (FTO) and antimony doped tin oxide (ATO) in the broad potential window ranging from −0.6 to 3.2 VRHE in 0.1 M H2SO4 electrolyte. It is shown that in the cathodic part of the studied potential window all oxides dissolve during the electrochemical reduction of the oxide – cathodic dissolution. In case an oxidation potential is applied to the reduced electrode, metal oxidation is accompanied with additional dissolution – anodic dissolution. Additional dissolution is observed during the oxygen evolution reaction. FTO withstands anodic conditions best, while little and strong dissolution is observed for ATO and ITO, respectively. In discussion of possible corrosion mechanisms, obtained dissolution onset potentials are correlated with existing thermodynamic data.Simon GeigerOlga KasianAndrea M. MingersKarl J. J. MayrhoferSerhiy CherevkoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Simon Geiger Olga Kasian Andrea M. Mingers Karl J. J. Mayrhofer Serhiy Cherevko Stability limits of tin-based electrocatalyst supports
description	Abstract Tin-based oxides are attractive catalyst support materials considered for application in fuel cells and electrolysers. If properly doped, these oxides are relatively good conductors, assuring that ohmic drop in real applications is minimal. Corrosion of dopants, however, will lead to severe performance deterioration. The present work aims to investigate the potential dependent dissolution rates of indium tin oxide (ITO), fluorine doped tin oxide (FTO) and antimony doped tin oxide (ATO) in the broad potential window ranging from −0.6 to 3.2 VRHE in 0.1 M H2SO4 electrolyte. It is shown that in the cathodic part of the studied potential window all oxides dissolve during the electrochemical reduction of the oxide – cathodic dissolution. In case an oxidation potential is applied to the reduced electrode, metal oxidation is accompanied with additional dissolution – anodic dissolution. Additional dissolution is observed during the oxygen evolution reaction. FTO withstands anodic conditions best, while little and strong dissolution is observed for ATO and ITO, respectively. In discussion of possible corrosion mechanisms, obtained dissolution onset potentials are correlated with existing thermodynamic data.
format	article
author	Simon Geiger Olga Kasian Andrea M. Mingers Karl J. J. Mayrhofer Serhiy Cherevko
author_facet	Simon Geiger Olga Kasian Andrea M. Mingers Karl J. J. Mayrhofer Serhiy Cherevko
author_sort	Simon Geiger
title	Stability limits of tin-based electrocatalyst supports
title_short	Stability limits of tin-based electrocatalyst supports
title_full	Stability limits of tin-based electrocatalyst supports
title_fullStr	Stability limits of tin-based electrocatalyst supports
title_full_unstemmed	Stability limits of tin-based electrocatalyst supports
title_sort	stability limits of tin-based electrocatalyst supports
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/355139f8432744e7ba13638fd37ff90f
work_keys_str_mv	AT simongeiger stabilitylimitsoftinbasedelectrocatalystsupports AT olgakasian stabilitylimitsoftinbasedelectrocatalystsupports AT andreammingers stabilitylimitsoftinbasedelectrocatalystsupports AT karljjmayrhofer stabilitylimitsoftinbasedelectrocatalystsupports AT serhiycherevko stabilitylimitsoftinbasedelectrocatalystsupports
_version_	1718388635974238208

Stability limits of tin-based electrocatalyst supports

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