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Enhancing the activity of oxygen-evolution and chlorine-evolution electrocatalysts by atomic layer deposition of TiO(2)†

We report that TiO(2) coatings formed via atomic layer deposition (ALD) may tune the activity of IrO(2), RuO(2), and FTO for the oxygen-evolution and chlorine-evolution reactions (OER and CER). Electrocatalysts exposed to ~3–30 ALD cycles of TiO(2) exhibited overpotentials at 10 mA cm(–2) of geometr...

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Autores principales: Finke, Cody E., Omelchenko, Stefan T., Jasper, Justin T., Lichterman, Michael F., Read, Carlos G., Lewis, Nathan S., Hoffmann, Michael R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Royal Society of Chemistry 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7680952/
https://www.ncbi.nlm.nih.gov/pubmed/33312227
http://dx.doi.org/10.1039/c8ee02351d
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author Finke, Cody E.
Omelchenko, Stefan T.
Jasper, Justin T.
Lichterman, Michael F.
Read, Carlos G.
Lewis, Nathan S.
Hoffmann, Michael R.
author_facet Finke, Cody E.
Omelchenko, Stefan T.
Jasper, Justin T.
Lichterman, Michael F.
Read, Carlos G.
Lewis, Nathan S.
Hoffmann, Michael R.
author_sort Finke, Cody E.
collection PubMed
description We report that TiO(2) coatings formed via atomic layer deposition (ALD) may tune the activity of IrO(2), RuO(2), and FTO for the oxygen-evolution and chlorine-evolution reactions (OER and CER). Electrocatalysts exposed to ~3–30 ALD cycles of TiO(2) exhibited overpotentials at 10 mA cm(–2) of geometric current density that were several hundred millivolts lower than uncoated catalysts, with correspondingly higher specific activities. For example, the deposition of TiO(2) onto IrO(2) yielded a 9-fold increase in the OER-specific activity in 1.0 M H(2)SO(4) (0.1 to 0.9 mA cm(ECSA)(–2) at 350 mV overpotential). The oxidation state of titanium and the potential of zero charge were also a function of the number of ALD cycles, indicating a correlation between oxidation state, potential of zero charge, and activity of the tuned electrocatalysts.
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spelling pubmed-76809522020-12-10 Enhancing the activity of oxygen-evolution and chlorine-evolution electrocatalysts by atomic layer deposition of TiO(2)† Finke, Cody E. Omelchenko, Stefan T. Jasper, Justin T. Lichterman, Michael F. Read, Carlos G. Lewis, Nathan S. Hoffmann, Michael R. Energy Environ Sci Paper We report that TiO(2) coatings formed via atomic layer deposition (ALD) may tune the activity of IrO(2), RuO(2), and FTO for the oxygen-evolution and chlorine-evolution reactions (OER and CER). Electrocatalysts exposed to ~3–30 ALD cycles of TiO(2) exhibited overpotentials at 10 mA cm(–2) of geometric current density that were several hundred millivolts lower than uncoated catalysts, with correspondingly higher specific activities. For example, the deposition of TiO(2) onto IrO(2) yielded a 9-fold increase in the OER-specific activity in 1.0 M H(2)SO(4) (0.1 to 0.9 mA cm(ECSA)(–2) at 350 mV overpotential). The oxidation state of titanium and the potential of zero charge were also a function of the number of ALD cycles, indicating a correlation between oxidation state, potential of zero charge, and activity of the tuned electrocatalysts. Royal Society of Chemistry 2018-12-14 2019 /pmc/articles/PMC7680952/ /pubmed/33312227 http://dx.doi.org/10.1039/c8ee02351d Text en © 2019 The Royal Society of Chemistry 2019 http://creativecommons.org/licenses/by/3.0/ This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
spellingShingle Paper
Finke, Cody E.
Omelchenko, Stefan T.
Jasper, Justin T.
Lichterman, Michael F.
Read, Carlos G.
Lewis, Nathan S.
Hoffmann, Michael R.
Enhancing the activity of oxygen-evolution and chlorine-evolution electrocatalysts by atomic layer deposition of TiO(2)†
title Enhancing the activity of oxygen-evolution and chlorine-evolution electrocatalysts by atomic layer deposition of TiO(2)†
title_full Enhancing the activity of oxygen-evolution and chlorine-evolution electrocatalysts by atomic layer deposition of TiO(2)†
title_fullStr Enhancing the activity of oxygen-evolution and chlorine-evolution electrocatalysts by atomic layer deposition of TiO(2)†
title_full_unstemmed Enhancing the activity of oxygen-evolution and chlorine-evolution electrocatalysts by atomic layer deposition of TiO(2)†
title_short Enhancing the activity of oxygen-evolution and chlorine-evolution electrocatalysts by atomic layer deposition of TiO(2)†
title_sort enhancing the activity of oxygen-evolution and chlorine-evolution electrocatalysts by atomic layer deposition of tio(2)†
topic Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7680952/
https://www.ncbi.nlm.nih.gov/pubmed/33312227
http://dx.doi.org/10.1039/c8ee02351d
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