Enhancing the activity of oxygen-evolution and chlorine-evolution electrocatalysts by atomic layer deposition of TiO 2
Abstract
We report that TiO2 coatings formed via atomic layer deposition (ALD) may tune the activity of IrO2, RuO2, and FTO for the oxygen-evolution and chlorine-evolution reactions (OER and CER). Electrocatalysts exposed to ~3–30 ALD cycles of TiO2 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 TiO2 onto IrO2 yielded a 9-fold increase in the OER-specific activity in 1.0 M H2SO4 (0.1 to 0.9 mA cmECSA-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.
- Authors:
-
[1];
[5];
- The Linde Center for Global Environmental Science, Caltech, Pasadena, USA, The Resnick Sustainability Institute, Caltech, Pasadena
- Division of Engineering and Applied Science, Caltech, Pasadena, USA
- The Linde Center for Global Environmental Science, Caltech, Pasadena, USA
- The Resnick Sustainability Institute, Caltech, Pasadena, USA, Division of Chemistry and Chemical Engineering, Caltech, Pasadena
- Division of Chemistry and Chemical Engineering, Caltech, Pasadena, USA
- Publication Date:
- Research Org.:
- California Institute of Technology (CalTech), Pasadena, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); Bill and Melinda Gates Foundation
- OSTI Identifier:
- 1486898
- Alternate Identifier(s):
- OSTI ID: 1610783
- Grant/Contract Number:
- SC0004993; OPP1111246; OPP1149755
- Resource Type:
- Published Article
- Journal Name:
- Energy & Environmental Science
- Additional Journal Information:
- Journal Name: Energy & Environmental Science Journal Volume: 12 Journal Issue: 1; Journal ID: ISSN 1754-5692
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Chemistry; Energy & Fuels; Engineering; Environmental Sciences & Ecology
Citation Formats
Finke, Cody E., Omelchenko, Stefan T., Jasper, Justin T., Lichterman, Michael F., Read, Carlos G., Lewis, Nathan S., and Hoffmann, Michael R. Enhancing the activity of oxygen-evolution and chlorine-evolution electrocatalysts by atomic layer deposition of TiO 2. United Kingdom: N. p., 2019.
Web. doi:10.1039/C8EE02351D.
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. United Kingdom. https://doi.org/10.1039/C8EE02351D
Finke, Cody E., Omelchenko, Stefan T., Jasper, Justin T., Lichterman, Michael F., Read, Carlos G., Lewis, Nathan S., and Hoffmann, Michael R. Wed .
"Enhancing the activity of oxygen-evolution and chlorine-evolution electrocatalysts by atomic layer deposition of TiO 2". United Kingdom. https://doi.org/10.1039/C8EE02351D.
@article{osti_1486898,
title = {Enhancing the activity of oxygen-evolution and chlorine-evolution electrocatalysts by atomic layer deposition of TiO 2},
author = {Finke, Cody E. and Omelchenko, Stefan T. and Jasper, Justin T. and Lichterman, Michael F. and Read, Carlos G. and Lewis, Nathan S. and Hoffmann, Michael R.},
abstractNote = {We report that TiO2 coatings formed via atomic layer deposition (ALD) may tune the activity of IrO2, RuO2, and FTO for the oxygen-evolution and chlorine-evolution reactions (OER and CER). Electrocatalysts exposed to ~3–30 ALD cycles of TiO2 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 TiO2 onto IrO2 yielded a 9-fold increase in the OER-specific activity in 1.0 M H2SO4 (0.1 to 0.9 mA cmECSA-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.},
doi = {10.1039/C8EE02351D},
journal = {Energy & Environmental Science},
number = 1,
volume = 12,
place = {United Kingdom},
year = {2019},
month = {1}
}
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https://doi.org/10.1039/C8EE02351D
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