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

Cody E. Finke, Stefan T. Omelchenko, Justin T. Jasper, Michael F. Lichterman, Carlos G. Read, Nathan S Lewis, Michael R. Hoffmann

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)358-365
Number of pages8
JournalEnergy and Environmental Science
Volume12
Issue number1
DOIs
Publication statusPublished - Jan 1 2019

Fingerprint

Atomic layer deposition
Electrocatalysts
Chlorine
chlorine
Oxygen
oxygen
Oxidation
Titanium
oxidation
Current density
density current
titanium
coating
Coatings
Catalysts
catalyst
fold

ASJC Scopus subject areas

  • Environmental Chemistry
  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Pollution

Cite this

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.

In: Energy and Environmental Science, Vol. 12, No. 1, 01.01.2019, p. 358-365.

Research output: Contribution to journalArticle

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 In: Energy and Environmental Science. 2019 ; Vol. 12, No. 1. pp. 358-365.
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