Electronic Conductivity of Films of Electroflocculated 2 nm Iridium Oxide Nanoparticles

The electronic conductivity of films of iridium oxide (IrO x ) composed of ca. 2 nm nanoparticles (NPs) is strongly dependent on the film oxidation state. The IrIVO x NPs can be electrochemically converted to several oxidation states, ranging from IrIII to IrV oxides. The NP films exhibit a very hig...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2014-03, Vol.136 (9), p.3385-3387
Main Authors: Chow, Kwok-Fan, Carducci, Tessa M, Murray, Royce W
Format: Article
Language:English
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Summary:The electronic conductivity of films of iridium oxide (IrO x ) composed of ca. 2 nm nanoparticles (NPs) is strongly dependent on the film oxidation state. The IrIVO x NPs can be electrochemically converted to several oxidation states, ranging from IrIII to IrV oxides. The NP films exhibit a very high apparent conductivity, e.g., 10–2 S cm–1, when the NPs are in the oxidized +4/+5 state. When the film is fully reduced to its IrIII state, the apparent conductivity falls to 10–6 S cm–1.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja413226j