Observing the oxidation state turnover in heterogeneous iridium-based water oxidation catalysts
By A. Minguzzi, Ottavio Lugaresi, Elisabetta Achilli, C. Locatelli, A. Vertova, P. Ghigna, S. Rondinini. 2014
161 citations recorded by the source corpus.
In this work the oxidation states assumed by Ir in oxide systems used as heterogeneous catalysts for water oxidation are determined by means of in situ X-ray Absorption Spectroscopy (XAS). Using a highly hydrated iridium oxide film allows the maximum number of Ir sites to be involved in the electrochemical processes occurring at the catalysts during water oxidation (oxygen evolution reaction, OER). X-ray Absorption Near Edge Structure (XANES) spectra clearly indicate the co-existence of Ir(III) and Ir(V) at the electrode potentials where OER occurs. This represents a fundamental step both in the understanding of the water oxidation mechanism catalysed by heterogeneous Ir oxide systems, and in the possible tailoring of electrocatalysts for OER.
Subfields: Electrochemistry, Materials Chemistry, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/18481e3cb44075778c250b70bbf102bd42943094
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Materials Chemistry
In Renewable Energy, Sustainability and the Environment
Citations in the corpus
- Activation of surface oxygen sites on an iridium-based model catalyst for the oxygen evolution reaction (2016, methodology): “27,37 We also demonstrate that drastic structural reorganization is experienced when triggering the reactivity of surface oxygen, with cationic migration occurring from the bulk to the surface.”