English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

The Electronic Structure of Iridium Oxide Electrodes Active in Water Splitting

MPS-Authors
/persons/resource/persons104550

Pfeifer,  Verena
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;
Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Elektronenspeicherring BESSY II;

/persons/resource/persons135780

Jones,  Travis
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons104341

Velasco Vélez,  Juan
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;
Max-Planck-Institut für Chemische Energiekonversion;

/persons/resource/persons85190

Massué,  Cyriac
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;
Max-Planck-Institut für Chemische Energiekonversion;

/persons/resource/persons54379

Greiner,  Mark
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons22163

Teschner,  Detre
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons21557

Girgsdies,  Frank
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons80761

Scherzer,  Michael
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;
Max-Planck-Institut für Chemische Energiekonversion;

/persons/resource/persons54385

Allan,  Jasmin
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons99001

Hashagen,  Maike
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons22227

Weinberg,  Gisela
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons21590

Hävecker,  Michael
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;
Max-Planck-Institut für Chemische Energiekonversion;

/persons/resource/persons21743

Knop-Gericke,  Axel
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons22071

Schlögl,  Robert
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;
Max-Planck-Institut für Chemische Energiekonversion;

External Resource
No external resources are shared
Fulltext (public)

c5cp06997a.pdf
(Publisher version), 3MB

Supplementary Material (public)
There is no public supplementary material available
Citation

Pfeifer, V., Jones, T., Velasco Vélez, J., Massué, C., Greiner, M., Arrigo, R., et al. (2016). The Electronic Structure of Iridium Oxide Electrodes Active in Water Splitting. Physical Chemistry Chemical Physics, 18(4), 2292-2296. doi:10.1039/C5CP06997A.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0029-3A0E-E
Abstract
Iridium oxide based electrodes are among the most promising candidates for electrocatalyzing the oxygen evolution reaction, making it imperative to understand their chemical/electronic structure. However, the complexity of iridium oxide’s electronic structure makes it particularly difficult to experimentally determine the chemical state of the active surface species. To achieve an accurate understanding of the electronic structure of iridium oxide surfaces, we have combined synchrotron-based X-ray photoemission and absorption spectroscopies with ab-initio calculations. Our investigation reveals a pre-edge feature in the O K-edge of highly catalytically active X-ray amorphous iridium oxides that we have identified as O 2p hole states forming in conjunction with IrIII. These electronic defects in the near-surface region of the anionic and cationic framework are likely critical for the enhanced activity of amorphous iridium oxides relative to their crystalline counterparts.