Tuning Defects in Ni‐Doped Maghemite for Enhanced Solar Driven Oxygen Evolution: Insights From <i>Operando</i> X‐Ray Spectroscopies
(111) films with different Ni concentrations. We present a comprehensive study that sheds light on the structural reconfigurations induced by tuning the Ni concentration and the resulting effects on the OER onset and photoconversion efficiency in alkaline media. Samples' electronic reconfiguration under operando conditions and the role of Ni dopant on the catalytic mechanism are studied with X-ray Absorption Spectroscopy. Light-driven surface chemistry modifications during OER are probed with a novel X-ray fluorescence pump-and-probe approach: Fixed energy X-ray absorption PhotoVoltammetry.
Authors
- Francesco Paparoni (ORCID: https://orcid.org/0000-0002-8210-7586)
- H. Magnan (ORCID: https://orcid.org/0000-0002-2239-5408)
- Emiliano Fonda
- Javad Rezvani
- Antoine Barbier
- Andrea Zitolo
- AndreaDi Cicco
Institutions
- Università di Camerino (IT)
- Centre National de la Recherche Scientifique (FR)
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR)
- Synchrotron soleil (FR)
- Service de Physique de l'État Condensé (FR)
- CEA Paris-Saclay (FR)
Publication Details
- Journal
- Advanced Science
- Published
- 2026-03-31
- DOI
- https://doi.org/10.1002/advs.202524386
- Primary Topic
- Iron oxide chemistry and applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Agence Nationale de la Recherche