OERKOP aims to understand and describe the mechanisms underlying the OER for co-catalyst modified hematite photoanodes, by using a correlative operando characterization approach at the nanoscale. OERKOP proposes a comparative study between two archetypal materials used as photoanodes: α-Fe2O3 and BiVO4, both catalytically activated by oxyhydroxide catalysts (M-OOH, with M = Fe, Ni, Co, Cu, Zn). Surface kinetics and time stability during the oxidation will be systematically evaluated. We intend combining multi-scale and multi-selective techniques - scanning transmission X-ray microscopy (STXM) and scanning transmission electron microscopy (STEM). Both techniques will employ a common sample environment in a dedicated photoelectrochemical cell. Complementary DFT calculations will allow dissecting complex effects and determining the reaction priorities of different photocatalytic sites.
CONSORTIUM:
SPEC
CEA, CNRS
Univ. Paris-Saclay
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Synchrotron SOLEIL
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IPCMS
Univ. de Strasbourg
CNRS
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Dana STANESCU (LNO)
Yannick DAPPE (GMT)
Cindy ROUNTREE (SPHYNX)
Frederic MERLET (LNO)
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Stefan STANESCU (HERMES)
Jean-Baptiste BOY (HERMES)
Karine CHAOUCHI (Laboratoire de chimie)
Stephanie BLANCHANDIN (Laboratoire de chimie)
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POSITIONS:
Interns:
PhD 1: starting October 2023
SL-DRF-23-0751
PhD 2: starting October 2024
Préliminary works and results:
Results dissemination during OERKOP:
Oral and poster presentations Scientific preprints and peer-review articles Internship reports and PhD thesisMEETINGS:
1) Kick-off meeting
Date: 20th of April @SPEC
Agenda....
• Institut Rayonnement Matière de Saclay • UMR 3680 - Service de Physique de l'Etat Condensé (SPEC)
• Laboratoire Nano-Magnétisme et Oxydes (LNO)
• Aqueous chemical growth of nanostructured oxide films • Banc de mesure de la photo-électrolyse de l’eau / spectroscopie d’impédance