Elucidating the effect of oxidation state and atomic structure of Mn-doped NiOOH water oxidation catalysts with operando XRD/PDF and XAS

Name: Elucidating the effect of oxidation state and atomic structure of Mn-doped NiOOH water oxidation catalysts with operando XRD/PDF and XAS
Creator: University of Bern, Department of Chemistry and Biochemistry, Freiestrasse 3, 3012 Berne, Switzerland; Aarhus University, Biological and Chemical Engineering, Aabogade 40, 8200, Aarhus, DK; University of Copenhagn, Department of Chemistry, Nanoscience Centre, 5 Universitetsparken, 2100 Copenhagen, Denmark
Published: 2028-01-01 00:00:00
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ESRF Portal2028-01-01 更新2026-04-23 收录

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https://doi.esrf.fr/10.15151/ESRF-ES-1990502530

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This proposal investigates the structure of Mn-doped Ni-layered double hydroxide (LDH) during the oxygen evolution reaction (OER) using simultaneous X-ray scattering and absorption spectroscopy. By varying manganese concentrations, the study aims to understand the catalyst's active structure under realistic electrolysis conditions. Operando X-ray diffraction and total scattering will determine how manganese affects the interlayer distance and structural changes within the catalyst layers. Simultaneous X-ray absorption spectroscopy will track the oxidation states of Mn and Ni. This research contributes to developing new OER catalysts, crucial for green hydrogen production, with Ni-based hydroxides. The study employs a newly developed operando gas diffusion electrode (GDE) cell for realistic electrolysis condition, which allows measuring combines XAS and XRD/PDF.

提供机构：

University of Bern, Department of Chemistry and Biochemistry, Freiestrasse 3, 3012 Berne, Switzerland; Aarhus University, Biological and Chemical Engineering, Aabogade 40, 8200, Aarhus, DK; University of Copenhagn, Department of Chemistry, Nanoscience Centre, 5 Universitetsparken, 2100 Copenhagen, Denmark

创建时间：

2028-01-01