Effect of Adding CeO2to RuO2-IrO2Mixed Nanocatalysts: Activity towards the Oxygen Evolution Reaction and Stability in Acidic Media
| Autor: | Teko W. Napporn, K. Boniface Kokoh, Thomas Audichon, Cláudia Morais, Clément Comminges, Sophie Morisset |
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| Přispěvatelé: | Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers-Institut de Chimie du CNRS (INC) |
| Rok vydání: | 2015 |
| Předmět: |
Inorganic chemistry
water splittin chemistry.chemical_element 02 engineering and technology 010402 general chemistry Electrocatalyst 7. Clean energy 01 natural sciences Catalysis trimetallic oxides Electrochemistry electrocatalysis Tafel equation Chemistry Oxygen evolution [CHIM.CATA]Chemical Sciences/Catalysis 021001 nanoscience & nanotechnology Nanomaterial-based catalyst 0104 chemical sciences Dielectric spectroscopy Cerium oxygen evolution reaction hydrogen Cyclic voltammetry 0210 nano-technology |
| Zdroj: | ChemElectroChem ChemElectroChem, Weinheim : Wiley-VCH, 2015, 2 (8 ), pp.1128-1137. ⟨10.1002/celc.201500072⟩ |
| ISSN: | 2196-0216 |
| DOI: | 10.1002/celc.201500072 |
| Popis: | International audience; Trimetallic Ru-, Ir-, and Ce-oxide materials were synthesized by using a hydrolysis method in ethanol medium and characterized to obtain information on their crystallographic structure, morphology, and chemical composition. Voltammetric measurements allowed us to evaluate the properties of these catalysts through the determination of their capacitance, active site number, and accessibility. The effect of cerium on the oxygen evolution reaction (OER) was also evaluated electrochemically and the catalytic layer stability was measured by using a repetitive cyclic voltammetry procedure. The catalysts stability in an acidic medium is not significantly affected by cerium addition. Moreover, the oxygen mobility in the ceria crystallographic structure may contribute to an enhanced electrocatalytic activity per active site. Tafel slope values were determined from electrochemical impedance spectroscopy fitting parameters and indicate the same OER rate-determining step for mono-, bi-, and trimetallic catalysts. |
| Databáze: | OpenAIRE |
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