Oxygen-deficient annealing boosts performance of CoNiFe oxide electrocatalyst in oxygen evolution reaction

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F24%3A43930203" target="_blank" >RIV/60461373:22310/24:43930203 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0021951724003889" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0021951724003889</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jcat.2024.115675" target="_blank" >10.1016/j.jcat.2024.115675</a>

Result language
angličtina
Original language name
Oxygen-deficient annealing boosts performance of CoNiFe oxide electrocatalyst in oxygen evolution reaction
Original language description
Mixed oxides of transition metals have emerged as promising catalysts for the oxygen evolution (OER) reaction in alkaline water electrolysis. Since OER is significantly slower than hydrogen evolution, developing stable and easily accessible materials that effectively promote OER is one of the keys to improving overall efficiency. In this context, we present a promising method for preparing Co-Ni-Fe oxides which is based on a straightforward sol-gel procedure. Key to success is a thermal treatment under oxygen-deficient atmosphere, which renders superior electrocatalytic properties compared to a treatment under reductive and aerobic conditions, respectively. Attractive performance characteristics are thereby obtained, e.g., a n10 value of 291 mV and a Tafel slope of 32 mV dec- 1. The impact of the annealing conditions on the material properties has been elaborated using cyclic voltammetry, impedance spectroscopy, and structural analyses. Stability and strong performance under practical conditions were confirmed in long-term studies using an AEM electrolyzer.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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