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Electrocatalytic materials incorporated into gas diffusion electrodes (GDEs) are of great importance for electrochemical energy conversion and storage in fuel cells, metal-air batteries and battery systems, electrolyzers and other industrial processes. For example, oxygen reduction reaction (ORR), oxygen evolution reaction (OER), hydrogen oxidation reaction (HOR) and hydrogen evolution reaction (HER), either for the demanding reaction with its complex mechanisms or for the facile reactions for the proper functioning of the performance/stability characteristics need active materials for electrocatalysis to take place. Furthermore, combination with supports for dispersion, promotion of high surface and porosity as well as conductivity together with the design aspects of the GDEs, especially for the low and medium-temperature fuel cells and other electrochemical applications can significantly enhance the outcome in the form of high current or power densities with lower overvoltages. The dependence on noble metal catalysts or their alloys, albeit in low loadings in many electrochemical systems, especially for application in fuel cells or electrolyzers has so far hampered commercialization due to their high costs, instability and accessibility globally. The research approach is mainly multifaceted, viz. preparation of highly functional materials from the transition d-metals with additives and/or promoters as heterogeneous catalysts, integration of the same in a robust electrode configuration and physicochemical characterization of the electrocatalytic materials using various analytical tools.
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HYDROGENno. 1 (2024): 70-101
FRONTIERS IN ENERGY RESEARCH (2021)
Inna L. Soroka, Jens Bjervås,Joakim Ceder, Gustaf Wallnerström, Mallory Connan,Nadezda V. Tarakina,Annika C. Maier,Yohannes Kiros
Jerry L. Solis, Robert Davila, Camilo Sandoval,Daniel Guzmán,Héctor Guzmán,Lucio Alejo,Yohannes Kiros
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