The electrocatalytic oxygen reduction reaction (ORR) is of fundamental importance for sustainable energy conversion. Model studies are essential to elucidate the design principles as well as the structure-activity-stability relations. Knowledge from extended surfaces combined with fine control of the nanoscale structure has enabled the development of highly efficient nanoparticulate catalysts.
This review discusses recent advances in bimetallic electrocatalysts for enhanced ORR, from model surfaces to nanoparticles. A special focus has been placed on novel strategies involving morphology-controlled Pt-based nanomaterials with enhanced mass activity and high electrochemically active surface area. We conclude by highlighting the importance of in situ characterisation methods in order to both elucidate the active phase and understand the catalyst degradation mechanisms.
María Escudero-Escribano, Kim D. Jensen, Anders W. Jensen
Current Opinion in Electrochemistry
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