Electrocatalysts for the Oxygen Reduction Reaction From Platinum Alloys to Complex Solutions


Boosting reaction kinetics to improve storage and conversion of renewable energy: One of the most researched is the oxygen reduction reaction, which is the bottleneck for the development of fuel cell technology. In a new paper, CENIDE member Dr. Viktor Čolić discusses recent progress in research and existing challenges in the electrochemical evaluation of alloy materials – as catalysts for the reaction.

Of particular interest for discussion are complex alloy materials, that is, alloys with multiple principal constituents (MPCAs). They have emerged as a material that could potentially replace platinum and platinum-based materials – electrode materials that are very expensive and scarce, and therefore not widely applicable. Because this new type of material exhibits a wide variety of active sites, it may enable that the optimal binding site on the catalyst surface to be determined experimentally.

Čolić’s research group "Electrochemistry for Energy Conversion" at MPI CEC was jointly established with UDE in 2019 and the labs are located in the NanoEnergieTechnikZentrum (NETZ). The group primarily aims to use electrochemical methods in conjunction with surface science and other instrumental analytical techniques to investigate the relationships between surface and electrolyte properties and electrocatalytic activity. The focus is on reactions of interest for energy conversion, storage, and utilization.

Image: Challenges in the electrochemical evaluation of complex alloys.

Original publication:
Martínez-Hincapié, R.; Čolić, V. Electrocatalysts for the Oxygen Reduction Reaction: From Bimetallic Platinum Alloys to Complex Solid Solutions. ChemEngineering 2022, 6, 19. https://doi.org/10.3390/chemengineering6010019