Structural evolution of Pt-based oxygen reduction reaction electrocatalysts

The commercialization of proton exchange membrane fuel cells (PEMFCs) could provide a cleaner energy society in the near future. However, sluggish reaction kinetics and harsh conditions oxygen reduction affect durability cost PEMFCs. Most previous reports on Pt-based electrocatalyst designs have focused more improving their activity; however, with PEMFCs, has received increasing attention. In-depth insight into structural evolution electrocatalysts throughout lifecycle can contribute to further optimization activity durability. development situ electron microscopy other techniques promoted elucidation mechanism. This mini review highlights recent advances electrocatalysts. mechanisms are adequately discussed, some methods inhibit or exploit catalysts also briefly reviewed.