Nanostructured Carbon-Based Electrocatalysts for Oxygen Reduction Reaction: Enhancing Catalytic Activity and Identifying Active Sites

Abstract

The development of highly active, durable, and low-cost oxygen reduction reaction (ORR) catalysts is central to making polymer electrolyte fuel cells (PEFCs) commercially viable. In this regard, noble metal-free, nanostructured carbon-based electrocatalysts for the ORR have been of tremendous interests. Yet, the ORR activity of carbon-based catalysts is still lagged behind the Pt-based catalysts. Furthermore, the understanding of critical factors governing the ORR activity of carbon-based catalysts and the identification of their active sites are still not well understood. In this talk, we present the design strategies toward high-performing ORR catalysts based on mesoporous carbons and carbon nanotubes. In addition, our recent efforts for understanding the active sites in the nanocarbon-based ORR catalysts will be also presented.