dc.description.abstract |
Development of highly active and durable electrocatalysts for oxygen reduction reaction (ORR) is of pivotal importance for polymer electrolyte membrane fuel cells (PEMFCs). While carbon-supported nanostructured Pt-based catalysts have demonstrated high activity for the ORR, their durability and single-cell performance are yet to be improved. In this talk, we present self-supported, Pt-based intermetallic (Pt–M; M=Ni, Co, Fe, Cu) nanocatalysts, based on nanoporous and nanowire structures, as highly active and durable ORR catalysts. Nanostructured Pt–M intermetallic nanocatalysts showed enhanced ORR activity, compared to Pt black, Pt/C, and alloy Pt–M catalysts. Significantly, Pt–M intemetallic nanocatalysts exhibited ultrahigh durability, with no decay of activity even after 50,000 potential cycles, whereas Pt black and Pt/C undergo dramatic degradation. Some of Pt–M intermetallic nanocatalysts demonstrated PEMFC single cell performances with very high durability. |
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