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  • Title: High performance platinum single atom electrocatalyst for oxygen reduction reaction.
    Author: Liu J, Jiao M, Lu L, Barkholtz HM, Li Y, Wang Y, Jiang L, Wu Z, Liu DJ, Zhuang L, Ma C, Zeng J, Zhang B, Su D, Song P, Xing W, Xu W, Wang Y, Jiang Z, Sun G.
    Journal: Nat Commun; 2017 Jul 24; 8():15938. PubMed ID: 28737170.
    Abstract:
    For the large-scale sustainable implementation of polymer electrolyte membrane fuel cells in vehicles, high-performance electrocatalysts with low platinum consumption are desirable for use as cathode material during the oxygen reduction reaction in fuel cells. Here we report a carbon black-supported cost-effective, efficient and durable platinum single-atom electrocatalyst with carbon monoxide/methanol tolerance for the cathodic oxygen reduction reaction. The acidic single-cell with such a catalyst as cathode delivers high performance, with power density up to 680 mW cm-2 at 80 °C with a low platinum loading of 0.09 mgPt cm-2, corresponding to a platinum utilization of 0.13 gPt kW-1 in the fuel cell. Good fuel cell durability is also observed. Theoretical calculations reveal that the main effective sites on such platinum single-atom electrocatalysts are single-pyridinic-nitrogen-atom-anchored single-platinum-atom centres, which are tolerant to carbon monoxide/methanol, but highly active for the oxygen reduction reaction.
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