High performance platinum single atom electrocatalyst for oxygen reduction reaction.

High performance platinum single atom electrocatalyst for oxygen reduction reaction.
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DOI:
10.1038/ncomms15938
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发表时间:
2017-07-24
影响因子:
16.6
通讯作者:
Sun G
Sun G
中科院分区:
综合性期刊1区
文献类型:
--
作者:
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

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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. High-performance electrocatalysts for the oxygen reduction reaction (ORR) typically use platinum (Pt), however its high cost is a hindrance to commercial scale up. Here, the authors report a cost-effective, efficient and durable Pt single-atom electrocatalyst for ORR with a Pt utilization of 0.13 gPt kW−1 in a fuel cell.
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