State Key Laboratory of Electroanalytical Chemistry, Jilin Province Key Laboratory of Low Carbon Chemical Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, China.
University of Chinese Academy of Sciences, Beijing 100049, China.
Nat Commun. 2017 Jul 24;8:15938. doi: 10.1038/ncomms15938.
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 at 80 °C with a low platinum loading of 0.09 mg cm, corresponding to a platinum utilization of 0.13 g kW 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.
为了在车辆中大规模、可持续地应用聚合物电解质膜燃料电池，在燃料电池的阴极氧还原反应中，作为阴极材料，需要使用具有低铂耗量的高性能电催化剂。在此，我们报道了一种基于碳黑的、具有成本效益的、高效且耐用的铂单原子电催化剂，该催化剂对一氧化碳/甲醇具有耐受性，可用于阴极氧还原反应。在酸性单电池中，以这种催化剂作为阴极，可实现高性能，在 80°C 时，功率密度高达 680 mW cm，铂载量低至 0.09 mg cm，在燃料电池中，铂的利用率为 0.13 g kW。还观察到良好的燃料电池耐久性。理论计算表明，在这种铂单原子电催化剂上的主要有效位点是单吡啶氮原子锚定的单铂原子中心，它对一氧化碳/甲醇具有耐受性，但对氧还原反应具有很高的活性。
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