铂金
碳纤维
催化作用
密度泛函理论
氧还原反应
化学
材料科学
电化学
无机化学
物理化学
计算化学
电极
有机化学
复合数
复合材料
作者
Jing Liu,Menggai Jiao,Bingbao Mei,Yuxin Tong,Yuping Li,Mingbo Ruan,Ping Song,Gongquan Sun,Luhua Jiang,Ying Wang,Zheng Jiang,Lin Gu,Zhen Zhou,Weilin Xu
标识
DOI:10.1002/ange.201812423
摘要
Abstract Maximizing the platinum utilization in electrocatalysts toward oxygen reduction reaction (ORR) is very desirable for large‐scale sustainable application of Pt in energy systems. A cost‐effective carbon‐supported carbon‐defect‐anchored platinum single‐atom electrocatalysts (Pt 1 /C) with remarkable ORR performance is reported. An acidic H 2 /O 2 single cell with Pt 1 /C as cathode delivers a maximum power density of 520 mW cm −2 at 80 °C, corresponding to a superhigh platinum utilization of 0.09 g Pt kW −1 . Further physical characterization and density functional theory computations reveal that single Pt atoms anchored stably by four carbon atoms in carbon divacancies (Pt‐C 4 ) are the main active centers for the observed high ORR performance.
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