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    題名: Coexisting Single-Atomic Fe and Ni Sites on Hierarchically Ordered Porous Carbon as a Highly Efficient ORR Electrocatalyst
    作者: Zhu, Zhengju;Huajie Yin, Yun Wang;Chuang, Cheng-Hao;Xing, Lei;Dong, Mengyang;Lu, Ying-Rui;Gilberto, Casillas-Garcia;Zheng, Yonglong;Chen, Shan;Dou, Yuhai;Liu, Porun;Cheng, Qilin;Zhao, Huijun
    日期: 2020-09-16
    上傳時間: 2021-05-05 12:12:01 (UTC+8)
    摘要: The development of oxygen reduction reaction (ORR) electrocatalysts based on earth‐abundant nonprecious materials is critically important for sustainable large‐scale applications of fuel cells and metal–air batteries. Herein, a hetero‐single‐atom (h‐SA) ORR electrocatalyst is presented, which has atomically dispersed Fe and Ni coanchored to a microsized nitrogen‐doped graphitic carbon support with unique trimodal‐porous structure configured by highly ordered macropores interconnected through mesopores. Extended X‐ray absorption fine structure spectra confirm that Fe‐ and Ni‐SAs are affixed to the carbon support via FeN4 and NiN4 coordination bonds. The resultant Fe/Ni h‐SA electrocatalyst exhibits an outstanding ORR activity, outperforming SA electrocatalysts with only Fe‐ or Ni‐SAs, and the benchmark Pt/C. The obtained experimental results indicate that the achieved outstanding ORR performance results from the synergetic enhancement induced by the coexisting FeN4 and NiN4 sites, and the superior mass‐transfer capability promoted by the trimodal‐porous‐structured carbon support.
    關聯: Advanced Materials 32(42), 2004670
    DOI: 10.1002/adma.202004670
    顯示於類別:[電機工程學系暨研究所] 期刊論文

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