Coexisting Single‐Atomic Fe and Ni Sites on Hierarchically Ordered Porous Carbon as a Highly Efficient ORR Electrocatalyst

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  • Zhengju Zhu
    Centre for Clean Environment and Energy Griffith University Gold Coast Queensland 4222 Australia
  • Huajie Yin
    Centre for Clean Environment and Energy Griffith University Gold Coast Queensland 4222 Australia
  • Yun Wang
    Centre for Clean Environment and Energy Griffith University Gold Coast Queensland 4222 Australia
  • Cheng‐Hao Chuang
    Department of Physics Tamkang University Tamsui 251 New Taipei City 251301 Taiwan
  • Lei Xing
    Department of Engineering Science University of Oxford Oxford OX1 3PJ UK
  • Mengyang Dong
    Centre for Clean Environment and Energy Griffith University Gold Coast Queensland 4222 Australia
  • Ying‐Rui Lu
    National Synchrotron Radiation Research Center Hsinchu 300 Taiwan
  • Gilberto Casillas‐Garcia
    Electron Microscopy Center University of Wollongong Wollongong NSW 2500 Australia
  • Yonglong Zheng
    Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Jiangsu National Synergetic Innovation Center for Advanced Materials Nanjing Tech University 30 Puzhu South Road Nanjing 211816 China
  • Shan Chen
    Centre for Clean Environment and Energy Griffith University Gold Coast Queensland 4222 Australia
  • Yuhai Dou
    Centre for Clean Environment and Energy Griffith University Gold Coast Queensland 4222 Australia
  • Porun Liu
    Centre for Clean Environment and Energy Griffith University Gold Coast Queensland 4222 Australia
  • Qilin Cheng
    Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science & Technology Shanghai 200237 China
  • Huijun Zhao
    Centre for Clean Environment and Energy Griffith University Gold Coast Queensland 4222 Australia

書誌事項

公開日
2020-09-16
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#am
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1002/adma.202004670
公開者
Wiley

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説明

<jats:title>Abstract</jats:title><jats:p>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N<jats:sub>4</jats:sub> and NiN<jats:sub>4</jats:sub> 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N<jats:sub>4</jats:sub> and NiN<jats:sub>4</jats:sub> sites, and the superior mass‐transfer capability promoted by the trimodal‐porous‐structured carbon support.</jats:p>

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