Nitrogen-doped hollow carbon spheres with highly graphitized mesoporous shell: Role of Fe for oxygen evolution reaction

Min Young Song, Dae Soo Yang, Kiran Pal Singh, Jinliang Yuan, Jong Sung Yu

Research output: Contribution to journalArticlepeer-review

Abstract

There are many studies portraying iron (Fe) and nitrogen (N)-functionalzed carbon as an electrocatalyst along with possible elucidation of catalytically active sites. Despite continuous controversial debate on the active sites/species, the presence of N is believed to be undeniably needed for the efficient catalysis, whereas the necessity and role of Fe are still debated. To clearly understand the role of Fe in Fe and N-functionalized electrocatalyst, N-doped hollow mesoporous shell carbon (N-HMSC) is prepared as a uniform model electrocatalyst by a simple template nanocasting using Fe phthalocyanine (FePc) as a single precursor for carbon, N, and Fe. It is found that the presence of Fe in N-HMSC leads to the efficient graphitization of N-HMSC structure, which can be beneficial for electrocatalytic oxygen evolution reaction (OER). Interestingly, it is observed that Fe is a must for the preparation of high efficient catalyst, but may not be necessary for OER.

Original languageEnglish
Pages (from-to)202-208
Number of pages7
JournalApplied Catalysis B: Environmental
Volume191
DOIs
Publication statusPublished - 2016 Aug 15

Subject classification (UKÄ)

  • Materials Chemistry

Free keywords

  • Graphitized carbon
  • Hollow carbon
  • Iron
  • Nitrogen-doped
  • Oxygen evolution reaction

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