Modulating the electronic spin state by constructing dual-metal atomic pairs for activating the dynamic site of oxygen reduction reaction

  • Shenghua Ye
  • , Shuhua Xie
  • , Yaqi Lei
  • , Xiuyuan Yang
  • , Jing Hu
  • , Lirong Zheng
  • , Zhida Chen
  • , Yonghuan Fu
  • , Xiangzhong Ren
  • , Yongliang Li
  • , Xiaoping Ouyang
  • , Qianling Zhang
  • , Jianhong Liu
  • , Xueliang Sun

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

In this study, dual-metal atomic pairs of manganese (Mn)-iron (Fe) binuclear sites (BNSs) with two conjoint MnN4 and FeN4 moieties (MnFeN8) anchored onto a graphite-like structure (GLS) (Mn-Fe BNSs/GLS) were constructed. The binuclear MnFeN8 structure was verified experimentally and theoretically. Magnetic measurements and Gaussian calculations reveal that this unique Mn-Fe BNSs exhibit strong short-range electronic interaction between Mn and Fe sites, which decouples two paired d electrons in Fe sites, thereby transforming Fe sites from an intermediate to a high spin state. The optimal electronic configuration of Fe sites and their binuclear structure facilitate an oxygen reduction reaction (ORR) thermodynamically and dynamically, respectively, endowing Mn-Fe BNSs with improved ORR performance. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)1869-1877
Number of pages9
JournalNano Research
Volume16
Issue number2
DOIs
StatePublished - Feb 2023
Externally publishedYes

Keywords

  • manganese (Mn)-iron (Fe) binuclear sites
  • oxygen reduction reaction
  • spin state
  • synergistic effect

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