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 language | English |
|---|---|
| Pages (from-to) | 1869-1877 |
| Number of pages | 9 |
| Journal | Nano Research |
| Volume | 16 |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 2023 |
| Externally published | Yes |
Keywords
- manganese (Mn)-iron (Fe) binuclear sites
- oxygen reduction reaction
- spin state
- synergistic effect
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