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- Title
Fe-doped MnO<sub>2</sub>/NiCo<sub>2</sub>O<sub>4</sub> as Bifunctional Electrocatalyst for Oxygen Evolution Reaction and Oxygen Reduction Reaction in Alkaline Electrolyte.
- Authors
Wei, Chen-hui; Li, Chen-xin; Liu, Jin-liang; Huang, Hong-xia; Wu, Shi-long
- Abstract
The catalytic performance of spinel oxide NiCo2O4 for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) was investigated. It shows that NiCo2O4 synthesized via hydrothermal treatment at 90 ℃ followed by calcination at 350 ℃ exhibits excellent catalytic activity. Furthermore, Fe-doped MnO2 (marked as Fe-M) was introduced as a modifier to further improve the performance of NiCo2O4. As expected, the 20% Fe-M hybrid catalyst (NiCo2O4 modified with 20 wt% Fe-M) displays the best ORR and OER catalytic activity. This is evidenced by its high OER current density of 265 mA cm−2, high ORR current density of 220 mA cm−2, low OER Tafel slope of 119 mV dec−1, low ORR Tafel slope of 167 mV dec−1. These exceptional results can be attributed to the synergistic effect between NiCo2O4 and Fe-M. Based on synergistic effect, the 20% Fe-M hybrid catalyst exhibits the best catalytic activity for oxygen evolution reaction and oxygen reduction reaction.
- Subjects
OXYGEN evolution reactions; OXYGEN reduction; DOPING agents (Chemistry); CATALYTIC activity; ELECTROLYTES; COBALT phosphide; SPINEL group
- Publication
Catalysis Letters, 2024, Vol 154, Issue 7, p3541
- ISSN
1011-372X
- Publication type
Article
- DOI
10.1007/s10562-023-04573-y