CoFeNi based trifunctional electrocatalysts featuring in-situ formed heterostructure
- Publisher:
- Elsevier
- Publication Type:
- Journal Article
- Citation:
- Inorganic Chemistry Communications, 2023, 149, pp. 110402
- Issue Date:
- 2023-03-01
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2-s2.0-85146182962 AM.pdf | Submitted version | 1.41 MB |
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All-in-one transition metal-based electrocatalysts with high activities towards different reactions in aqueous electrolytes are of critical importance as they can dramatically bring down the cost of relevant energy devices. Herein a facile and low-cost synthesis of CoFeNi nanoparticles encapsulated by an N-doped carbon layer has been developed by pyrolyzing Prussian blue (PB) precursors. The obtained catalyst features tri-catalytic activity towards OER, ORR, and HER reactions in alkaline and acidic condition, and show great potential as a catalyst for water splitting and anode material for Zinc-Air batteries. Moreover, compared with the single phase, the sample with the heterostructure composed of both fcc and bcc phases exhibited dramatic enhancement in multi-catalytic activity. The heterostructure originates from an in-situ phase separation induced by composition variation. This demonstrates the effectiveness of heterostructure engineering introduced by in-situ phase separation in boosting the multi-catalytic activity.
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