Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 265, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2019.118569
Keywords
Rechargeable zinc-O-2 batteries; Oxygen reduction reactions; Oxygen evolution reactions; Fe2NiSe4-nanocubes; Se-GNG bridging-bond
Funding
- National Key Research and Development Program of China [2018YFB1502700]
- National Natural Science Foundation of China [91834301, 91534205, 21436003, 21576031, 21776023, 21988028]
- Fundamental Research Funds for the Central Universities [2018CDXYHG0028]
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Hybrid of transition-nitrogen-doped carbon (M-NC) and transition metal nanomaterials into one single catalyst has been considered as the most promising strategy for constructing bifunctional oxygen reduction and evolution reaction (ORR/OER) catalysts. However, the direct evidence of bridged-bond between ORR and OER catalyst which is crucial for enhancing the electrocatalytic performance, has never been confirmed in the literature. In this manuscript, we exploited a new class of strongly coupled Fe2NiSe4@Fe-NC hybrid material, in which the Fe2NiSe4 nanocubes strongly coupled to the Fe-NC through the selenium-graphitic-nitrogen bond (Se-GNG). Additional characterizations and DET calculations have confirmed that the Se-GNG bond can act as a bridge to deliver the electrons from Fe and Ni to the graphitic-N (Quaternary-N), which is beneficial to enhance both the ORR/OER activity and durability. Due to this strong electronic interaction, this novel hybrid Fe2NiSe4@Fe-NC electrocatalyst reveals superior performance and durable operation without chemical instability towards both ORR/OER.
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