Journal
SMALL METHODS
Volume 6, Issue 7, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smtd.202200377
Keywords
electrocatalysis; heterostructures; nanotubes; oxygen evolution reaction; Prussian blue
Funding
- National Natural Science Foundation of China [21902144, 11904317]
- Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang [2020R01002]
- Natural Science Foundation of Zhejiang Province [LD18E020003]
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This study reports the synthesis of NiSe2/Fe3O4 nanotubes with unique structure, which exhibit excellent electrocatalytic performance for oxygen evolution reactions. These nanotubes demonstrate good stability as well.
The rational design of high-efficient non-noble metal electrocatalysts for oxygen evolution reactions (OER) is of significance in electrochemical energy conversion. However, such low-cost but highly active electrocatalysts remain poorly developed because of the daunting synthetic challenge. Here, the synthesis of NiSe2/Fe3O4 nanotubes via a facile self-templating strategy, which manifests unique tetragonal morphology, asymmetric hollow interior, and unusual but adaptable heteroepitaxy structure, is reported. Benefiting from sufficient active sites and their improved activity around the heterointerface, accompanied by the good conductivity, the NiSe2/Fe3O4 nanotubes exhibit as a superior OER electrocatalyst, which affords the current density of 10 mA cm(-2) at a very small overpotential of 199 mV, high attainable current density beyond 200 mA cm(-2), and mass activity of 984.5 A g(-1), as well as excellent stability for 100 h in the alkaline media. This work provides a unique synthetic pathway to fabricate superior OER electrocatalysts by optimizing their composition and architecture.
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