Journal
CHEMISTRY-AN ASIAN JOURNAL
Volume 15, Issue 9, Pages 1484-1492Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.202000213
Keywords
Hydrogen energy; electro water oxidation; translation metal electrocatalyst; high wettability; large current densities
Categories
Funding
- YNational Natural Science Foundation of China [21878204] Funding Source: Medline
- Shanxi Province [201903D421073] Funding Source: Medline
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Electrochemical water splitting is an ideal pollution-free path to generate hydrogen at large scale, however, the development of highly catalytic electrocatalysts for the water oxidation reaction at large current densities is still a fundamental challenge. Herein, we report a novel, high-wettability water-oxidation electrocatalyst composed of an amorphous NiFe layer and CoS film on commercial nickel foam via a two-step electrodeposition synthetic path. Benefiting from the strong interactions between the NiFe layer and CoS film, enlarged surface active sites and enhanced wettability, the CoS@NiFe/NF electrode exhibited an outstanding water oxidation performance at 10 mA/cm(2) with an overpotential of 175 mV in 1 M KOH solution and steadily delivered a current density of 1 A/cm(2) at merely 330 mV in 30 wt% KOH solution. Even at large densities, the CoS@NiFe/NF hybrids also showed excellent water oxidation stability and corrosion resistance for at least 24 h. Such a synergistic assembling approach to fabricate a CoS@NiFe/NF heterostructure together with excellent OER performance may be a promising strategy for rationally building and designing heterostructural electrocatalysts towards highly efficient water oxidation reaction.
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