The
development of a high current density with high energy conversion
efficiency electrocatalyst is vital for large-scale industrial application
of alkaline water splitting, particularly seawater splitting. Herein,
we design a self-supporting Co3(PO4)2-MoO3–x
/CoMoO4/NF superaerophobic
electrode with a three-dimensional structure for high-performance
hydrogen evolution reaction (HER) by a reasonable devise of possible
“Co-O-Mo hybridization” on the interface. The “Co-O-Mo
hybridization” interfaces induce charge transfer and generation
of fresh oxygen vacancy active sites. Consequently, the unique heterostructures
greatly facilitate the dissociation process of H2O molecules
and enable efficient hydrogen spillover, leading to excellent HER
performance with ultralow overpotentials (76 and 130 mV at 100 and
500 mA cm–2) and long-term durability of 100 h in
an alkaline electrolyte. Theoretical calculations reveal that the
Co3(PO4)2-MoO3–x
/CoMoO4/NF promotes the adsorption/dissociation
process of H2O molecules to play a crucial role in improving
the stability and activity of HER. Our results exhibit that the HER
activity of non-noble metal electrocatalysts can be greatly enhanced
by rational interfacial chemical bonding to modulate the heterostructures.
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