Ultrasmall
Cu/Ni-NiO
x
nanoparticles
(NPs) had been successfully prepared by attaching and growing Ni-NiO
x
NPs on the surface of Cu NPs and then uniformly
dispersed onto graphene (G) surface. High-angle annular dark-field–scanning
transmission electron microscopy (HAADF-STEM) characterization confirmed
that Ni-NiO
x
NPs were uniformly distributed
on the surface of Cu NPs. The catalytic methanolysis of ammonia borane
(AB) proved that Cu/Ni-NiO
x
NPs possessed
high catalytic hydrogen (H2) evolution activity, and the
highest turnover frequency (TOF) was 17.72 mol H2·mol–1 Cu·min–1. Comparative experiments
revealed that the high catalytic activity originated from the abundant
catalytic active sites of Cu/Ni-NiO
x
NPs.
The attachment of Ni-NiO
x
on the surface
of Cu NPs that dispersed on G (G-Cu/Ni-NiO
x
) can not only effectively improve the antioxidative performance
of Cu NPs under ambient conditions but also promote the methanolysis
of AB to produce H2.
Electrochemical water electrolysis is a potential green hydrogen energy generation technique. As the shortage of fresh water, the abundant seawater resources should be developed into the main raw material of...
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