Hierarchical nickel–cobalt alloy pearl strings (NCPS) are successfully fabricated and exhibit superior electrocatalytic activity toward urea. The NCPS Ni4Co1 with an initial Ni/Co ratio of 4 : 1 delivers a current density… Click to show full abstract
Hierarchical nickel–cobalt alloy pearl strings (NCPS) are successfully fabricated and exhibit superior electrocatalytic activity toward urea. The NCPS Ni4Co1 with an initial Ni/Co ratio of 4 : 1 delivers a current density of 51.5 mA cm−2 at 0.5 V vs. Ag/AgCl, which is much higher than that of its metallic Ni metal counterpart, and a relatively low onset potential.
               
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