Wire-on-flake heterostructured ternary Co 0.5 Ni 0.5 P/CC: an efficient hydrogen evolution electrocatalyst

Illustration of the formation of ternary composites with different morphologies when changing the relative molar ratios of non-noble-metal precursors. The wire-on-flake morphology exists when the molar ratio of Co(NO 3 ) 2 ·6H 2 O and Ni(NO 3 ) 2 ·6H 2 O is 1 : 1. When adding more Co(NO 3 ) 2 ·6H 2 O, the morphology becomes a nanowire morphology, and when adding more Ni(NO 3 ) 2 ·6H 2 O, the morphology becomes a nanoflake morphology.