A facile in situ partial surface‐oxidation strategy to integrate CoO domains with CoSe2 nanobelts on Ti mesh (denoted as CoO/CoSe2) via direct calcination of CoSe2‐diethylenetriamine precursors is reported. The resulted self‐supported CoO/CoSe2 exhibits an outstanding activity and stability in neutral media toward both hydrogen evolution reaction and oxygen evolution reaction.

Dendritic Pt-Ni-P alloy NPs with different chemical compositions were successfully synthesized via a facile wet-chemical route. Owing to the unique dendritic nanostructures and synergistic electronic effects of P, Ni, and Pt atoms, the as-prepared dendritic Pt-Ni-P alloy NPs exhibit a higher electrocatalytic activity than dendritic Pt-Ni alloy NPs and commercial Pt/C.