Integrating Co(OH)2 nanosheet arrays on graphene for efficient noble-metal-free EY-sensitized photocatalytic H2 evolution

A hierarchical hybrid cocatalyst is constructed by in situ anchoring Co(OH) 2 nanosheet arrays on graphene. Using Eosin Y as a photosensitizer, the Co(OH) 2 -GR hybrid showed superior performance in photocatalytic H 2 evolution.