Superhydrophilic nickel cyclotetraphosphate for the hydrogen evolution reaction in acidic solution

Nickel cyclotetraphosphate grown on carbon cloth (Ni2P4O12/CC) is synthesized via an anion exchange reaction method and it shows excellent hydrogen evolution reaction (HER) activity and strong working stability in acid due to the merits of its unique polymer-like structure, mesoporous characteristics, and superhydrophilic surface.