A nanohybrid of platinum nanoparticles-porous ZnO spheres-hemin was synthesized.
Hemin was adsorbed onto Pt–pZnO by ester-like binding between hemin and ZnO.
Alkaline phosphatase catalyzed 1-naphthyl phosphate and in situ produce electroactive substance 1-naphthol.
Pt–pZnO–hemin exhibited electrocatalytic activity toward 1-naphthol.