▎ 摘　　要

NOVELTY - Phosphorus-doped graphene oxide redox electrocatalyst comprises graphene oxide substrate and reactive phosphorus element doped or attached on carbon skeleton of graphene oxide substrate. USE - The catalyst is useful: as a fuel battery and metal-air battery cathode electrodeposition catalyst; as an electrode material for lithium ion battery, sodium ion battery, super capacitor, electrochemical energy storage and conversion device; and in electrochemical sensors and biosensors (all claimed). ADVANTAGE - The electrocatalyst has high catalytic activity. The method is free of methanol and carbon monoxide poisoning; and has high stability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the catalyst, comprising (a) preparing graphite oxide using colloidal graphite, carrying out Hummer method to prepare graphite oxide, (b) uniformly mixing graphite oxide and phosphorus-containing ionic liquid in a mass ratio of 1:1, ultrasonically dispersing graphite oxide in the phosphorus-containing ionic liquid (ethanol solution of 1-butyl-3-methylimidazolium hexafluorophosphate (BmimPF6)), (c) drying the dispersion liquid in an oven at 45 degrees C for 24 hours under vacuum, and (d) transferring the dried mixture into an inert atmosphere, processing at 200-1000 degrees C.