Preparation of RuO₂/Nano-Graphite Cathode for Electrocatalytic Degradation of Phenol

摘要

A RuO2ano-graphite composite was prepared by the chemical precipitation strategy. The as-preparedsamples were characterized by SEM, XRD, XPS, AFM and Raman spectroscopy. RuO2 with a mixtureof amorphous hydrous and crystalline states was found on the surface of nano-graphite. RuO2ano- graphite, used as the cathode in a diaphragm cell with a Ti/IrO2/RuO2 anode, exhibited enhancedcatalytic activity in the electro-oxidation degradation of phenol. After 120 min electrolysis, theremoval efficiencies of phenol (100 mg/L) and COD (1200 mg/L) reached 95.3% and 88.6%,respectively. RuO2 could improve the generation of H2O2 by O2 reduction and accelerate theproduction of H from the decomposition of H2O2.