Electrochemical Study of H2O2 Decomposition on the Magnetite Bulk Electrode
32nd Annual CNS Conference - 2011 June 05-08


Presented at:
32nd Annual CNS Conference
2011 June 05-08
Location:
Niagara Falls, Canada
Session Title:
Materials, Degredation and Issues

Authors:
Hamidreza Zebardast (University of British Columbia)
Edouard Asselin (University of British Columbia)
Steven Rogak (University of British Columbia)
  

Abstract

The high operating temperature and pressure in the heat transport system of Supercritical Water Reactors (SCWRs) can induce fouling in coolant tubes. Magnetite as a major component of foulants has large impacts on the water chemistry and corrosion of these systems since it is known as a catalyzer for decomposition of hydrogen peroxide. This study aimed to investigate the electrochemical kinetics of hydrogen peroxide decomposition on bulk magnetite electrodes using open circuit potential measurement, potentiodynamic and electrochemical impedance spectroscopy methods. Tafel slope and diffusion coefficient were estimated for different concentrations of hydrogen peroxide at pH=9.5 in the 0.1M NaClO4 solution containing 0.01M Na2B4O7 as a buffer.

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