Electrochemical generation of hydrogen peroxide from dissolved oxygen in acidic solutions

摘要

Hydrogen peroxide (H_2O_2) was electro-generated in a parallel-plate electrolyzer by reduction of dissolved oxygen (DO) in acidic solutions containing dilute supporting electrolyte. Operational parameters such as cathodic potential, oxygen purity and mass flow rate, cathode surface area, pH, temperature, and inert supporting electrolyte concentration were systematically investigated as to improve the Faradic current efficiency of H_2O_2 generation. Results indicate that significant self-decomposition of H_2O_2 only occurs at high pH (>9) and elevated temperatures (>23 deg. C).