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Updated: Feb 14, 2026

Author Spotlight: Design and Evaluation of Au-Electroplated Carbon Fiber Cloth Electrodes for Hydrogen Peroxide Fuel Cells
Published on: October 20, 2023
Acid pretreatment of three-dimensional graphite cathodes enhances the hydrogen peroxide synthesis in
Nan Li1, Shu Wang1, Jingkun An1
1Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, PR China.
Abstract:
Graphite is a potential catalyst for hydrogen peroxide (H2O2) synthesis in bioelectrochemical systems (BESs) because of its high performance and low cost. In this study, acidic pretreatment method was performed on raw graphite powder to optimize the performance of three-dimensional graphite cathode and increase the H2O2 yield. Through this method, the production rate of H2O2 increased by 46.9% after 20% nitric acid (HNO3) pretreatment and reached up to 1.55 mg·L-1·h-1, while the chemical oxygen demand (COD) removal efficiency increased by 54%. The high micropore surface area of the acid-pretreated graphite cathode (23.32 m2·g) enhanced the oxygen reduction reaction (ORR) in the electrode and subsequently increased the Faradic efficiency and maximum power density by 25% and 45%, respectively. Thus, this approach has potential for H2O2 synthesis.
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