The reverse electrodialysis driven electrochemical process assisted by anodic photocatalysis for hydrogen peroxide production

Abstract

A novel system combined with photocatalytic fuel cell and electrochemical system assisted by reverse electrodialysis (PREC) is proposed for H₂O₂ production and electricity generation. Results demonstrated the H₂O₂ concentration increased gradually with time and reached around 940 mg/L at 24 h. The optimum air flow rate was 15 L/min. The current efficiency was 31.3%. The maximum short-circuit current density, maximum open-circuit voltage and maximum power density were 0.95 mA/cm², 1.52 V and 68 W/m². The salinity-driven potential, created with the five pairs of the HC and LC cells in the PREC, was calculated to be 0.72 V. Additionally, the energy efficiency (η_E) was 40.5%. The integrated system is confirmed to be serviced as an efficient technology for H₂O₂ electro-genneration and salinity-gradient energy utilization simultaneously.

Keywords: Electricity generation; Electrochemical; H(2)O(2); Photocatalytic fuel cell; Reverse electrodialysis.