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

Author:
Xu, Peng, Xu, Hao, Zheng, Dayang, Ma, Jingwei, Hou, Baolin
Source:
Chemosphere 2019 v.237
ISSN:
0045-6535
Subject:
air flow, electric potential difference, electricity generation, electrochemistry, electrodialysis, energy efficiency, fuel cells, hydrogen peroxide, photocatalysis
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 (ηE) 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.
Agid:
6560521