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gas-diffusion-electrodes
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The synergic generation of CO3[rad]− and O2[rad]− radicals in a novel photocatalytic fuel cell for efficient oxidation of carbonate-containing wastewater and simultaneous electricity production
, Article Applied Catalysis B: Environmental ; Volume 277 , 2020 ; Li, J ; Xia, L ; Wang, J ; Chen, S ; Zhang, Y ; Bai, J ; Li, L ; Zhou, T ; Rahim, M ; Xu, Q ; Zhou, B ; Sharif University of Technology
Elsevier B.V
2020
Abstract
The treatment of refractory wastewater and energy utilization are challenging environmental issues. Carbonate as the most common anion abounds in the aquatic environment. Here, we proposed a novel method to degrade carbonate-containing wastewater and simultaneous electricity generation via the combined oxidation of CO3[rad]− and O2[rad]− radicals. The CO3[rad]− radical was produced by the photoelectrode of TiO2/Si photovoltaic cell with the rear Si photovoltaic cell providing external bias, and the O2[rad]− radical was produced from the generation of H2O2 on a gas diffusion electrode (GDE), and they were both further enhanced from the activation reaction of H2O2 with HCO3− electrolyte. The...
High yield of CO and synchronous s recovery from the conversion of CO2 and H2S in natural gas based on a novel electrochemical reactor
, Article Environmental Science and Technology ; Volume 55, Issue 21 , 2021 , Pages 14854-14862 ; 0013936X (ISSN) ; Zhang, B ; Zhang, Y ; Zhou, C ; Wang, P ; Zha, L ; Li, J ; Simchi, A ; Zhou, B ; Sharif University of Technology
American Chemical Society
2021
Abstract
H2S and CO2 are the main impurities in raw natural gas, which needs to be purified before use. However, the comprehensive utilization of H2S and CO2 has been ignored. Herein, we proposed a fully resource-based method to convert toxic gas H2S and greenhouse gas CO2 synchronously into CO and elemental S by using a novel electrochemical reactor. The special designs include that, in the anodic chamber, H2S was oxidized rapidly to S based on the I−/I3− cyclic redox system to avoid anode passivation. On the other hand, in the cathodic chamber, CO2 was rapidly and selectively reduced to CO based on a porous carbon gas diffusion electrode (GDE) modified with polytetrafluoroethylene and cobalt...