Fabrication of graphene@graphite-based gas diffusion electrode for improving H2O2 generation in Electro-Fenton process

2018 ◽  
Vol 260 ◽  
pp. 112-120 ◽  
Author(s):  
Zhihong Zhang ◽  
Hongshan Meng ◽  
Yujing Wang ◽  
Limin Shi ◽  
Xue Wang ◽  
...  
Keyword(s):  
Gas Diffusion ◽  
Gas Diffusion Electrode ◽  
Fenton Process ◽  
H2o2 Generation

Efficient degradation of rhodamine B using modified graphite felt gas diffusion electrode by electro-Fenton process

2016 ◽  
Vol 23 (12) ◽  
pp. 11574-11583 ◽  
Author(s):  
Jiangnan Tian ◽  
Ayobami Matthew Olajuyin ◽  
Tingzhen Mu ◽  
Maohua Yang ◽  
Jianmin Xing
Keyword(s):  
Rhodamine B ◽  
Gas Diffusion ◽  
Gas Diffusion Electrode ◽  
Fenton Process ◽  
Graphite Felt

scholarly journals Degradation of Dipyrone by the Electro-Fenton Process in an Electrochemical Flow Reactor with a Modified Gas Diffusion Electrode

2014 ◽  
Author(s):  
Willyam R. P. Barros ◽  
Michelle P. Borges ◽  
Rafael M. Reis ◽  
Robson S. Rocha ◽  
Rodnei Bertazzoli ◽  
...  
Keyword(s):  
Flow Reactor ◽  
Gas Diffusion ◽  
Gas Diffusion Electrode ◽  
Fenton Process

scholarly journals Investigation of Gas Diffusion Electrode Systems for the Electrochemical CO2 Conversion

Catalysts ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 482
Author(s):  
Hilmar Guzmán ◽  
Federica Zammillo ◽  
Daniela Roldán ◽  
Camilla Galletti ◽  
Nunzio Russo ◽  
...  
Keyword(s):  
Carbon Capture ◽  
Active Sites ◽  
Co2 Reduction ◽  
Gas Diffusion ◽  
Gas Diffusion Electrode ◽  
Catalyst Loading ◽  
Co2 Conversion ◽  
Atmospheric Conditions ◽  
Electrochemical Co2 Reduction ◽  
Liquid Products

Electrochemical CO2 reduction is a promising carbon capture and utilisation technology. Herein, a continuous flow gas diffusion electrode (GDE)-cell configuration has been studied to convert CO2 via electrochemical reduction under atmospheric conditions. To this purpose, Cu-based electrocatalysts immobilised on a porous and conductive GDE have been tested. Many system variables have been evaluated to find the most promising conditions able to lead to increased production of CO2 reduction liquid products, specifically: applied potentials, catalyst loading, Nafion content, KHCO3 electrolyte concentration, and the presence of metal oxides, like ZnO or/and Al2O3. In particular, the CO productivity increased at the lowest Nafion content of 15%, leading to syngas with an H2/CO ratio of ~1. Meanwhile, at the highest Nafion content (45%), C2+ products formation has been increased, and the CO selectivity has been decreased by 80%. The reported results revealed that the liquid crossover through the GDE highly impacts CO2 diffusion to the catalyst active sites, thus reducing the CO2 conversion efficiency. Through mathematical modelling, it has been confirmed that the increase of the local pH, coupled to the electrode-wetting, promotes the formation of bicarbonate species that deactivate the catalysts surface, hindering the mechanisms for the C2+ liquid products generation. These results want to shine the spotlight on kinetics and transport limitations, shifting the focus from catalytic activity of materials to other involved factors.

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