Direct formation of dendritic Ag catalyst on a gas diffusion layer for electrochemical CO2 reduction to CO and H2

2018 ◽  
Vol 43 (24) ◽  
pp. 11315-11325 ◽  
Author(s):  
Yu Seok Ham ◽  
Myung Jun Kim ◽  
Taeho Lim ◽  
Dong-Kwon Kim ◽  
Soo-Kil Kim ◽  
...  
Keyword(s):  
Diffusion Layer ◽  
Co2 Reduction ◽  
Gas Diffusion Layer ◽  
Gas Diffusion ◽  
Electrochemical Co2 Reduction ◽  
Direct Formation ◽  
Ag Catalyst

A Copper Based Catalyst for the CO2 Reduction Electrochemically Synthesized on a Gas Diffusion Layer

2020 ◽  
Vol MA2020-02 (56) ◽  
pp. 3875-3875
Author(s):  
Martina Serafini ◽  
Federica Mariani ◽  
Andrea Fasolini ◽  
Erika Scavetta ◽  
Domenica Tonelli ◽  
...  
Keyword(s):  
Diffusion Layer ◽  
Co2 Reduction ◽  
Gas Diffusion Layer ◽  
Gas Diffusion ◽  
Copper Based Catalyst

Proton-exchange membrane CO2 electrolyzer for CO production using Ag catalyst directly electrodeposited onto gas diffusion layer

2019 ◽  
Vol 437 ◽  
pp. 226898 ◽  
Author(s):  
Yu Seok Ham ◽  
Young Sang Park ◽  
Ara Jo ◽  
Jong Hyun Jang ◽  
Soo-Kil Kim ◽  
...  
Keyword(s):  
Diffusion Layer ◽  
Proton Exchange Membrane ◽  
Gas Diffusion Layer ◽  
Gas Diffusion ◽  
Proton Exchange ◽  
Ag Catalyst ◽  
Exchange Membrane

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.

Implications of polymer electrolyte fuel cell exposure to synchrotron radiation on gas diffusion layer water distribution

2014 ◽  
Vol 245 ◽  
pp. 796-800 ◽  
Author(s):  
Jens Eller ◽  
Jörg Roth ◽  
Federica Marone ◽  
Marco Stampanoni ◽  
Alexander Wokaun ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Synchrotron Radiation ◽  
Polymer Electrolyte ◽  
Diffusion Layer ◽  
Water Distribution ◽  
Gas Diffusion Layer ◽  
Gas Diffusion ◽  
Polymer Electrolyte Fuel Cell
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