Transient Techniques for Investigating Mass-Transport Limitations in Gas Diffusion Electrodes

2003 ◽  
Vol 150 (12) ◽  
pp. A1711 ◽  
Author(s):  
Frédéric Jaouen ◽  
Göran Lindbergh ◽  
Katarina Wiezell
Keyword(s):  
Mass Transport ◽  
Gas Diffusion ◽  
Gas Diffusion Electrodes ◽  
Transient Techniques

Elucidating Mass Transport Regimes in Gas Diffusion Electrodes for CO2 Electroreduction

2021 ◽  
pp. 3600-3606
Author(s):  
Thomas Moore ◽  
Xiaoxing Xia ◽  
Sarah E. Baker ◽  
Eric B. Duoss ◽  
Victor A. Beck
Keyword(s):  
Mass Transport ◽  
Gas Diffusion ◽  
Gas Diffusion Electrodes ◽  
Co2 Electroreduction

Gas Diffusion Electrodes (GDEs) for Electrochemical Reduction of Carbon Dioxide, Carbon Monoxide, and Dinitrogen to Value-added Products: A Review

2021 ◽  
Author(s):  
Hesamoddin Rabiee ◽  
Lei Ge ◽  
Xueqin Zhang ◽  
Shihu Hu ◽  
Mengran Li ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Mass Transport ◽  
Electrochemical Reduction ◽  
Value Added ◽  
Gas Diffusion ◽  
Practical Application ◽  
Gas Diffusion Electrodes ◽  
Chemical Production ◽  
Value Added Products

Electrochemical reduction of gaseous feeds such as CO2, CO, and N2 holds promise for sustainable energy and chemical production. Practical application of this technology is impeded by slow mass transport...

Compact and efficient gas diffusion electrodes based on nanoporous alumina membranes for microfuel cells and gas sensors

The Analyst ◽  
2020 ◽  
Vol 145 (1) ◽  
pp. 122-131 ◽  
Author(s):  
Wanda V. Fernandez ◽  
Rocío T. Tosello ◽  
José L. Fernández
Keyword(s):  
Response Times ◽  
Hydrogen Oxidation ◽  
Fast Response ◽  
Gas Diffusion ◽  
Limiting Current ◽  
Gas Diffusion Electrodes ◽  
Nanoporous Alumina ◽  
Alumina Membranes ◽  
Current Densities ◽  
Microfuel Cells

Gas diffusion electrodes based on nanoporous alumina membranes electrocatalyze hydrogen oxidation at high diffusion-limiting current densities with fast response times.

scholarly journals Electrokinetic and in situ spectroscopic investigations of CO electrochemical reduction on copper

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jing Li ◽  
Xiaoxia Chang ◽  
Haochen Zhang ◽  
Arnav S. Malkani ◽  
Mu-jeng Cheng ◽  
...  
Keyword(s):  
Mass Transport ◽  
Active Sites ◽  
Gas Diffusion ◽  
Reduction Reaction ◽  
Adsorbed Hydrogen ◽  
Diffusion Type ◽  
Proton Coupled Electron Transfer ◽  
Alkaline Electrolytes ◽  
Reaction Orders

AbstractRigorous electrokinetic results are key to understanding the reaction mechanisms in the electrochemical CO reduction reaction (CORR), however, most reported results are compromised by the CO mass transport limitation. In this work, we determined mass transport-free CORR kinetics by employing a gas-diffusion type electrode and identified dependence of catalyst surface speciation on the electrolyte pH using in-situ surface enhanced vibrational spectroscopies. Based on the measured Tafel slopes and reaction orders, we demonstrate that the formation rates of C2+ products are most likely limited by the dimerization of CO adsorbate. CH4 production is limited by the CO hydrogenation step via a proton coupled electron transfer and a chemical hydrogenation step of CO by adsorbed hydrogen atom in weakly (7 < pH < 11) and strongly (pH > 11) alkaline electrolytes, respectively. Further, CH4 and C2+ products are likely formed on distinct types of active sites.

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