scholarly journals CO2 reduction on gas-diffusion electrodes and why catalytic performance must be assessed at commercially-relevant conditions

2019 ◽  
Vol 12 (5) ◽  
pp. 1442-1453 ◽  
Author(s):  
Thomas Burdyny ◽  
Wilson A. Smith
Keyword(s):  
Local Reaction ◽  
Co2 Reduction ◽  
Catalytic Performance ◽  
Gas Diffusion ◽  
High Current ◽  
Gas Diffusion Electrodes ◽  
Current Densities ◽  
Current Practices

The substantial implications of high current densities on the local reaction environment and design of catalysts for electrochemical CO2 reduction are addressed. The presented perspectives also reflect on current practices within the field and offer new opportunities for both future catalyst and system-focused research efforts.

scholarly journals Operando Topography and Mechanical Property Mapping of CO2 Reduction Gas-Diffusion Electrodes Operating at High Current Densities

2021 ◽  
Author(s):  
Nathan Nesbitt ◽  
Wilson Smith
Keyword(s):  
Mechanical Property ◽  
Best Practices ◽  
Co2 Reduction ◽  
Gas Diffusion ◽  
High Current ◽  
Gas Diffusion Electrodes ◽  
Reactor Operation ◽  
Research Article ◽  
Depth Analysis ◽  
Current Densities

<p>Here, in this research article we develop an electrochemical flow cell for EC-AFM of GDEs for CO<sub>2</sub>R and provide an in-depth analysis of challenges, best practices, and possible future improvements for the technique. Specifically, we demonstrate continuous operando EC-AFM topography and mechanical property map recording during CO<sub>2</sub>R reactor operation at 1, 10, and 100 mA cm<sup>-2</sup>.<b></b></p>

scholarly journals Operando Topography and Mechanical Property Mapping of CO2 Reduction Gas-Diffusion Electrodes Operating at High Current Densities

2021 ◽  
Author(s):  
Nathan Nesbitt ◽  
Wilson Smith
Keyword(s):  
Mechanical Property ◽  
Best Practices ◽  
Co2 Reduction ◽  
Gas Diffusion ◽  
High Current ◽  
Gas Diffusion Electrodes ◽  
Reactor Operation ◽  
Research Article ◽  
Depth Analysis ◽  
Current Densities

<p>Here, in this research article we develop an electrochemical flow cell for EC-AFM of GDEs for CO<sub>2</sub>R and provide an in-depth analysis of challenges, best practices, and possible future improvements for the technique. Specifically, we demonstrate continuous operando EC-AFM topography and mechanical property map recording during CO<sub>2</sub>R reactor operation at 1, 10, and 100 mA cm<sup>-2</sup>.<b></b></p>

scholarly journals B‐Cu‐Zn gas diffusion electrodes for CO2 electroreduction to C2+ products at high current densities

2021 ◽  
Author(s):  
Yanfang Song ◽  
Joao R. C. Junqueira ◽  
Nivedita Sikdar ◽  
Denis Öhl ◽  
Stefan Dieckhöfer ◽  
...  
Keyword(s):  
Gas Diffusion ◽  
High Current ◽  
Gas Diffusion Electrodes ◽  
Co2 Electroreduction ◽  
Current Densities

scholarly journals B‐Cu‐Zn gas diffusion electrodes for CO2 electroreduction to C2+ products at high current densities

2021 ◽  
Author(s):  
Yanfang Song ◽  
Joao R. C. Junqueira ◽  
Nivedita Sikdar ◽  
Denis Öhl ◽  
Stefan Dieckhöfer ◽  
...  
Keyword(s):  
Gas Diffusion ◽  
High Current ◽  
Gas Diffusion Electrodes ◽  
Co2 Electroreduction ◽  
Current Densities

scholarly journals Water Activity Regulates CO2 Reduction in Gas-Diffusion Electrodes

2021 ◽  
Author(s):  
Nathan Nesbitt ◽  
Wilson Smith
Keyword(s):  
Gas Phase ◽  
Paradigm Shift ◽  
Reaction Rate ◽  
Co2 Reduction ◽  
Gas Diffusion ◽  
Equilibrium Potential ◽  
Gas Diffusion Electrodes ◽  
Reaction Thermodynamics ◽  
Current Densities ◽  
Reaction Equilibrium

<p>Electrochemical CO<sub>2</sub> reduction has recently reached current densities as high as 1 A cm<sup>-2</sup>, enabled by improving diffusion of CO<sub>2</sub> from the gas phase to the electrocatalyst by use of gas-diffusion electrodes (GDEs) and by improving electrolyte ionic conductivity with concentrated hydroxide electrolytes (7 M KOH). Despite such high solute concentrations, the dilute electrolyte assumption is commonly used to evaluate the thermodynamics of the system, specifically reaction equilibrium potential and reaction rate expression. Here we establish a paradigm shift by demonstrating how to properly include the activity of water and solutes and highlighting corrections to associated reaction thermodynamics.</p>

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