Electrocatalytic CO2 Reduction in Acetonitrile Enhanced by the Local Environment and Mass Transport of H2O

2022 ◽  
pp. 602-609
Author(s):  
Padmanabh B. Joshi ◽  
Nawaraj Karki ◽  
Andrew J. Wilson
Keyword(s):  
Mass Transport ◽  
Co2 Reduction ◽  
Local Environment

Mass Transport Control by Surface Graphene Oxide for Selective CO Production from Electrochemical CO2 Reduction

ACS Catalysis ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 3222-3231 ◽  
Author(s):  
Dang Le Tri Nguyen ◽  
Chan Woo Lee ◽  
Jonggeol Na ◽  
Min-Cheol Kim ◽  
Nguyen Dien Kha Tu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Mass Transport ◽  
Co2 Reduction ◽  
Electrochemical Co2 Reduction ◽  
Transport Control

scholarly journals Competition between CO2 Reduction and Hydrogen Evolution on a Gold Electrode under Well-Defined Mass Transport Conditions

2020 ◽  
Vol 142 (9) ◽  
pp. 4154-4161 ◽  
Author(s):  
Akansha Goyal ◽  
Giulia Marcandalli ◽  
Vladislav A. Mints ◽  
Marc T. M. Koper
Keyword(s):  
Mass Transport ◽  
Hydrogen Evolution ◽  
Gold Electrode ◽  
Co2 Reduction

scholarly journals Enhancing Electrocatalytic CO2 Reduction Using a System-Integrated Approach to Catalyst Discovery

2018 ◽  
Author(s):  
Thomas Burdyny ◽  
Wilson A. Smith
Keyword(s):  
Mass Transport ◽  
Electrochemical Cell ◽  
Co2 Reduction ◽  
Integrated Approach ◽  
Reduction Reaction ◽  
Reaction Conditions ◽  
Alkaline Reaction ◽  
Electrochemical Co2 Reduction ◽  
Current Densities ◽  
Co2 Reduction Reaction

The presented modelling results in this article show that electrochemical CO2 reduction performed at commercially-relevant current densities will ultimately lead to locally alkaline reaction conditions regardless of the electrolyte, configuration and reasonable mass transport scenarios. Discussed in detail are the large implications that this result has for the CO2 reduction reaction itself, and the current way in which catalysts are designed and tested in different electrochemical cell architectures.

scholarly journals Mitigating Mass Transport Limitations: Hierarchical Nanoporous Gold Flow-Through Electrodes for Electrochemical CO2 Reduction

2021 ◽  
Author(s):  
Zhen Qi ◽  
Steven A Hawks ◽  
Corie Horwood ◽  
Jürgen Biener ◽  
Monika M. Biener
Keyword(s):  
Mass Transport ◽  
Diffusion Rate ◽  
Co2 Reduction ◽  
Reaction Rates ◽  
Nanoporous Gold ◽  
Aqueous Electrolytes ◽  
Low Concentration ◽  
Electrochemical Co2 Reduction ◽  
Flow Through ◽  
And Diffusion

The reaction rates for electrochemical CO2 reduction in aqueous electrolytes can be limited by the low concentration and diffusion rate of the reactant CO2. To overcome this limitation, we fabricated...

scholarly journals Testing a Silver Nanowire Catalyst for the Selective CO2 Reduction in a Gas Diffusion Electrode Half-cell Setup Enabling High Mass Transport Conditions

2019 ◽  
Vol 73 (11) ◽  
pp. 922-927 ◽  
Author(s):  
María de Jesús Gálvez-Vázquez ◽  
Shima Alinejad ◽  
Huifang Hu ◽  
Yuhui Hou ◽  
Pavel Moreno-García ◽  
...  
Keyword(s):  
Mass Transport ◽  
Co2 Reduction ◽  
Reaction Rates ◽  
Gas Diffusion ◽  
Reduction Reaction ◽  
Liquid Electrolyte ◽  
Gas Diffusion Electrode ◽  
Silver Nanowire ◽  
High Mass ◽  
Half Cell

In this work, we discuss the application of a gas diffusion electrode (GDE) setup for benchmarking electrocatalysts for the reductive conversion of CO2 (CO2 RR: CO2 reduction reaction). Applying a silver nanowire (Ag-NW) based catalyst, it is demonstrated that in the GDE setup conditions can be reached, which are relevant for the industrial conversion of CO2 to CO. This reaction is part of the so-called 'Rheticus' process that uses the CO for the subsequent production of butanol and hexanol based on a fermentation approach. In contrast to conventional half-cell measurements using a liquid electrolyte, in the GDE setup CO2 RR current densities comparable to technical cells (>100 mA cm–2) are reached without suffering from mass transport limitations of the CO2 reactant gas. The results are of particular importance for designing CO2 RR catalysts exhibiting high faradaic efficiencies towards CO at technological reaction rates.

scholarly journals Recent Advances in the Catalyst Design and Mass Transport Control for the Electrochemical Reduction of Carbon Dioxide to Formate

Catalysts ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 859 ◽  
Author(s):  
Muhammad Alfath ◽  
Chan Woo Lee
Keyword(s):  
Mass Transport ◽  
Electrochemical Reduction ◽  
Active Sites ◽  
Co2 Reduction ◽  
Aqueous Solubility ◽  
Reduction Reaction ◽  
Catalyst Design ◽  
Catalyst Composition ◽  
Reduction Of Co2 ◽  
Formate Production

Closing the carbon cycle by the electrochemical reduction of CO2 to formic acid and other high-value chemicals is a promising strategy to mitigate rapid climate change. The main barriers to commercializing a CO2 reduction reaction (CO2RR) system for formate production are the chemical inertness, low aqueous solubility, and slow mass transport characteristics of CO2, along with the low selectivity and high overpotential observed in formate production via CO2 reduction. To address those problems, we first explain the possible reaction mechanisms of CO2RRs to formate, and then we present and discuss several strategies to overcome the barriers to commercialization. The electronic structure of the catalyst can be tuned to favor a specific intermediate by adjusting the catalyst composition and tailoring the facets, edges, and corners of the catalyst to better expose the active sites, which has primarily led to increased catalytic activity and selectivity. Controlling the local pH, employing a high-pressure reactor, and using systems with three-phase boundaries can tune the mass transport properties of reactants at the catalyst surface. The reported electrocatalytic performances are summarized afterward to provide insight into which strategies have critical effects on the production of formate.

scholarly journals Enhancing Electrocatalytic CO2 Reduction Using a System-Integrated Approach to Catalyst Discovery

2018 ◽  
Author(s):  
Thomas Burdyny ◽  
Wilson A. Smith
Keyword(s):  
Mass Transport ◽  
Electrochemical Cell ◽  
Co2 Reduction ◽  
Integrated Approach ◽  
Reduction Reaction ◽  
Reaction Conditions ◽  
Alkaline Reaction ◽  
Electrochemical Co2 Reduction ◽  
Current Densities ◽  
Co2 Reduction Reaction

The presented modelling results in this article show that electrochemical CO2 reduction performed at commercially-relevant current densities will ultimately lead to locally alkaline reaction conditions regardless of the electrolyte, configuration and reasonable mass transport scenarios. Discussed in detail are the large implications that this result has for the CO2 reduction reaction itself, and the current way in which catalysts are designed and tested in different electrochemical cell architectures.

Models of Thermodynamic Properties of Prominences

1979 ◽  
Vol 44 ◽  
pp. 349-355
Author(s):  
R.W. Milkey
Keyword(s):  
Thermodynamic Properties ◽  
Mass Transport ◽  
Emission Spectrum ◽  
Thermodynamic Parameters ◽  
Working Group ◽  
Physical Processes ◽  
Theoretical Concepts ◽  
Group 3 ◽  
Observational Techniques

The focus of discussion in Working Group 3 was on the Thermodynamic Properties as determined spectroscopically, including the observational techniques and the theoretical modeling of physical processes responsible for the emission spectrum. Recent advances in observational techniques and theoretical concepts make this discussion particularly timely. It is wise to remember that the determination of thermodynamic parameters is not an end in itself and that these are interesting chiefly for what they can tell us about the energetics and mass transport in prominences.

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