An evaluation of electrocatalytic activity and stability for air electrodes

Burchardt, Trygve

doi:10.1016/j.jpowsour.2004.03.072

Cited by 36 publications

(30 citation statements)

References 12 publications

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“…The US Department of Energy funded a research project at Los Alamos National Laboratory where carbon-based electrodes were developed and tested in a fuel cell type zero-gap cell for chlor-alkali electrolysis [95]. Recently, SINTEF in Norway [96] and the Royal Institute of Technology in Sweden [97] started research targeted at the development and investigation of carbon-based electrodes.…”

Section: Principle Of Chlor-alkali Electrolysis With Oxygen Depolarizmentioning

confidence: 99%

Chlor-alkali electrolysis with oxygen depolarized cathodes: history, present status and future prospects

et al. 2008

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The historical development, current status and future prospects of chlor-alkali electrolysis with oxygen depolarized cathodes (ODCs) are summarized. Over the last decades, membrane chlor-alkali technology has been optimized to such an extent that no substantial reduction of the energy demand can be expected from further process modifications. However, replacement of the hydrogen evolving cathodes in the classical membrane cells by ODCs allows for reduction of the cell voltage and correspondingly the energy consumption of up to 30%. This replacement requires the development of appropriate cathode materials and novel electrolysis cell designs. Due to their superior long-term stability, ODCs based on silver catalysts are very promising for oxygen reduction in concentrated NaOH solutions. Finite-gap falling film cells appear to be the technically most mature design among the several ODC electrolysis cells that have been investigated.

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Section: Principle Of Chlor-alkali Electrolysis With Oxygen Depolarizmentioning

confidence: 99%

Chlor-alkali electrolysis with oxygen depolarized cathodes: history, present status and future prospects

et al. 2008

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“…Hence, severe effects of CO 2 depletion could occur in the FB configuration, hindering the electrode's performance. Moreover, catholyte that flows at the opposite side of the GDE can flood the GDE, typically due to electrowetting, blocking CO 2 diffusion paths which increases the concentration gradient even more . This electrolyte flux is, however, crucial to avoid crystallization inside the pores of the carbon paper .…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, catholyte that flows at the opposite side of the GDE can flood the GDE, typically due to electrowetting, blocking CO 2 diffusion paths which increases the concentration gradient even more. [11] This electrolyte flux is, however, crucial to avoid crystallization inside the pores of the carbon paper. [12] Therefore, the differential pressure across the GDE is a factor to take into account in the optimization of the cathodic performance as we thoroughly analyzed in previous work.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Reduction of CO₂: Effect of Convective CO₂ Supply in Gas Diffusion Electrodes

et al. 2019

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The electrochemical reduction of carbon dioxide (CO2) is a promising technology in light of energy transition and industrial electrification. In this study, two different electrolyzer configurations, flow‐through and flow‐by modes, were analyzed for the production of carbon monoxide to resolve the CO2 mass‐transfer limitation problem at high current densities in gas diffusion electrodes. These two configurations respectively state convective and diffusive flow inside the gas diffusion layer, and their effect was studied on the cathodic performance of the electrolyzer by varying the operating conditions: cathodic potential, electrocatalyst loading, and Nafion content. In flow‐through configuration, a current density of 220 mA/cm2 could be achieved at a faradaic efficiency of 90 %; whereas, in the flow‐by configuration, the current density was at the same faradaic efficiency limited to 140 mA/cm2. However, the flow‐through configuration has a few limitations, such as lower energy efficiency, owing to the higher ohmic drop and the faster deactivation caused by crystallization of electrolyte salts inside the gas diffusion electrode. Therefore, flow‐by mode is currently the most adequate configuration for the long‐term operation of electrolyzers for the reduction of CO2 to CO. This study represents an essential step toward the application of electrolyzers for the electroreduction of CO2.

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“…leading to carbonate formation [5,6]. When insoluble carbonates precipitate inside air electrode porosity, the electrode structure is damaged leading to a decrease in the electrochemical activity [7]. This side reaction has been identified as the main cause of ageing of air electrodes working in alkaline electrolyte [8].…”

Section: Introductionmentioning

confidence: 99%

Assemblies of protective anion exchange membrane on air electrode for its efficient operation in aqueous alkaline electrolyte

Bertolotti

Chikh

Vancaeyzeele

et al. 2015

Journal of Power Sources

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An evaluation of electrocatalytic activity and stability for air electrodes

Cited by 36 publications

References 12 publications

Chlor-alkali electrolysis with oxygen depolarized cathodes: history, present status and future prospects

Chlor-alkali electrolysis with oxygen depolarized cathodes: history, present status and future prospects

Electrochemical Reduction of CO₂: Effect of Convective CO₂ Supply in Gas Diffusion Electrodes

Assemblies of protective anion exchange membrane on air electrode for its efficient operation in aqueous alkaline electrolyte

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An evaluation of electrocatalytic activity and stability for air electrodes

Cited by 36 publications

References 12 publications

Chlor-alkali electrolysis with oxygen depolarized cathodes: history, present status and future prospects

Chlor-alkali electrolysis with oxygen depolarized cathodes: history, present status and future prospects

Electrochemical Reduction of CO2: Effect of Convective CO2 Supply in Gas Diffusion Electrodes

Assemblies of protective anion exchange membrane on air electrode for its efficient operation in aqueous alkaline electrolyte

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Electrochemical Reduction of CO₂: Effect of Convective CO₂ Supply in Gas Diffusion Electrodes