Impact of the PiperION Anion Exchange Membrane Thickness on the Performance of a CO₂-to-HCOOH Three-Compartment Electrolyzer

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(9), P. 3986 - 3996

Published: Feb. 22, 2024

The electrochemical reduction of CO2 to formic acid (HCOOH) is a sustainable synthetic approach with the potential substitute for energy-demanding conventional processes. In this framework, three-compartment electrolyzer presents crucial technological advancement, facilitating direct production diluted HCOOH in center compartment, which separated from anode and cathode by cation anion exchange membranes (CEM AEM), respectively. However, impact AEM on both selectivity energy consumption remains largely unexplored. Herein, use PiperION AEMs, investigated under different thicknesses (13–80 μm), current densities (200–500 mA cm–2), compartment flow rates (50–200 μL min–1), confirms that acts as barrier between acidic alkaline cathodic compartment. Thicker AEMs provide optimal media manifested enhanced catalytic efficiency (FEFA up 84%). thinnest membrane (13 μm) yields diminished performance terms faradaic HCOOH, whereas thickest (80 shows high cell voltages limiting applicable densities. medium thick (22 35) present efficiencies = 76%) low specific consumptions (QFA 5.9 kWh kg–1) increased concentrations (c 2.3 mol L–1), given their shielding effects while maintaining moderate (U 3.8 V).

Language: Английский

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ACS Spotlight: Bipolar Membranes for Electrochemical Energy Conversion, Chemical Manufacturing, and Separations

ACS Applied Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: April 5, 2024

Sustainable energy conversion, chemical manufacturing, and separations are central to addressing the world's environmental challenges. Electrochemical platforms stand as a cornerstone in these challenges because they low exergy can be powered on renewable electrons. In electrochemical systems, bipolar membranes (BPMs) emerging unique class of ion exchange poised revolutionize various processes via pH control anode cathode chambers situ adjustment. this Spotlight Review, we provide comprehensive review utilizing BPMs for conversion (water electrolyzers hydrogen production, fuel cells, flow batteries), manufacturing (electrolyzers that convert carbon dioxide into value-added chemicals nitrate ammonia), separations. The motivation using BPMs, well their performance durability, disseminated. We also discuss current impede BPM systems from competing with state-of-the-art monopolar ion-exchange (e.g., anion/hydroxide cation/proton membranes). covers molecular modeling continuum efforts understand basic mechanisms govern performance.

Language: Английский

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Alternative anode paired to electrocatalytic CO2 reduction

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 94, P. 72 - 79

Published: Nov. 10, 2024

Language: Английский

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Cation Crossover Limits Accessible Current Densities for Zero-Gap Alkaline CO₂ Reduction to Ethylene

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 8, 2025

Traditional CO2 reduction systems often fail in an alkaline environment due to the interaction of with a high-pH electrolyte, where carbonate and bicarbonate ion formation results potassium-containing salt precipitation. The presence crystals causes selectivity electrolyzer toward conversion. Here, critical operational variables, which elicit salting out process, are investigated (i.e., transport). When exceeds current density, H2 evolution dominates formation, is confirmed by postmortem cross-sectional SEM-EDS electrode. density decreases increasing membrane thickness or anolyte ionic strength. Cathode mediated unmitigated crossover cations from cathode across anion exchange membrane, through imperfectly excluded. It likely that electric field-driven migration promotes increase concentration potassium until, at for arrangement, ions solubility limit KHCO3, leading

Language: Английский

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Electrocatalytic C–C coupling of CO₂ and formaldehyde to synthesize acetate via membrane electrode assembly

Green Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

A novel strategy for acetate production from electrocatalytic coupling of carbon dioxide and formaldehyde in a membrane electrode assembly cell is reported.

Language: Английский

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Tandem Routes for Converting Carbon Dioxide to High-Value Hydrocarbons: The Roads to Renewable Chemicals and Fuels

Chemistry of Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 22, 2025

Language: Английский

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Boosting electroreduction CO2 reduction to formate at ampere level over La doped Bi catalyst

Sustainable Chemistry and Pharmacy, Journal Year: 2025, Volume and Issue: 44, P. 101973 - 101973

Published: Feb. 28, 2025

Language: Английский

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Bismuth-Catalyzed Electrochemical Carbon Dioxide Reduction to Formic Acid: Material Innovation and Reactor Design

Accounts of Materials Research, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

Language: Английский

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Effect of Alkali and Alkaline Earth Metal Cations on the Hcooh Selectivity of the Co2 Electrochemical Reduction Reaction on Bi Electrodes in Acidic Media

Published: Jan. 1, 2025

Language: Английский

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Advancing SnO₂-Based Water Dissociation Catalysis in Bipolar-Membrane Water Electrolyzers

ACS Energy Letters, Journal Year: 2025, Volume and Issue: unknown, P. 1633 - 1641

Published: March 12, 2025

Language: Английский

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