Addressing the Carbonate Issue: Electrocatalysts for Acidic CO₂ Reduction Reaction

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Май 9, 2024

Abstract Electrochemical CO 2 reduction reaction (CO RR) powered by renewable energy provides a promising route to conversion and utilization. However, the widely used neutral/alkaline electrolyte consumes large amount of produce (bi)carbonate byproducts, leading significant challenges at device level, thereby impeding further deployment this reaction. Conducting RR in acidic electrolytes offers solution address “carbonate issue”; however, it presents inherent difficulties due competitive hydrogen evolution reaction, necessitating concerted efforts toward advanced catalyst electrode designs achieve high selectivity activity. This review encompasses recent developments RR, from mechanism elucidation design engineering. begins discussing mechanistic understanding pathway, laying foundation for RR. Subsequently, an in‐depth analysis advancements catalysts is provided, highlighting heterogeneous catalysts, surface immobilized molecular enhancement. Furthermore, progress made device‐level applications summarized, aiming develop high‐performance systems. Finally, existing future directions are outlined, emphasizing need improved selectivity, activity, stability, scalability.

Язык: Английский

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Open circuit potential decay transients quantify interfacial pH swings during high current density hydrogen electrocatalysis

Joule, Год журнала: 2024, Номер 8(3), С. 728 - 745

Опубликована: Янв. 29, 2024

Язык: Английский

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Hydrophobized electrospun nanofibers of hierarchical porosity as the integral gas diffusion electrode for full-pH CO₂ electroreduction in membrane electrode assemblies

Energy & Environmental Science, Год журнала: 2023, Номер 16(10), С. 4423 - 4431

Опубликована: Янв. 1, 2023

Hydrophobized nanofibers of hierarchical porosity as the integral gas diffusion electrode are demonstrated. The GDE showcases stable operation for >273 hours in neutral MEA and a single-pass CO 2 conversion 78% acidic MEA.

Язык: Английский

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Advanced Catalyst Design and Reactor Configuration Upgrade in Electrochemical Carbon Dioxide Conversion

Advanced Materials, Год журнала: 2023, Номер 35(52)

Опубликована: Авг. 20, 2023

Abstract Electrochemical carbon dioxide reduction reaction (CO 2 RR) driven by renewable energy shows great promise in mitigating and potentially reversing the devastating effects of anthropogenic climate change environmental degradation. The simultaneous synthesis energy‐dense chemicals can meet global demand while decoupling emissions from economic growth. However, development CO RR technology faces challenges catalyst discovery device optimization that hinder their industrial implementation. In this contribution, a comprehensive overview current state research is provided, starting with background motivation for technology, followed fundamentals evaluated metrics. Then underlying design principles electrocatalysts are discussed, emphasizing structure–performance correlations advanced electrochemical assembly cells increase selectivity throughput. Finally, review looks to future identifies opportunities innovation mechanism discovery, material screening strategies, assemblies move toward carbon‐neutral society.

Язык: Английский

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Strategies for efficient CO2 electroreduction in acidic conditions

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Год журнала: 2023, Номер 52, С. 14 - 31

Опубликована: Сен. 1, 2023

CO2 electroreduction is a promising technique to convert renewable electricity and high-value fuels chemicals. Selectivity, energy efficiency, carbon efficiency sustainability are the criteria for techniques suitable industrial application. With alkaline neutral electrolytes, carbonate formation from leads low efficiency. High consumption regenerate electrolyte high resistance of cause Recently, reduction with acidic becomes hot topic due its potential increase Improving selectivity towards challenging in condition. Diverse approaches were proposed suppress H+ promote reduction. However, fundamental issues about cation effect local pH on condition still under debate. Moreover, bicarbonate precipitation gas diffusion electrode limits electrolyte. This review tries rationalize reported strategies improve mass transport reactions. Different approaches, including adding alkali cations, surface decoration, nanostructuring, electronic structure modulation, designed based these two aspects. also introduces recent progress metal cation-free strategy deemed sustainability.

Язык: Английский

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Acidic conditions for efficient carbon dioxide electroreduction in flow and MEA cells

Chem Catalysis, Год журнала: 2023, Номер 3(8), С. 100670 - 100670

Опубликована: Июнь 21, 2023

Язык: Английский

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Design principles for selective and economical CO2 electrolysis in acids

Applied Catalysis B Environment and Energy, Год журнала: 2023, Номер 339, С. 123160 - 123160

Опубликована: Авг. 10, 2023

Язык: Английский

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Self‐Accelerating Effect in a Covalent–Organic Framework with Imidazole Groups Boosts Electroreduction of CO₂ to CO

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(42)

Опубликована: Сен. 1, 2023

Solvent effect plays an important role in catalytic reaction, but there is little research and attention on it electrochemical CO2 reduction reaction (eCO2 RR). Herein, we report a stable covalent-organic framework (denoted as PcNi-im) with imidazole groups new electrocatalyst for eCO2 RR to CO. Interestingly, compared neutral conditions, PcNi-im not only showed high Faraday efficiency of CO product (≈100 %) under acidic conditions (pH ≈ 1), also the partial current density was increased from 258 320 mA cm-2 . No obvious degradation observed over 10 hours continuous operation at 250 The mechanism study shows that group can be protonated form cation media, hence reducing surface work function charge active metal center. As result, poisoning weakened key intermediate *COOH stabilized, thus accelerating rate.

Язык: Английский

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Advances and challenges in membrane electrode assembly electrolyzers for CO₂ reduction

Journal of Materials Chemistry A, Год журнала: 2023, Номер 11(40), С. 21498 - 21515

Опубликована: Янв. 1, 2023

This review emphasizes the fundamentals of MEA construction, different technical routes, and remaining challenges opportunities for large-scale electrochemical CO 2 reduction applications.

Язык: Английский

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Ampere-level CO2 electroreduction with single-pass conversion exceeding 85% in acid over silver penetration electrodes

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Июль 19, 2024

Abstract Synthesis of valuable chemicals from CO 2 electroreduction in acidic media is highly desirable to overcome carbonation. However, suppressing the hydrogen evolution reaction such proton-rich environments remains a considerable challenge. The current study demonstrates use hollow fiber silver penetration electrode with hierarchical micro/nanostructures enable reduction strong acids via balanced coordination and K + /H supplies. Correspondingly, faradaic efficiency 95% achieved at partial density as high 4.3 A/cm pH = 1 solution H SO 4 KCl, sustaining 200 h continuous electrolysis over 85% single-pass conversion . experimental results functional theory calculations suggest that controllable feeding induced by configuration primarily coordinate balance on Ag active sites acids, favoring activation key intermediate *COOH formation, resulting enhanced formation.

Язык: Английский

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