A perspective on mechanism of high-current–density electrocatalytic CO2 reduction

MRS Energy & Sustainability, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 6, 2025

Language: Английский

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A Pulsed Tandem Electrocatalysis Strategy for CO₂ Reduction

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: April 18, 2025

Electroreduction of CO2 to value-added C2 products remains hindered by sluggish C-C coupling kinetics and competing side reactions. Inspired the tandem catalytic mechanisms multienzyme systems, we designed a dual-site single-atom nanozyme (DSAN) comprising FeN4 FeO4 sites (FeN4-FeO4). Density functional theory (DFT) calculations under constant potential reveal that site functions as CO generator, while facilitates migration, coupling, subsequent product formation. To further optimize efficiency, introduced pulsed electrocatalysis strategy alternating between zero -0.7 V. This approach dynamically modulates active-site functions: at -0.70 V, adsorption *CH3CH2OH formation are facilitated, 0 migration enhanced due spin-state transitions during switching. Additionally, suppresses excessive hydrogenation key intermediates, thereby improving CH3CH2OH selectivity. These findings highlight synergistic integrating catalysis control, offering novel effective for CO2-to-C2 conversion using SAN catalysts.

Language: Английский

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Reactant Enrichment for Aqueous Electrocatalysis

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 2, 2025

Abstract Electrocatalysis is fundamental to modern energy conversion, driving essential processes like water splitting, CO 2 reduction, nitrogen fixation, and biomass transformation. These reactions are pivotal for advancing sustainable solutions, enabling clean hydrogen production, efficient carbon recycling, valueadded chemical synthesis. However, most studies currently struggle achieve the industrially‐relevant current densities (>300 mA cm −2 ), alongside challenges in maintaining high product selectivity. Reactant enrichment strategies, which enhance local concentration of reactants at active sites, have emerged as a powerful solution these challenges. By optimizing reactant adsorption, strategies significantly reduce overpotentials while improving density This review highlights recent advancements electrooxidation (e.g., OER, electrocatalytic organic oxidation), well their application electroreduction /NO 3 − reduction). The integration multiple techniques, advanced operando methods, offers promising path toward achieving industrially relevant efficiencies selectivity, paving way next generation conversion technologies.

Language: Английский

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Carbon dioxide electrolysis systems for high carbon efficiency

Energy Conversion and Management, Journal Year: 2024, Volume and Issue: 326, P. 119443 - 119443

Published: Dec. 31, 2024

Language: Английский

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