Vanadium Oxide Clusters Mediated Bismuth‐Tin Alloy for Accelerated Dynamics of Electrocatalytic CO₂ Conversion

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 16, 2024

Abstract The electrocatalytic conversion of carbon dioxide (CO 2 ) to formate is significant for neutrality. How improve the reaction kinetics electrocatalysts one important challenges. An innovative electrodeposition strategy presented herein rationally synthesize vanadium oxide (VO x clusters decorated Bi‐Sn alloy (BiSn(VO )) catalyst. Theoretical and in situ spectral studies confirm simultaneously improved CO activation subsequent protonation via VO mediated water dissociation process, thereby optimizing activity selectivity formate. Remarkably, this BiSn(VO catalyst achieves high Faradic efficiency (FE) over 90% within wide potential window 800 mV excellent stability 100 h at −0.6 V versus RHE. Moreover, cathode integrated rechargeable Zn‐CO battery realizes largest power density 3.8 mW cm −2 , while assembled co‐electrolysis electrolyzer delivers a total FE 182% cell voltage 0.6 V, outperforming highest value so far. work provides promising way develop advanced electrolysis.

Language: Английский

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Interfacial Interaction‐Mediated Regulation of Metal Oxidation States for Enhanced CO₂ Reduction

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

Published: March 20, 2025

Abstract In the field of electrocatalytic CO₂ reduction, bismuth (Bi) and its compounds have garnered significant attention due to their excellent selectivity for formate production low toxicity. However, practical application is limited by sluggish kinetics high overpotentials. this study, a novel vanadium oxynitride (VON)‐ Bi hybrid material developed that enables precise control in situ Bi–oxygen (O) formation during topochemical process regulate oxidation states effectively. The unique interfacial interaction facilitates abundant Bi─O bonds metallic Bi, successfully addressing challenge maintaining intrinsic catalytic sites at core nanoparticles while simultaneously enhancing both thermodynamics border. As result, VON‐Bi catalyst effectively addresses issue associated with metal, achieving an impressive Faradaic efficiency 97.11% production. Additionally, it exhibits outstanding scalability durability flow‐cell testing 100 mA cm −2 120 h, outperforming most reported oxides derivatives. This strategy can be extended other systems such as VON‐nickle VON‐copper, highlighting versatility designing efficient catalysts through metal‐oxygen interactions.

Language: Английский

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Electrochemical reduction of CO2 to liquid products: Factors influencing production and selectivity

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 128, P. 800 - 832

Published: April 25, 2025

Language: Английский

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Quantum-dot-like Bi/Bi2O2CO3 heterostructures via in situ MOF reconstruction toward efficient CO2-to-Formate conversion over a wide potential window

Applied Surface Science, Journal Year: 2025, Volume and Issue: unknown, P. 163351 - 163351

Published: April 1, 2025

Language: Английский

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Metalloenzyme‐Inspired Cluster Fabrication within Mesoporous Channels Featuring Optimized Catalytic Microenvironments for Efficient Neutral pH H₂O₂ Electrosynthesis

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

Published: March 17, 2025

Abstract In nature, some metalloenzymes facilitate highly efficient catalytic transformations of small molecules, primarily attributed to the effective coupling between their metal cluster active sites and surrounding microenvironment. Inspired by this, a thermotropic redispersion strategy incorporate bismuth nanoclusters (Bi NCs) into mesoporous channels, mimicking metalloenzyme‐like catalysis enhance two‐electron oxygen reduction reaction (2e − ORR) for neutral pH H 2 O electrosynthesis, is developed. This model electrocatalyst exhibits exceptional 2e ORR performance with >95% selectivity across 0.2–0.6 V vs RHE in electrolyte. Notably, system produces up 7.2 wt% solution at an industrially relevant current density ≈320 mA cm −2 , 90% Faradaic efficiency over 120 h flow cell, demonstrating significant practical potential. Mechanistic insights reveal that introduction Bi NCs enhances adsorption *OOH intermediate, facilitating process. Moreover, channels carbon support create favorable microenvironment aeration local alkalinity, further boosting productivity. catalyst design mimics optimal integration site microenvironment, offering valuable rational nature‐inspired small‐molecule catalysts.

Language: Английский

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Efficient CO2 Electrocarboxylation Using Dye-Sensitized Photovoltaics

Molecules, Journal Year: 2024, Volume and Issue: 30(1), P. 40 - 40

Published: Dec. 26, 2024

This paper presents the solar-driven electrocarboxylation of 2-bromopyridine (2-BP) with CO2 into high-value-added chemicals 2-picolinic acid (2-PA) using dye-sensitized photovoltaics under simulated sunlight. Using three series-connected photovoltaic modules and an Ag electrode excellent catalytic performance, a Faraday efficiency (FE) 33.3% is obtained for 2-PA mild conditions. The experimental results show that photovoltaics-driven systems conversion heterocyclic halide to afford value-added carboxylic are feasible effective.

Language: Английский

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