Tuning the Activity and Selectivity of Cupt/C Catalysts for the Electrochemical Co2 Reduction

Published: Jan. 1, 2025

Copper-based bimetallic catalysts have attracted particular attention for CO2 electrochemical conversion due to the ability of this metal catalytically reduce hydrocarbons and alcohols. Herein, a set Pt-surface enriched CuPt nanoparticles supported on carbon with different Cu:Pt atomic ratios are successfully synthesised by galvanostatic displacement. The progressive incorporation platinum Cu/C significantly impacts electro-reduction performance in 0.1 M KHCO3 solution. results revealed that 99:1 95:5 enhance formate production at mild potentials (-0.6 V vs. RHE) higher proton availability near active sites than monometallic Cu/C. Significant *CO coverage limited lower or larger overpotentials. These findings demonstrate Pt enrichment surface Cu-based can effectively alter reduction mechanism, which guide design new selective production.

Language: Английский

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Enhanced Electrochemical CO₂ Reduction Using Nonthermal Plasma: Insights into Pd Catalyst Reactivation and Precise Control of H₂O₂ for Improved CO₂ Reduction Reaction Activity

Advanced Energy and Sustainability Research, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

This study investigates the electrochemical reduction of CO 2 on Pd/C with in situ‐generated H O through low‐temperature nonthermal plasma. Catalyst deactivation, a common challenge conversion, is addressed by leveraging oxidizing environment created . Experimental studies using linear sweep voltammetry and cyclic demonstrate significantly improved activity during plasma discharge, correlated an enlarged hydrogen desorption peak. Multicomponent physics‐based computational simulation highlights role , long‐lived species, enhancing reduction. Formic acid identified as major liquid product, validated nuclear magnetic resonance. The presence prevents poisoning Pd surfaces, electroreduction alters sorption, potentially creating active PdH x phase for effective demonstrates precise control concentration plasma, offering insights into catalyst reactivation activity. These findings contribute to understanding mechanisms provide basis optimizing catalytic processes

Language: Английский

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Electrochemical CO₂ Reduction on SnO: Insights into C₁ Product Dynamic Distribution and Reaction Mechanisms

ACS Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 3173 - 3183

Published: Feb. 6, 2025

The precise synthesis of desirable products from the electrochemical CO2 reduction reaction (CO2RR) remains challenging, primarily due to unclear structure–activity relationships under in situ conditions. Recognized by their cost-effectiveness and nontoxic nature, Sn-based materials are extensively utilized CO2RR produce valuable chemicals. Notably, our large-scale data mining experimental literature reveals a significant trend: SnO2-based electrocatalysts generate HCOOH, while SnO-based counterparts demonstrate ability both HCOOH CO comparable quantities. Furthermore, findings indicate that SnO underexplored terms its surface speciation for compared materials. Addressing these issues is crucial field electrocatalysis, as understanding them will not only clarify why uniquely influences distribution C1 but also provide insights into how precisely control electrocatalytic processes targeted product synthesis. Herein, we employed constant-potential method combined with coverage reconstruction analyses simulate energetics intermediates elucidate dynamic on resting typical Our analysis effectively identifies active involved CO2RR. comparative simulations between pristine reconstructed surfaces reveal electrochemistry-induced oxygen vacancies direct distribution. By addressing critical issues, aim advance electrocatalysis contribute chemical production CO2, stimulating future exploration conditions other systems.

Language: Английский

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Density Functional Theory Simulations of Skaergaardite (CuPd) with a Self-Consistent Hubbard U-Correction

Chemistry, Journal Year: 2025, Volume and Issue: 7(2), P. 56 - 56

Published: April 2, 2025

The electronic and phonon bands of Skaergaardite are investigated using density functional theory (DFT) as implemented in Quantum ESPRESSO. is a copper palladium mineral (CuPd) found the Skaergaard intrusion with CsCl-type (B2) structure. Due to its porous structure, it presents large surface area available for interactions, which makes promising catalyst. PBE-GGA Hubbard-like localized term (DFT+U) combined ultrasoft norm-conserving pseudopotentials, conventional approach dense Monkhorst–Pack grid k-points 12 × applied. valence mainly constituted by 3d orbitals Cu 4d Pd pseudo-gap can be recognized. With respect DFT, DFT+U causes general downward shift band. acoustic optical branches separated few cm−1 gap at about 150 show state curve typical ordered materials. These results highlight reliability studying bimetallic systems scarce experimental benchmarks, offering insights into behavior potential applications material science such reduction reactions hydrogen storage.

Language: Английский

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Bi Dendrites Succeed Under Challenging Flue Gas Conditions for CO₂RR

Advanced Sustainable Systems, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

Abstract The electrochemical reduction of carbon dioxide (ERC) from flue gas is a promising solution to mitigate CO 2 emissions and importantly has the ability for direct industrial application. However, components such as N , O SO x NO H in can hinder ERC efficiency, affecting catalyst stability selectivity. This study systematically investigates effect these on metallic Bi dendrite catalyst. shows remarkable (over 6 days are observed with constant current generation) surpassing other monometallic catalysts. active state been demonstrated o perando XANES (X‐ray Absorption Near Edge Structure) analysis which confirmed bismuth notably, performance remains unaffected despite presence . research aims fill critical gap, demonstrating how influence activity pave way future advancements optimization.

Language: Английский

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Tuning the activity and selectivity of CuPt/C catalysts for the electrochemical CO2 reduction

Journal of CO2 Utilization, Journal Year: 2025, Volume and Issue: 95, P. 103084 - 103084

Published: April 17, 2025

Language: Английский

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Palladium (II) pyridylidene sulfonamides (PYSAs) for electrocatalytic reduction of CO2

Journal of Molecular Structure, Journal Year: 2024, Volume and Issue: 1322, P. 140582 - 140582

Published: Nov. 13, 2024

Language: Английский

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