Cu-Zn-based alloy/oxide interfaces for enhanced electroreduction of CO2 to C2+ products

Journal of Energy Chemistry, Journal Year: 2023, Volume and Issue: 83, P. 90 - 97

Published: May 11, 2023

Language: Английский

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Stability Issues in Electrochemical CO₂ Reduction: Recent Advances in Fundamental Understanding and Design Strategies

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(51)

Published: Aug. 11, 2023

Electrochemical CO2 reduction reaction (CO2 RR) offers a promising approach to close the anthropogenic carbon cycle and store intermittent renewable energy in fuels or chemicals. On path commercializing this technology, achieving long-term operation stability is central requirement but still confronts challenges. This motivates organize present review systematically discuss issue of RR. starts from fundamental understanding on destabilization mechanisms RR, with focus degradation electrocatalyst change microenvironment during continuous electrolysis. Subsequently, recent efforts catalyst design stabilize active sites are summarized, where increasing atomic binding strength resist surface reconstruction highlighted. Next, optimization electrolysis system enhance by maintaining especially mitigating flooding carbonate problems demonstrated. The manipulation conditions also enables prolong RR lifespan through recovering catalytically mass transport process. finally ends up indicating challenges future opportunities.

Language: Английский

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Converting CO₂ into Value‐Added Products by Cu₂O‐Based Catalysts: From Photocatalysis, Electrocatalysis to Photoelectrocatalysis

Small, Journal Year: 2023, Volume and Issue: 19(19)

Published: Feb. 11, 2023

Abstract Converting CO 2 into value‐added products by photocatalysis, electrocatalysis, and photoelectrocatalysis is a promising method to alleviate the global environmental problems energy crisis. Among semiconductor materials applied in catalytic reduction, Cu O has advantages of abundant reserves, low price friendliness. Moreover, unique adsorption activation properties for , which conducive generation C 2+ through CC coupling. This review introduces basic principles reduction summarizes pathways 1 products. The factors affecting performance are further discussed from perspective reaction environment, medium, novel reactor design. Then, O‐based catalysts summarized several optimization strategies enhance their stability redox capacity discussed. Subsequently, application photocatalytic, electrocatalytic, photoelectrocatalytic described. Finally, opportunities, challenges research directions field presented, guidance its wide fields provided.

Language: Английский

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Boosting CO₂ Electroreduction to C₂H₄ via Unconventional Hybridization: High-Order Ce⁴⁺ 4f and O 2p Interaction in Ce-Cu₂O for Stabilizing Cu⁺

ACS Nano, Journal Year: 2023, Volume and Issue: 17(14), P. 13974 - 13984

Published: July 6, 2023

Efficient conversion of carbon dioxide (CO2) into value-added materials and feedstocks, powered by renewable electricity, presents a promising strategy to reduce greenhouse gas emissions close the anthropogenic loop. Recently, there has been intense interest in Cu2O-based catalysts for CO2 reduction reaction (CO2RR), owing their capabilities enhancing C–C coupling. However, electrochemical instability Cu+ Cu2O leads its inevitable Cu0, resulting poor selectivity C2+ products. Herein, we propose an unconventional feasible stabilizing through construction Ce4+ 4f–O 2p–Cu+ 3d network structure Ce-Cu2O. Experimental results theoretical calculations confirm that orbital hybridization near Ef based on high-order 4f 2p can more effectively inhibit leaching lattice oxygen, thereby Ce-Cu2O, compared with traditional d–p hybridization. Compared pure Cu2O, Ce-Cu2O catalyst increased ratio C2H4/CO 1.69-fold during CO2RR at −1.3 V. Furthermore, situ ex spectroscopic techniques were utilized track oxidation valency copper under conditions time resolution, identifying well-maintained species catalyst. This work not only avenue design involving but also provides deep insights metal-oxidation-state-dependent catalysts.

Language: Английский

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SiO₂ assisted Cu⁰–Cu⁺–NH₂ composite interfaces for efficient CO₂ electroreduction to C₂₊ products

Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 12(2), P. 1218 - 1232

Published: Dec. 13, 2023

SiO 2 assisted abundant Cu 0 –Cu + –NH composite interfaces enhance the adsorption and activation of CO H O, strengthen intermediates, promote C–C coupling to produce C 2+ products.

Language: Английский

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Nanograin-Boundary-Abundant Cu₂O-Cu Nanocubes with High C₂₊ Selectivity and Good Stability during Electrochemical CO₂ Reduction at a Current Density of 500 mA/cm²

ACS Nano, Journal Year: 2023, Volume and Issue: 17(13), P. 12884 - 12894

Published: June 20, 2023

Surface and interface engineering, especially the creation of abundant Cu0/Cu+ interfaces nanograin boundaries, is known to facilitate C2+ production during electrochemical CO2 reductions over copper-based catalysts. However, precisely controlling favorable boundaries with surface structures (e.g., Cu(100) facets Cu[n(100)×(110)] step sites) simultaneously stabilizing challenging, since Cu+ species are highly susceptible be reduced into bulk metallic Cu at high current densities. Thus, an in-depth understanding structure evolution Cu-based catalysts under realistic CO2RR conditions imperative, including formation stabilization interfaces. Herein we demonstrate that well-controlled thermal reduction Cu2O nanocubes a CO atmosphere yields remarkably stable Cu2O-Cu nanocube hybrid catalyst (Cu2O(CO)) possessing density interfaces, facets, sites. The Cu2O(CO) electrocatalyst delivered Faradaic efficiency 77.4% (56.6% for ethylene) industrial 500 mA/cm2. Spectroscopic characterizations morphological studies, together in situ time-resolved attenuated total reflection-surface enhanced infrared absorption spectroscopy (ATR-SEIRAS) established morphology interfacial sites as-prepared were preserved polarization densities due nanograin-boundary-abundant structure. Furthermore, on acted increase *CO adsorption density, thereby increasing opportunity C-C coupling reactions, leading selectivity.

Language: Английский

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Optimizing Electrocatalytic Nitrogen Reduction via Interfacial Electric Field Modulation: Elevating d‐Band Center in WS₂‐WO₃ for Enhanced Intermediate Adsorption

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(29)

Published: May 25, 2023

Electrocatalytic nitrogen reduction reaction (ENRR) has emerged as a promising approach to synthesizing green ammonia under ambient conditions. Tungsten (W) is one of the most effective ENRR catalysts. In this reaction, protonation intermediates rate-determining step (RDS). Enhancing adsorption crucial increase intermediates, which can lead improved catalytic performance. Herein, we constructed strong interfacial electric field in WS2 -WO3 elevate d-band center W, thereby strengthening intermediates. Experimental results demonstrated that led significantly Specifically, exhibited high NH3 yield 62.38 μg h-1 mgcat-1 and promoted faraday efficiency (FE) 24.24 %. Furthermore, situ characterizations theoretical calculations showed upshifted W towards Fermi level, leading enhanced -NH2 -NH on catalyst surface. This resulted rate RDS. Overall, our study offers new insights into relationship between provides strategy enhance during process.

Language: Английский

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Surface engineering for stable electrocatalysis

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(5), P. 2693 - 2737

Published: Jan. 1, 2024

Unprecedented insights into electrochemical surface dynamics from operando studies inspire electronic and topographical strategies, paving the way for sustained electrocatalytic performance across HER, OER, ORR, CO 2 RR applications.

Language: Английский

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Renewable energy driven electroreduction nitrate to ammonia and in-situ ammonia recovery via a flow-through coupled device

Water Research, Journal Year: 2023, Volume and Issue: 242, P. 120256 - 120256

Published: June 20, 2023

Language: Английский

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Engineering Cu(I)/Cu(0) interfaces for efficient ethanol production from CO2 electroreduction

Chem, Journal Year: 2023, Volume and Issue: 10(1), P. 211 - 233

Published: Sept. 21, 2023

Language: Английский

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