Advances in electrolyzer design and development for electrochemical CO₂ reduction

EcoMat, Год журнала: 2023, Номер 5(7)

Опубликована: Апрель 27, 2023

Abstract In view of global energy transition and environmental issues, electrochemical conversion carbon dioxide (CO 2 ) to high value‐added chemicals by using clean renewable electricity, as an advanced capture, utilization storage (CCUS) technology, demonstrates a promising approach reach the neutrality with additional economic benefits well. Over past decade, various new valid catalysts in CO reduction (ECO2R) have been designed intensively investigated. Unfortunately, constructing appropriate ECO2R electrolyzer rate long‐term stability unleash full potential electrocatalysts remains recognized challenge, especially it has not yet attracted attention. This review summarizes progress reactor their corresponding structure characteristics/ performance. Besides, current challenges bottlenecks CO2RR are discussed. We aim introduce advances detail offer enlightenment for large‐scale industrial application ECO2R. image

Язык: Английский

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Challenges in unconventional catalysis

Catalysis Today, Год журнала: 2023, Номер 420, С. 114180 - 114180

Опубликована: Май 9, 2023

Catalysis science and technology increased efforts recently to progress beyond conventional "thermal" catalysis face the challenges of net-zero emissions electrification production. Nevertheless, a better gaps opportunities analysis is necessary. This review analyses four emerging areas unconventional or less-conventional which share common aspect using directly renewable energy sources: (i) plasma catalysis, (ii) for flow chemistry process intensification, (iii) application electromagnetic (EM) fields modulate catalytic activity (iv) nanoscale generation at catalyst interface strong local EM by plasmonic effect. Plasma has demonstrated synergistic effects, where outcome higher than sum both processes alone. Still, underlying mechanisms are complex, synergy not always obtained. There crucial need understanding design catalysts tailored environment, reactors with optimal transport species surface, tune conditions so they work in catalyst. Microfluidic (flow chemistry) another sector leading intensification syntheses, particularly organic chemistry. New must be designed exploit full novel possibilities. With focus on (a) continuous-flow photocatalysis, (b) electrochemical (c) microwave (d) ultrasound activation, series examples discussed, also indications scale-up industrialisation. The third area discussed regards effect performances applying oriented spanning several orders magnitude. Under well-defined conditions, gas breakdown and, some cases, formation generates activated phase species. field-driven chemical conversion depend further structured electric/magnetic catalysts, shape field strength direction. Different effects influencing have been reported, including reduced activation energy, surface charging, hot spot generation, selective heating. last topic complementary third, focusing possibility tuning photo- electro-catalytic properties creating localised electrical possibilities carriers generated discussed. thus aims stimulate reader make new, creative address reaching carbon-neutral world.

Язык: Английский

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Solar driven CO₂reduction: from materials to devices

Journal of Materials Chemistry A, Год журнала: 2023, Номер 11(24), С. 12499 - 12520

Опубликована: Янв. 1, 2023

Solar driven CO 2 reduction is a promising technology for achieving carbon neutrality. The optimized photo-absorber, catalyst and device their synergistic operation are essential realizing highly efficient solar system.

Язык: Английский

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Linking Electric Double Layer Formation to Electrocatalytic Activity

ACS Catalysis, Год журнала: 2023, Номер 13(24), С. 16222 - 16239

Опубликована: Дек. 5, 2023

Electric double layers form at electrode–electrolyte interfaces and often play defining roles in governing electrochemical reaction rates selectivity. While layer formation has remained an active area of research for more than a century, most frameworks used to predict electric properties, such as local ion concentrations, potential gradients, reactant chemical potentials, remain rooted classical Gouy–Chapman–Stern theory, which neglects ion–ion interactions assumes nonreactive interfaces. Yet, recent findings from the surface forces electrocatalysis communities have highlighted how emergence fundamentally alters mechanisms interface properties. Notably, studies with ionic liquids show that correlations clustering can substantially alter selectivity, especially concentrated electrolytes. Further, emerging suggest structures dynamics significantly change potentials where electrocatalytic reactions occur. Here, we provide our perspective on impact properties contribute modulating systems, under conditions high concentrations large applied cause deviations electrolyte theory. We also summarize growing questions opportunities further explore drastically conclude these open door using study achieve conversion by engineering

Язык: Английский

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Homogeneous Vacancies-Enhanced Orbital Hybridization for Selective and Efficient CO₂-to-CO Electrocatalysis

Nano Letters, Год журнала: 2023, Номер 23(20), С. 9227 - 9234

Опубликована: Окт. 4, 2023

Crafting vacancies offers an efficient route to upgrade the selectivity and productivity of nanomaterials for CO2 electroreduction. However, defective nanoelectrocatalysts bear catalytically active mostly on their surface, with rest interior atoms adiaphorous CO2-to-product conversion. Herein, taking nanosilver as a prototype, we arouse catalytic ability internal by creating homogeneous realized via electrochemical reconstruction silver halides. The vacancies-rich nanosilver, compared surface vacancies-dominated counterpart, features more positive d-band center trigger intensified hybridization Ag_d orbital C_P *COOH intermediate, leading accelerated CO2-to-CO transformation. These structural electronic merits allow large-area (9 cm-2) electrode generate nearly pure CO CO/H2 Faradaic efficiency ratio 6932 at applied current 7.5 A. findings highlight potential designing new-type defects in realizing industrialization electrocatalytic reduction.

Язык: Английский

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Nanotip-Induced Electric Field for Hydrogen Catalysis

Nano Letters, Год журнала: 2023, Номер 23(24), С. 11827 - 11834

Опубликована: Дек. 11, 2023

Local electric field induced by the lightning-rod effect attracts great attention for regulating local microenvironment and electronic properties of active sites. Nevertheless, electric-field-assisted applications are mainly limited to metals with strong surface plasmonic resonance (e.g., Au, Ag, Cu). Herein, we fabricate RuCu snow-like nanosheets (SNSs) high-curvature nanotips enhancing hydrogen oxidation reaction (HOR) evolution (HER). Theoretical simulations show that SNSs can induce a around sharp nanotips, which favors accumulation OH– HOR H+ HER. Cu incorporation modulate binding strength OH* H*, leading significantly enhanced HER performance. Impressively, mass activity alkaline is 31.3 times higher than nanocrystals without tips. Besides, required overpotential reaching 10 mA cm–2 during over 14.0 mV.

Язык: Английский

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The Secret of Nanoarrays toward Efficient Electrochemical Water Splitting: A Vision of Self‐Dynamic Electrolyte

Advanced Materials, Год журнала: 2023, Номер 35(48)

Опубликована: Окт. 12, 2023

Nanoarray electrocatalysts with unique advantage of facilitating gas bubble detachment have garnered significant interest in evolution reactions (GERs). Existing research is largely based on a static hypothesis, assuming that buoyancy the only driving force for release bubbles during GERs. However, this hypothesis overlooks effect self-dynamic electrolyte flow, which induced by mature and helps destabilize smaller, immature nearby. Herein, enhancing flow nanoarray structures examined. Phase-field simulations demonstrate field electrode arrayed surface focuses shear directly onto efficient detachment, due to could pass through voids channels bypass shielding effect. The therefore has more substantial impact than nanoscale smooth terms reducing critical size. To validate this, superaerophobic ferrous-nickel sulfide nanoarrays are fabricated employed water splitting, display improved efficiency This study contributes understanding influence GERs emphasizes it should be considered when designing evaluating electrocatalysts.

Язык: Английский

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Uncovering Photoelectronic and Photothermal Effects in Plasmon‐Mediated Electrocatalytic CO₂ Reduction

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(13)

Опубликована: Фев. 7, 2024

Plasmon-mediated electrocatalysis that rests on the ability of coupling localized surface plasmon resonance (LSPR) and electrochemical activation, emerges as an intriguing booming area. However, its development seriously suffers from entanglement between photoelectronic photothermal effects induced by decay plasmons, especially under influence applied potential. Herein, using LSPR-mediated CO

Язык: Английский

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Proton Transfer Dynamics‐Mediated CO₂ Electroreduction

ChemSusChem, Год журнала: 2023, Номер 16(12)

Опубликована: Фев. 23, 2023

Electrochemical CO2 reduction reaction (CO2 RR) is crucial to addressing environmental crises and producing chemicals. Proton activation transfer are essential in RR. To date, few research reviews have focused on this process its effect catalytic performance. Recent studies demonstrated ways improve RR by regulating proton dynamics. This Concept highlights the use of dynamics enhance for target product discusses modulation strategies operative mechanisms typical systems, including single-atom catalysts, molecular metal heterointerfaces, organic-ligand modified catalysts. Characterization methods during also discussed, providing powerful tools hydrogen-involving electrochemical study. offers new insights into mechanism guides design efficient systems.

Язык: Английский

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Atomically Local Electric Field Induced Interface Water Reorientation for Alkaline Hydrogen Evolution Reaction

Angewandte Chemie, Год журнала: 2023, Номер 135(26)

Опубликована: Март 8, 2023

Abstract The slow water dissociation process in alkaline electrolyte severely limits the kinetics of HER. orientation H 2 O is well known to affect process, but hard control because its random distribution. Herein, an atomically asymmetric local electric field was designed by IrRu dizygotic single‐atom sites (IrRu DSACs) tune adsorption configuration and orientation, thus optimizing process. intensity DSACs over 4.00×10 10 N/C. ab initio molecular dynamics simulations combined with situ Raman spectroscopy analysis on behavior show that M−H bond length (M=active site) shortened at interface due strong gradient optimized promotes interfacial water. This work provides a new way explore role single atomic hydrogen evolution reaction.

Язык: Английский

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