Rational design of local microenvironment for electrocatalytic water splitting

Inorganic Chemistry Frontiers, Год журнала: 2024, Номер 11(14), С. 4080 - 4106

Опубликована: Янв. 1, 2024

This summary describes the effects of wettability, local pH, interfacial water structure, and electrolyte composition on interface reactant compositions, key intermediate adsorption, reaction kinetics.

Язык: Английский

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The known-unknowns of anomalous underscreening in concentrated electrolytes

Chemical Physics Letters, Год журнала: 2024, Номер 843, С. 141190 - 141190

Опубликована: Март 12, 2024

Electrolytes are central to life and technology but lack complete understanding. Recent experiments with highly concentrated electrolytes have revealed electrostatic decay lengths orders of magnitude larger than those predicted by theory simulation. This phenomenon, dubbed 'anomalous underscreening' its origin is still a comprehensive Herein we provide perspective over recent developments in this field discuss phenomena that, while potentially pertinent electrolyte underscreening, yet be fully explored - i.e. the 'known-unknowns' underscreening electrolytes.

Язык: Английский

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Cation effects in hydrogen evolution and CO2-to-CO conversion: A critical perspective

The Journal of Chemical Physics, Год журнала: 2024, Номер 160(16)

Опубликована: Апрель 23, 2024

The rates of many electrocatalytic reactions can be strongly affected by the structure and dynamics electrochemical double layer, which in turn tuned concentration identity supporting electrolyte's cation. effect cations on an process depends a complex interplay between electrolyte components, electrode material surface structure, applied potential, reaction intermediates. Although cation effects remain insufficiently understood, principal mechanisms underlying cation-dependent reactivity selectivity are beginning to emerge. In this Perspective, we summarize critically examine recent advances area context hydrogen evolution (HER) CO2-to-CO conversion, among most intensively studied promising for sustainable production commodity chemicals fuels. Improving kinetics HER base enabling energetically efficient selective CO2 reduction at low pH key challenges electrocatalysis. physical insights from literature illustrate how utilized help achieve these goals steer other processes technological relevance.

Язык: Английский

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Anionic Surfactant-Tuned Interfacial Water Reactivity Promoting Electrocatalytic CO₂ Reduction

ACS Catalysis, Год журнала: 2024, Номер unknown, С. 18156 - 18166

Опубликована: Ноя. 23, 2024

The effects of the electrical double layer (EDL), which pertain to compositions and interactions among electrolyte species, significantly impact catalytic process. There is a pressing need investigate role components deepen our understanding EDL effects. In this study, we tune water activity within range anionic surfactants featuring different functional groups adjust H2 evolution CO2 reduction selectivity. We demonstrate that these are active in local reaction environment under cathodic potential. enhanced selectivity CO can be attributed robust interfacial hydrogen-bonding network reformed by surfactants. This diminishes dissociation promotes hydrogenation step reduction. Notably, incorporating improves performance, registering Faradaic efficiencies 89.7% (RSO3–, SDS), 97.5% (RSO4–, SLS), 98.4% (RPO42–, SMP), 98.9% (RCOO–, SL) at −1.2 V versus RHE, thereby outperforming blank KHCO3 (53.1%). research underscores crucial influence additives CO2RR.

Язык: Английский

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Electrocatalysis, diverse and forever young

Electrochimica Acta, Год журнала: 2024, Номер unknown, С. 145174 - 145174

Опубликована: Сен. 1, 2024

Язык: Английский

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Harnessing Electrolyte Chemistry to Advance Oxygen Reduction Catalysis for Fuel Cells and Electrosynthesis

ACS Catalysis, Год журнала: 2024, Номер 14(22), С. 16963 - 16985

Опубликована: Ноя. 2, 2024

Oxygen reduction reaction (ORR) is ubiquitous in many important energy conversion technologies, encompassing fuel cells, metal-air batteries, and H2O2 electrosynthesis. However, its inherently sluggish kinetics often leads to substantial overpotentials losses efficiency, thus prompting extensive efforts into catalyst optimization. In the past few years, growing research has underscored pivotal role of electrolyte-associated factors affecting ORR performance. this review, we focus on intricate interplay between electrolyte properties, pH, cations, anions, additives, their impacts electrocatalysis, particularly for platinum (and alloys) nonprecious metal–nitrogen–carbon catalysts. We examine how these electrolyte-mediated alterations affect electrode surface, reactive species, microenvironment, thereby modulating adsorption energetics intermediates, stability mass transport, ultimately overall process. highlight need dynamic models advanced probing technologies at electrocatalytic interfaces, advocate adopting a holistic approach that synchronizes effects electrolytes catalysts optimizing electrocatalysis. This review lays foundation refining descriptive formulations which potentially guides development enhanced cathodes practical applications.

Язык: Английский

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Molecular dynamics simulation of electric double layer effects on microscopic wettability and enhanced oil recovery in tight sandstone reservoirs

Colloids and Surfaces A Physicochemical and Engineering Aspects, Год журнала: 2025, Номер 709, С. 136143 - 136143

Опубликована: Янв. 8, 2025

Язык: Английский

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Recent progress in alkaline electrocatalytic hydrogen oxidation reaction: Mechanisms, catalysts design and perspectives

Coordination Chemistry Reviews, Год журнала: 2025, Номер 528, С. 216427 - 216427

Опубликована: Янв. 9, 2025

Язык: Английский

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Cation-controlled diffusion of chloride ions during electrochemical chlorine evolution in acidic media

Research Square (Research Square), Год журнала: 2025, Номер unknown

Опубликована: Янв. 17, 2025

Impurity ions pose a major challenge towards diversifying water usage for electrolysis. In particular, millimolar-level chloride impurities remaining in reverse osmosis filtrates significantly diminish the selectivity and longevity of electrolyzers. Here, we show that alkali metal cations can regulate diffusion coefficient ions, enabling suppression chlorine evolution during electrolysis under diffusion-limiting conditions. Evidence cation dependency is provided by positive intercepts both Levich modified Koutecký−Levich plots using rotating ring disk electrode, indicating presence an additional, cation-dependent layer suppresses diffusion. Numerical simulations based on double model quantify this effect, resulting linear correlation between barrier structural entropy hydration. These findings suggest structuring influences mass transport, which particularly important at practical current densities where impurity are diffusion-limited.

Язык: Английский

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Advanced Morphological and Material Engineering for High‐Performance Interfacial Iontronic Pressure Sensors

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 22, 2025

Abstract High‐performance flexible pressure sensors are crucial for applications such as wearable electronics, interactive systems, and healthcare technologies. Among these, iontronic have garnered particular attention due to their superior sensitivity, enabled by the giant capacitance variation of electric double layer (EDL) at ionic‐electronic interface under deformation. Key advancements, incorporating microstructures into ionic layers employing diverse materials, significantly improved sensor properties like accuracy, stability, response time. This review highlights advancements in EDL sensors, focusing on structural designs material engineering. These strategies tailored optimize key metrics detection limit, linearity, speed, hysteresis, transparency, wearability, selectivity, multifunctionality. fabrication techniques, including micropatterning externally assisted methods, reviewed, along with comparison guidelines selecting appropriate sensors. Emerging healthcare, environmental aerodynamic sensing, human–machine interaction, robotics, machine learning‐assisted intelligent sensing explored. Finally, this discusses challenges future directions advancing EDL‐based

Язык: Английский

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