Bifunctional Electrocatalysts for Overall and Hybrid Water Splitting

Chemical Reviews, Год журнала: 2024, Номер 124(7), С. 3694 - 3812

Опубликована: Март 22, 2024

Electrocatalytic water splitting driven by renewable electricity has been recognized as a promising approach for green hydrogen production. Different from conventional strategies in developing electrocatalysts the two half-reactions of (e.g., and oxygen evolution reactions, HER OER) separately, there growing interest designing bifunctional electrocatalysts, which are able to catalyze both OER. In addition, considering high overpotentials required OER while limited value produced oxygen, is another rapidly exploring alternative oxidation reactions replace hybrid toward energy-efficient generation. This Review begins with an introduction on fundamental aspects splitting, followed thorough discussion various physicochemical characterization techniques that frequently employed probing active sites, emphasis reconstruction during redox electrolysis. The design, synthesis, performance diverse based noble metals, nonprecious metal-free nanocarbons, overall acidic alkaline electrolytes, thoroughly summarized compared. Next, their application also presented, wherein anodic include sacrificing agents oxidation, pollutants oxidative degradation, organics upgrading. Finally, concise statement current challenges future opportunities presented hope guiding endeavors quest sustainable

Язык: Английский

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Water electrolysis for hydrogen production: from hybrid systems to self-powered/catalyzed devices

Energy & Environmental Science, Год журнала: 2023, Номер 17(1), С. 49 - 113

Опубликована: Ноя. 7, 2023

This perspective highlights recent advancements in innovative strategies to provide valuable insights into the potential for energy-saving hydrogen production through water electrolysis.

Язык: Английский

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Interfacial engineering of transition metal dichalcogenide/carbon heterostructures for electrochemical energy applications

Chemical Society Reviews, Год журнала: 2023, Номер 52(22), С. 7802 - 7847

Опубликована: Янв. 1, 2023

This review provides a fundamental understanding of three types interfacial engineering in TMDC/C heterostructures and guidance for designing electrochemical energy applications.

Язык: Английский

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Constructing CoO/Mo₂C Heterostructures with Interfacial Electron Redistribution Induced by Work Functions for Boosting Overall Water Splitting

Small, Год журнала: 2023, Номер 19(49)

Опубликована: Авг. 23, 2023

Space charge transfer of heterostructures driven by the work-function-induced built-in field can regulate electronic structure catalysts and boost catalytic activity. Herein, an epitaxial heterojunction catalyst CoO/Mo2 C with interfacial electron redistribution induced work functions (WFs) is constructed for overall water splitting via a novel top-down strategy. Theoretical simulations experimental results unveil that WFs-induced facilitates from CoO to Mo2 through formed "Co─C─Mo" bond at interface C, achieving redistribution, further optimizing Gibbs free energy primitive reaction step then accelerating kinetics hydrogen evolution (HER). As expected, effects exhibits excellent HER activity only needing overpotential 107 mV achieve 10 mA cm-2 stability 60-h continuous catalyzing. Besides, assembled behaves outstanding performance toward (1.58 V ). This provides possibility designing materials based on arising application in other fields.

Язык: Английский

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Heteroatom-doped MXenes as electrocatalysts for hydrogen evolution reaction: A review on the recent advances, mechanisms and prospects

Chemical Engineering Journal, Год журнала: 2024, Номер 483, С. 149107 - 149107

Опубликована: Янв. 28, 2024

Язык: Английский

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Dynamic Electrodeposition on Bubbles: An Effective Strategy toward Porous Electrocatalysts for Green Hydrogen Cycling

Accounts of Chemical Research, Год журнала: 2023, Номер 56(12), С. 1421 - 1432

Опубликована: Май 25, 2023

ConspectusClosed-loop cycling of green hydrogen is a promising alternative to the current hydrocarbon economy for mitigating energy crisis and environmental pollution. It stores from renewable sources like solar, wind, hydropower into chemical bond dihydrogen (H2) via (photo)electrochemical water splitting, then stored can be released on demand through reverse reactions in H2-O2 fuel cells. The sluggish kinetics involved half-reactions evolution reaction (HER), oxygen (OER), oxidation (HOR), reduction (ORR) limit its realization. Moreover, considering local gas-liquid-solid triphase microenvironments during H2 generation utilization, rapid mass transport gas diffusion are critical as well. Accordingly, developing cost-effective active electrocatalysts featuring three-dimensional hierarchically porous structures highly desirable promote conversion efficiency. Traditionally, synthetic approaches materials include soft/hard templating, sol-gel, 3D printing, dealloying, freeze-drying, which often need tedious procedures, high temperature, expensive equipment, and/or harsh physiochemical conditions. In contrast, dynamic electrodeposition bubbles using situ formed templates conducted at ambient conditions with an electrochemical workstation. whole preparation process finished within minutes/hours, resulting employed catalytic electrodes directly, avoiding use polymeric binders Nafion consequent issues limited catalyst loading, reduced conductivity, inhibited transport.In this Account, we summarize our contributions toward advanced cycling. These electrosynthesis strategies potentiodynamic that linearly scans applied potentials, galvanostatic fixes currents, electroshock quickly switches potentials. range transition metals alloys, nitrides, sulfides, phosphides, their hybrids. We mainly focus porosity design by tuning parameters tailor behaviors bubble co-generation thus interface. Then, electrocatalytic applications HER, OER, overall splitting (OWS), biomass (to replace OER), HOR introduced, special emphasis porosity-promoted activity. Finally, remaining challenges future perspective also discussed. hope Account will encourage more efforts attractive research field various carbon dioxide/monoxide reduction, nitrate methane oxidation, chlorine evolution, others.

Язык: Английский

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Unlocking Efficient Hydrogen Production: Nucleophilic Oxidation Reactions Coupled with Water Splitting

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Июнь 10, 2024

Abstract Electrocatalytic water splitting driven by sustainable energy is a clean and promising water‐chemical fuel conversion technology for the production of high‐purity green hydrogen. However, sluggish kinetics anodic oxygen evolution reaction (OER) pose challenges large‐scale hydrogen production, limiting its efficiency safety. Recently, OER has been replaced nucleophilic oxidation (NOR) with biomass as substrate coupled (HER), which attracted great interest. Anode NOR offers faster kinetics, generates high‐value products, reduces consumption. By coupling reaction, can be enhanced while yielding products or degrading pollutants. Therefore, NOR‐coupled HER another new electrolytic strategy after significance realizing development global decarbonization. This review explores potential reactions an alternative to delves into mechanisms, guiding future research in production. It assesses different methods, analyzing pathways catalyst effects. Furthermore, it evaluates role electrolyzers industrialized discusses prospects challenges. comprehensive aims advance efficient economical

Язык: Английский

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Photoelectrocatalytic principles for meaningfully studying photocatalyst properties and photocatalysis processes: From fundamental theory to environmental applications

Journal of Energy Chemistry, Год журнала: 2023, Номер 86, С. 84 - 117

Опубликована: Июль 23, 2023

Язык: Английский

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A comprehensive review on advances in polyoxometalate based materials for electrochemical water splitting

Coordination Chemistry Reviews, Год журнала: 2024, Номер 504, С. 215644 - 215644

Опубликована: Янв. 17, 2024

Recent years have witnessed a growing global demand for green, sustainable, and reliable energy sources in response to the effects of climate change, pollution, crisis. Consequently, there has been significant focus on utilizing water, most abundant accessible chemical compound, renewable generation. Electrocatalysis pivotal role area green production, serving as fundamental component sustainable exceptionally efficient techniques. To achieve this, design preparation practical, functional groups host/guest compatible materials that are stable, reusable, noble-metal-free, possess structural diversities paramount importance electrochemical water splitting (EWS) systems. Polyoxometalates (POMs), emerged promising electrocatalysts past two decades, offering opportunities achieving aforementioned goals. POMs exhibit exceptional qualities such redox stability, multiredox capability, tunable intrinsic extrinsic properties (e.g., structure design, surface engineering, interface engineering), well desirable ionic conductivity. However, practical applications face substantial challenges, including issues like leaching, agglomeration, low stability. The confinement controlling their composition proven be an effective strategy tackling issues, garnering attention recent years. This review focuses progress advancement application POM-based materials. It provides thorough exploration diverse host/substrate materials, comprising carbon nanotubes, graphdiyne, graphene, nitrides, conductive polymers, MOFs, COFs, CTFs, LDHs, metal carbide MXenes, which categorize into tubular, layered, porous structures. synthesis strategies these examined, elucidating catalytic activities. Notably, highlights research advancements compounds mechanisms, particularly EWS overall electrolysis, tandem anodic hybrid systems, cathodic decoupled Addressing challenges presenting future perspectives, this aims assist selecting robust material partnerships integrating

Язык: Английский

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Encapsulation of ruthenium oxide nanoparticles in nitrogen-doped porous carbon polyhedral for pH-universal hydrogen evolution electrocatalysis

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 74, С. 10 - 16

Опубликована: Июнь 12, 2024

Язык: Английский

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