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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Modulating the electronic structure of Ni(OH)₂ by coupling with low-content Pt for boosting the urea oxidation reaction enables significantly promoted energy-saving hydrogen production

Energy & Environmental Science, Год журнала: 2024, Номер 17(5), С. 1984 - 1996

Опубликована: Янв. 1, 2024

A urea-assisted water splitting electrolyzer based on Pt nanoparticle-anchored Ni(OH) 2 @Ni-CNF catalyst and Pt@Ni-CNF is constructed for effectively reducing the energy consumption of H production.

Язык: Английский

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Boosting the Electrochemical 5‐Hydroxymethylfurfural Oxidation by Balancing the Competitive Adsorption of Organic and OH⁻ over Controllable Reconstructed Ni₃S₂/NiO_x

Advanced Materials, Год журнала: 2023, Номер 35(45)

Опубликована: Июль 20, 2023

The electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) is a promising method for the efficient production biomass-derived high-value-added chemicals. However, its practical application limited by: 1) low activity and selectivity caused by competitive adsorption HMF OH- 2) operational stability uncontrollable reconstruction catalyst. To overcome these limitations, series Ni3 S2 /NiOx -n catalysts with controllable compositions well-defined structures are synthesized using novel in situ controlled surface strategy. behavior can be continuously adjusted varying ratio NiOx to on surface, as indicated characterizations, contact angle analysis, theoretical simulations. Owing balanced , optimized -15 catalyst exhibited remarkable performance, current density reaching 366 mA cm-2 at 1.5 VRHE Faradaic efficiency product, 2,5-furanedicarboxylic acid, 98%. Moreover, exhibits excellent durability, structure remaining stable over 100 h operation. This study provides new route design construction value-added biomass conversion offers insights into enhancing catalytic performance balancing adsorption.

Язык: Английский

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General Formation of Interfacial Assembled Hierarchical Micro‐Nano Arrays for Biomass Upgrading‐Coupled Hydrogen Production

Advanced Functional Materials, Год журнала: 2023, Номер 34(6)

Опубликована: Ноя. 7, 2023

Abstract Construction of efficient catalysts to couple biomass upgrading with hydrogen production is significant for improving energy efficiency, which remains a challenge. Herein, general method manufacturing 3D hierarchical micro‐nano arrays consisting template framework and nanoparticle‐decorated nanosheets reported. This strategy provides an opportunity controllably tailor the interfacial assembly on precursor materials. The obtained Co@NiMoO‐Ni/NF exhibits enhanced electrocatalytic performance oxidation production. It only needs 1.21 V achieve 10 mA cm −2 5‐hydroxymethylfurfural electrooxidation reaction (HMFOR) assisted H 2 evolution (HER). good catalytic ascribed intense interaction between (Co) (NiMoO‐Ni), tunes electron structure catalyst optimize adsorption behavior HMFOR/HER intermediates promote bonds breakage key in process. work thus designing ideal upgrading‐coupled

Язык: Английский

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Proton transfer mediator for boosting the current density of biomass electrooxidation to the ampere level

Energy & Environmental Science, Год журнала: 2024, Номер 17(4), С. 1603 - 1611

Опубликована: Янв. 1, 2024

Phosphate can be employed as a hydrogen transfer mediator to accelerate the PCET process of HMF dehydrogenation, and Ru, high valence metal, reduce band gap improve charge efficiency.

Язык: Английский

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Pulsed laser interference patterning of transition‐metal carbides for stable alkaline water electrolysis kinetics

Carbon Energy, Год журнала: 2024, Номер 6(5)

Опубликована: Янв. 5, 2024

Abstract We investigated the role of metal atomization and solvent decomposition into reductive species carbon clusters in phase formation transition‐metal carbides (TMCs; namely, Co 3 C, Fe TiC, MoC) by pulsed laser ablation Co, Fe, Ti, Mo metals acetone. The interaction between s – p ‐orbitals d‐orbitals causes a redistribution valence structure through charge transfer, leading to surface defects as observed X‐ray photoelectron spectroscopy. These influence evolved TMCs, making them effective for hydrogen oxygen evolution reactions (HER OER) an alkaline medium. C with more affinity promoted CoO(OH) intermediates, electrochemical oxidation O 4 was captured via situ/operando Raman probes, increasing number active sites OER activity. MoC d‐vacancies exhibits strong binding, promoting HER kinetics, whereas TiC defect states trap carriers may hinder both activities. results show that assembled membrane‐less electrolyzer C∥Co MoC∥MoC electrodes requires ~2.01 1.99 V, respectively, deliver 10 mA cm − 2 excellent structural stability. In addition, ascertained synthesis mechanism unit‐cell packing relations will open up sustainable pathways obtaining highly stable electrocatalysts electrolyzers.

Язык: Английский

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Construction of Ag─Co(OH)₂ Tandem Heterogeneous Electrocatalyst Induced Aldehyde Oxidation and the Co‐Activation of Reactants for Biomass Effective and Multi‐Selective Upgrading

Advanced Materials, Год журнала: 2024, Номер 36(26)

Опубликована: Фев. 8, 2024

Abstract The electrocatalytic oxidation of 5‐hydroxymethylfurfural (HMF) provides a feasible way for utilization biomass resources. However, how to regulate the selective synthesis multiple value‐added products is still great challenge. cobalt‐based compound promising catalyst due its direct and indirect properties, but weak adsorption capacity restricts further development. Herein, by constructing Ag─Co(OH) 2 heterogeneous catalyst, efficient 5‐hydroxymethyl‐2‐furanoic acid (HMFCA) 2,5‐furan dicarboxylic (FDCA) at different potential ranges are realized. Based on various physical characterizations, electrochemical measurements, density functional theory calculations, it proved that addition Ag can effectively promote aldehyde group carboxyl group, then generate HMFCA low potential. Moreover, introduction activate compounds, thus strengthening organic molecules OH − species, promoting formation FDCA. This work achieves two chemicals one tandem deeply analyzes enhancement mechanism which powerful guidance development catalysts.

Язык: Английский

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CuO/Co₃O₄ Bifunctional Catalysts for Electrocatalytic 5‐Hydroxymethylfurfural Oxidation Coupled Cathodic Ammonia Production

Energy & environment materials, Год журнала: 2024, Номер 7(5)

Опубликована: Апрель 20, 2024

The electrochemical coupling of biomass oxidation and nitrogen conversion presents a potential strategy for high value‐added chemicals cycling. Herein, in this work, CuO/Co 3 O 4 with heterogeneous interface is successfully constructed as bifunctional catalyst the electrooxidation 5‐hydroxymethylfurfural to 2,5‐furandicarboxylic acid electroreduction nitrate ammonia (NH ). open‐circuit spontaneous experiment shows that more molecules are adsorbed Helmholtz layer composite, which certifies heterostructure conducive kinetic adsorption 5‐hydroxymethylfurfural. In situ impedance spectroscopy further has faster reaction kinetics lower oxygen evolution electrocatalytic oxidation. Moreover, also good reduction effect on . ex‐situ Raman under potential, metal oxide reduced, generated Cu 2 can be used new active site promote NH synthesis. This work provides valuable guidance synthesis by coupled while efficiently producing

Язык: Английский

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On the Activity and Selectivity of 5-Hydroxymethylfurfural Electrocatalytic Oxidation over Cation-Defective Nickel Hydroxides

ACS Catalysis, Год журнала: 2024, Номер 14(12), С. 9565 - 9574

Опубликована: Июнь 10, 2024

Язык: Английский

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High-valence metal sites induced by heterostructure engineering for promoting 5-hydroxymethylfurfural electrooxidation and hydrogen generation

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 659, С. 621 - 628

Опубликована: Янв. 6, 2024

Язык: Английский

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