Efficient Electrooxidation of 5‐Hydroxymethylfurfural Using Co‐Doped Ni₃S₂ Catalyst: Promising for H₂ Production under Industrial‐Level Current Density

Advanced Science, Год журнала: 2022, Номер 9(17)

Опубликована: Апрель 15, 2022

Abstract Replacing oxygen evolution reaction (OER) by electrooxidations of organic compounds has been considered as a promising approach to enhance the energy conversion efficiency electrolytic water splitting proces. Developing efficient electrocatalysts with low potentials and high current densities is crucial for large‐scale productions H 2 other value‐added chemicals. Herein, non‐noble metal Co‐doped Ni 3 S self‐supported on foam (NF) substrate are prepared used catalysts 5‐hydroxymethylfurfural (HMF) oxidation (HMFOR) under alkaline aqueous conditions. For HMFOR, Co 0.4 NiS@NF electode achieves an extremely onset potential 0.9 V versus reversible hydrogen electrode (RHE) records large density 497 mA cm –2 at 1.45 RHE HMFOR. During HMFOR‐assisted production, yield rates 2,5‐furandicarboxylic acid (FDCA) in 10 mL electrolyte containing × −3 M HMF 330.4 µmol h –1 1000 , respectively. The electrocatalyst displays good cycling durability toward HMFOR can be electrooxidation biomass‐derived findings present facile route based heteroatom doping fabricate high‐performance catalyses that facilitate industrial‐level production coupling conventional HER cathodic processes

Язык: Английский

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Transition metal-based electrocatalysts for overall water splitting

Chinese Chemical Letters, Год журнала: 2021, Номер 32(9), С. 2597 - 2616

Опубликована: Фев. 3, 2021

Язык: Английский

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Methanol upgrading coupled with hydrogen product at large current density promoted by strong interfacial interactions

Energy & Environmental Science, Год журнала: 2023, Номер 16(3), С. 1100 - 1110

Опубликована: Янв. 1, 2023

The ultrafast solution combustion synthesis of heterogeneous interface is developed to boost anodic organic upgrading reaction, which exhibits remarkable current density and faradaic efficiency benefiting from the strong electronic interaction.

Язык: Английский

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Metal–Organic Framework‐Derived Hollow CoS_x Nanoarray Coupled with NiFe Layered Double Hydroxides as Efficient Bifunctional Electrocatalyst for Overall Water Splitting

Small, Год журнала: 2022, Номер 18(16)

Опубликована: Март 15, 2022

Abstract For effective hydrogen production by water splitting, it is essential to develop earth‐abundant, highly efficient, and durable electrocatalysts. Herein, the authors report a bifunctional electrocatalyst composed of hollow CoS x Ni–Fe based layered double hydroxide (NiFe LDH) nanosheets for efficient overall splitting (OWS). The optimized heterostructure obtained electrodeposition NiFe LDH on metal–organic framework‐derived nanoarrays, which are supported nickel foam (H‐CoS @NiFe LDH/NF). unique structure hybrid material not only provides ample active sites, but also facilitates electrolyte penetration gas release during reactions. Additionally, strong coupling synergy between evolution reaction (HER) oxygen (OER) gives rise excellent properties. Consequently, H‐CoS LDH/NF exhibits remarkable HER OER activities with overpotentials 95 250 mV, respectively at 10 mA cm −2 in 1.0 M KOH. Even A , electrode requires small 375 mV (for HER) 418 OER), respectively. An electrolyzer demonstrates low cell voltage 1.98 V current density 300 good durability 100 h OWS application.

Язык: Английский

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Modulating Local Interfacial Bonding Environment of Heterostructures for Energy‐Saving Hydrogen Production at High Current Densities

Advanced Functional Materials, Год журнала: 2023, Номер 33(12)

Опубликована: Янв. 8, 2023

Abstract Coupling urea oxidation reaction (UOR) with hydrogen evolution (HER) is an effective energy‐saving technique for generation. However, exploring efficient bifunctional electrocatalysts under high current density still challenging. Herein, hierarchical Fe doped cobalt selenide coupled FeCo layered double hydroxide (Fe‐Co 0.85 Se/FeCo LDH) array as a self‐supported superior heterojunction electrode rationally designed both UOR and HER. The unique heterostructure facilitates electron transfer interface interactions through local interfacial Co‐Se/O‐Fe bonding environment modulation, improving kinetics intrinsic activity. As result, the heterostructured electrocatalyst exhibits ultralow potentials of −0.274 1.48 V to reach 500 mA cm −2 catalyzing HER UOR, respectively. Particularly, full electrolysis system driven by Fe‐Co LDH delivers 300 at relatively low potential 1.57 V, which 150 mV lower than conventional water electrolysis. combination in situ characterization theoretical analysis reveal that active sites adjustable electronic are induced heterojunction, facilitating decomposition stabilization intermediates UOR. This work inspires modulation optimize advanced H 2 production.

Язык: Английский

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An anionic regulation mechanism for the structural reconstruction of sulfide electrocatalysts under oxygen evolution conditions

Energy & Environmental Science, Год журнала: 2022, Номер 15(8), С. 3257 - 3264

Опубликована: Янв. 1, 2022

Hetero-anionic oxysulfides, possessing an optimized electronic structure and excellent intrinsic activity, are identified as the actual stable active site of sulfide pre-electrocatalysts for oxygen evolution.

Язык: Английский

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A Review of Transition Metal Boride, Carbide, Pnictide, and Chalcogenide Water Oxidation Electrocatalysts

Chemical Reviews, Год журнала: 2023, Номер 123(23), С. 12795 - 13208

Опубликована: Ноя. 15, 2023

Transition metal borides, carbides, pnictides, and chalcogenides (X-ides) have emerged as a class of materials for the oxygen evolution reaction (OER). Because their high earth abundance, electrical conductivity, OER performance, these electrocatalysts potential to enable practical application green energy conversion storage. Under potentials, X-ide demonstrate various degrees oxidation resistance due differences in chemical composition, crystal structure, morphology. Depending on oxidation, catalysts will fall into one three post-OER electrocatalyst categories: fully oxidized oxide/(oxy)hydroxide material, partially core@shell unoxidized material. In past ten years (from 2013 2022), over 890 peer-reviewed research papers focused electrocatalysts. Previous review provided limited conclusions omitted significance "catalytically active sites/species/phases" this review, comprehensive summary (i) experimental parameters (e.g., substrates, loading amounts, geometric overpotentials, Tafel slopes, etc.) (ii) electrochemical stability tests post-analyses publications from 2022 is provided. Both mono polyanion X-ides are discussed classified with respect material transformation during OER. Special analytical techniques employed study reconstruction also evaluated. Additionally, future challenges questions yet be answered each section. This aims provide researchers toolkit approach showcase necessary avenues investigation.

Язык: Английский

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Electrocatalytic hydrogen peroxide production in acidic media enabled by NiS₂ nanosheets

Journal of Materials Chemistry A, Год журнала: 2021, Номер 9(10), С. 6117 - 6122

Опубликована: Янв. 1, 2021

NiS₂ acts as an active and selective electrocatalyst for the two-electron O₂ reduction reaction in acids, achieving a selectivity of up to 99% H₂O₂ yield rate 109 ppm h⁻¹. The catalytic mechanism is further investigated by theoretical calculations.

Язык: Английский

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Improving the Oxygen Evolution Activity of Layered Double‐Hydroxide via Erbium‐Induced Electronic Engineering

Small, Год журнала: 2022, Номер 19(5)

Опубликована: Ноя. 29, 2022

Layered double-hydroxide (LDH) has been considered an important class of electrocatalysts for the oxygen evolution reaction (OER), but adsorption-desorption behaviors intermediates on its surface still remain unsatisfactory. Apart from transition-metal doping to solve this electrocatalytic problem LDH, rare-earth (RE) species have sprung up as emerging dopants owing their unique 4f valence-electronic configurations. Herein, Er is chosen a RE model improve OER activity LDH via constructing nickel foam supported Er-doped NiFe-LDH catalyst (Er-NiFe-LDH@NF). The optimal Er-NiFe-LDH@NF exhibits low overpotential (191 mV at 10 mA cm-2 ), high turnover frequency (0.588 s-1 and activation energy (36.03 kJ mol-1 which are superior Er-free sample. Electrochemical in situ Raman spectra reveal facilitated transition Ni-OH into Ni-OOH promoted kinetics through effect. Theoretical calculations demonstrate that introduction facilitates spin crossover valence electrons by optimizing d band center NiFe-LDH, leads GO -GHO closer kinetic volcano balancing bonding strength *O *OH. Moreover, presents practicability electrochemical water-splitting devices with driving potential well-extended period.

Язык: Английский

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Interfacial electronic modulation of Ni3S2 nanosheet arrays decorated with Au nanoparticles boosts overall water splitting

Applied Catalysis B Environment and Energy, Год журнала: 2021, Номер 304, С. 120935 - 120935

Опубликована: Ноя. 21, 2021

Язык: Английский

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