Enhanced Electrocatalytic Hydrogen Peroxide Production via a CuWO₄/WO₃ Heterojunction with High Selectivity and Stability

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Янв. 12, 2025

The electrocatalytic conversion of oxygen to hydrogen peroxide offers a promising pathway for sustainable energy production. However, the development catalysts that are highly active, stable, and cost-effective synthesis remains significant challenge. In this study, novel polyacid–based metal–organic coordination compound (Cu–PW) was synthesized using hydrothermal approach. Cu–PW served as precursor construct composite electrocatalyst featuring heterointerface between CuWO4 WO3 (CuWO4/WO3) through pyrolysis. CuWO4/WO3 heterojunction exhibits an impressive H2O2 selectivity 91.84% at 0.5 V, marking 19.65% improvement compared pristine Cu–PW. Furthermore, catalyst demonstrates exceptional stability, maintaining continuous operation 29 h. At 0.1 it delivers yield 1537.8 mmol g–1 h–1, with Faraday efficiency (FE) 85%. Additionally, effectively degrades methyl blue, achieving 95% removal from aqueous system within 30 min. Theoretical analysis further corroborates high electroactivity structure. Cu–O–W bridge formed during reaction facilitates interfacial electron transport enhances role W–O bond in proton adsorption transfer kinetics. This strong coupling promotes formation *OOH intermediates, thereby favoring generation. Hence, as-prepared great potential efficient green peroxide, exhibiting two-electron reduction catalyst. work new approach fabricating selectivity, paving way production, significantly reducing reliance on conventional anthraquinone process.

Язык: Английский

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Selenate-based heterojunction with cobalt-nickel paired site for electrocatalytic oxidation of 5-hydroxymethylfurfural coupling water splitting to produce hydrogen

Journal of Energy Chemistry, Год журнала: 2024, Номер 101, С. 156 - 162

Опубликована: Окт. 2, 2024

Язык: Английский

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Ultrafine Ni-Doped FeOOH Nanoparticles with Rich Oxygen Vacancies to Promote Oxygen Evolution

Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Апрель 9, 2025

Nickel iron hydroxide oxide is one of the efficient catalysts for oxygen evolution reaction (OER). However, current synthesis methods, such as solvothermal and electrodeposition, require stringent experimental conditions (e.g., temperature, pressure, solvent) involve complex procedures with high costs. To address this issue, we developed a simple electrostatic self-assembly strategy to synthesize Ni-doped oxyhydroxide (Ni-FeOOH) by combining aminated two-dimensional g-C3N4 trace amounts Ni2+ Fe2+, forming tightly integrated heterostructure (Ni-FeOOH@g-C3N4). This method notable its simplicity ability produce ultrasmall Ni-FeOOH nanoparticles (∼1.9 nm), which significantly enhance active surface area functional sites. The resulting catalyst exhibits exceptional OER performance, achieving low overpotential 260 mV at 10 mA·cm-2 demonstrating long-term stability. Remarkably, despite containing only Ni (2.46%) Fe (3.36%), Ni-FeOOH@g-C3N4 delivers turnover frequency 3.96 s-1, outperforming many conventional hydroxyl oxides. improved performance attributed particle size presence excessive vacancies, lower energy barrier O* formation accelerate kinetics. work proposes constructing metals improve activity.

Язык: Английский

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Sea urchin-like nickel-doped cobalt selenide decorated on graphitic carbon nitride nanosheets as efficient electrocatalysts for oxygen evolution reaction in alkaline medium

International Journal of Hydrogen Energy, Год журнала: 2025, Номер 133, С. 491 - 501

Опубликована: Май 5, 2025

Язык: Английский

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Seamless construction of self-supporting nanoporous FeCoZn alloy as one highly efficient electrocatalyst for oxygen evolution reaction in alkaline media

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 68, С. 900 - 909

Опубликована: Май 1, 2024

Язык: Английский

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One-step Fabrication of P-Co5.47N/Co9S8@NPC Heterojunction Derived from Saccharomycetes Cerevisiae as Environment-Friendly Bifunctional High-efficiency Electrocatalysts

Colloids and Surfaces A Physicochemical and Engineering Aspects, Год журнала: 2024, Номер 697, С. 134411 - 134411

Опубликована: Июнь 3, 2024

Язык: Английский

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Facile electrodeposition of Iron-doped NiMo alloys as bifunctional electrocatalysts for alkaline overall water splitting

Fuel, Год журнала: 2024, Номер 381, С. 133302 - 133302

Опубликована: Сен. 28, 2024

Язык: Английский

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One-pot synthesis of Co3S4/MnS2/g-C3N4 nanocomposites as a high efficiency catalyst for oxygen evolution reaction

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 99, С. 640 - 648

Опубликована: Дек. 19, 2024

Язык: Английский

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Accurate optimizing proton exchange membrane fuel cell parameters using fitness deviation-based adaptive differential evolution

Ionics, Год журнала: 2024, Номер unknown

Опубликована: Дек. 23, 2024

Язык: Английский

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Facile Electrodeposition of Iron-Doped Nimo Alloys as Bifunctional Electrocatalysts for Alkaline Overall Water Splitting

Опубликована: Янв. 1, 2024

Nickel-molybdenum (NiMo) alloy has been widely concerned in the field of electrocatalytic hydrogen evolution because its excellent performance, but at same time, NiMo also faces problem poor oxygen activity and molybdenum dissolution. Unlike other processes involving high-temperature high-pressure reactions, electrodeposition advantages a simple preparation device, controllable synthesis conditions shorter time. Herein, alloys with different iron content were prepared by one-step method. The results XRD TEM demonstrate successful doping Fe. Doping Fe affects electronic structure NiMo, accelerates electron transfer increases number active sites. Fe0.2-NiMo shows best catalytic performance HER/OER overpotential 85 mV 269 respectively 10 mA cm-2. can be applied large current, is only 319 316 when current density 500 resulting cell requires 1.9 V voltage to achieve This work proves that strategy an efficient feasible for designing bifunctional based electrocatalysts high activity.

Язык: Английский

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