CoFe-Layered Double Hydroxide Needles on MoS₂/Ni₃S₂ Nanoarrays for Applications as Catalysts for Hydrogen Evolution and Oxidation of Organic Chemicals

ACS Applied Nano Materials, Год журнала: 2024, Номер 7(6), С. 6449 - 6459

Опубликована: Март 14, 2024

Electrochemical water splitting prompted by organic molecules presents a competitive prospect for implementing energy-efficient hydrogen evolution and alleviating organic-rich pollution. In this work, we fabricated heterojunction of CoFe-layered double hydroxide (CoFe LDH) needles on MoS2/Ni3S2/nickel foam (NF) nanoarrays LDH/MoS2/Ni3S2/NF) forming Schottky interface p–p interface. The prepared CoFe LDH/MoS2/Ni3S2/NF exhibits superior electrocatalytic activities with low potentials to drive 50 mA cm–2 the reaction (HER, 0.098 V vs reversible electrode (RHE)), oxygen (OER, 1.507 RHE), urea oxidation (UOR, 1.460 ethanol (ETOR, 1.484 RHE). Meanwhile, can maintain robust stability in these reactions. enhanced result from increased active sites acceleration charge transfer caused built-in electric fields. Moreover, catalyst also remarkable catalytic performance two-electrode systems KOH, KOH assisted urea, polylactic acid. This work offers rational method designing efficient electrocatalysts via combining heterojunctions effectively generate energy treat pollutants.

Язык: Английский

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Enhanced electro-catalytic activity of carbon-supported PtRh nano-catalysts for ethanol electro-oxidation in low-temperature fuel cell

Ionics, Год журнала: 2025, Номер 31(3), С. 2637 - 2655

Опубликована: Янв. 21, 2025

Язык: Английский

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Freezing-Mediated Synthesis and Applications of Porous Metals

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

Опубликована: Май 8, 2025

Porous metals combine the physicochemical properties of and structural features porous materials, which are characterized as a special class materials promising in various fields such tissue engineering, energy storage conversion, electronics, sensing. Among diverse fabrication approaches, freezing-mediated synthesis (e.g., freeze-casting freeze-thawing) stands out due to its strong controllability over meso-to-macroscales well environmental friendliness. Many efforts have been made past few decades, yielding library featuring different building blocks (feature size dimension), morphologies, compositions by identifying optimizing synthetic parameters. However, deep understanding ice-matter interactions is limited, becomes more pronounced when processed system transforms from micrometer nanometer size. Therefore, an overview analysis for essential. This review first introduces history metals, followed fundamentals freezing process design strategies. Afterward, summarized aspect their blocks, application explorations those special-structure metals. Finally, challenges opportunities concluded guide future research designing advanced freezing-based approaches.

Язык: Английский

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Investigation of electrode scaling-up strategies for paper-based microfluidic fuel cells

Renewable Energy, Год журнала: 2024, Номер 235, С. 121316 - 121316

Опубликована: Сен. 6, 2024

Язык: Английский

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Low-Loaded Pt Nanoparticles Supported on Electrochemically Exfoliated Graphene as a Sustainable Catalyst for Electrochemical Ethanol Oxidation

Sustainability, Год журнала: 2024, Номер 16(18), С. 8189 - 8189

Опубликована: Сен. 20, 2024

Securing ever-increasing energy demands while reducing resilience on fossil fuels is a major task of modern society. Fuel cells are devices in which the chemical various can be converted into clean electricity. Direct ethanol fuel (DEFC) increasingly popular for their eco-friendliness and significantly easier liquid manipulation compared to hydrogen-fed cells. Carbon-supported Pt nanoparticles considered reference catalysts oxidation DEFCs. Several challenges hinder DEFC commercialization: high Pt-loading, poisoning by CO intermediates, instability carbon supports. This work demonstrates an efficient electrocatalyst reaction (EOR) composed supported electrochemically exfoliated graphene (Pt/el-rGO). Graphene was obtained through anodic electrochemical exfoliation using graphitic tape as anode, were synthesized reduction with formic acid. As-obtained Pt/el-rGO only 7.5 wt.% characterized TEM, SEM, XPS. exhibited notably higher EOR catalytic activity alkaline electrolyte than Pt/C benchmark. enhancement linked functional groups present support, facilitate dehydrogenation first step mechanism thus enhance kinetics Pt-active sites.

Язык: Английский

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Recent advances in constructing efficient electrocatalysts for ethanol oxidation reaction

Journal of Alloys and Compounds, Год журнала: 2024, Номер 1001, С. 175120 - 175120

Опубликована: Июнь 12, 2024

Язык: Английский

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