Ultrathin PtNiW@WOx core-shell nanowires for enhanced CO-tolerant hydrogen oxidation: three-in-one catalyst design

Science China Materials, Год журнала: 2024, Номер 67(6), С. 1866 - 1875

Опубликована: Апрель 30, 2024

Platinum (Pt) is the state-of-the-art electrocatalyst for anodic hydrogen oxidation reaction (HOR) in proton exchange membrane fuel cells (PEMFCs). However, a critical drawback of PEMFCs extreme sensitivity Pt catalyst to CO (impurity industrial hydrogen), which markedly damages device's performance. Therefore, enhancing CO-tolerant performance catalysts crucial commercialization PEMFCs. Herein, we constructed PtNiW@amorphous WOx core-shell nanowires improve CO-tolerance Pt. Mechanistically, it demonstrated that surface amorphous shell can kinetically hinder accessibility over sites by acting as selective molecular-sieving layer. Besides, thermodynamically, electronic effect from alloying Ni and W elements could weaken adsorption on downshifting d-band center. In addition, oxyphilic accelerate dissociation water provide more OH species, promoting CO. As consequence, as-designed PtNiW@WOx NWs maintain 90% HOR current density after 4000 s 1000 ppm CO/H2, exceeding most Pt-based reported ever.

Язык: Английский

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RuSe₂ and CoSe₂ Nanoparticles Incorporated Nitrogen-Doped Carbon as Efficient Trifunctional Electrocatalyst for Zinc–Air Batteries and Water Splitting

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(19), С. 24660 - 24670

Опубликована: Май 6, 2024

The development of affordable, highly active, and stable trifunctional electrocatalysts is imperative for sustainable energy applications such as overall water splitting rechargeable Zn–air battery. Herein, we report a composite electrocatalyst with RuSe2 CoSe2 hybrid nanoparticles embedded in nitrogen-doped carbon (RuSe2CoSe2/NC) synthesized through carbonization–adsorption–selenylation strategy. This excellent hydrogen evolution reaction (HER), oxygen (OER), reduction (ORR) activities. An in-depth study the effect Se on electrocatalytic process was conducted. Notably, incorporation moderately adjusted electronic structure Ru Co, enhancing all three types catalytic performance (HER, η10 = 31 mV; OER, 248 ORR, E1/2 0.834 V) under alkaline condition accelerated kinetics improved stability. Density functional theory (DFT) calculation reveals that (210) crystal facet dominant HER active site it exhibited lowest ΔGH* value. situ Raman spectra unravel local environment Co–Se Ru–Se bonds, which synergistically promotes formation CoOOH intermediate during OER. superior efficiency remarkable durability RuSe2CoSe2/NC an electrode zinc–air battery devices demonstrate its great potential storage conversion devices.

Язык: Английский

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Design of Electrocatalysts with High Performance Based on Thermodynamics and Kinetics: Progress and Prospects

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 15, 2024

Abstract Efficient and robust electrocatalysts play a central role in clean energy conversion, enabling number of sustainable processes for future technologies. The traditional explorations electrocatalyst relying on the trial‐and‐error approaches are definitely tedious inefficient. Theoretical progresses reactive thermodynamics kinetics recent years have initiated powerful theory‐guided design strategy electrocatalysts. Herein, this review first summarizes principles activity stability, presenting thermodynamics, kinetics, synergistic thermokinetic correlation electrocatalytic reaction. Second, screening criterion, reasonable design, mechanistic understanding, performance evaluation typical as divided into oriented‐, oriented‐designs discussed. necessity correlating rational mechanism clarification is highlighted. Finally, conclusions perspectives development highly efficient proposed.

Язык: Английский

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Carbon dots tailoring the interfacial proton and charge transfer of iridium nanowires with stress strain for boosting bifunctional hydrogen catalysis

Journal of Colloid and Interface Science, Год журнала: 2023, Номер 653, С. 434 - 442

Опубликована: Сен. 15, 2023

Язык: Английский

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Recent progress in alkaline electrocatalytic hydrogen oxidation reaction: Mechanisms, catalysts design and perspectives

Coordination Chemistry Reviews, Год журнала: 2025, Номер 528, С. 216427 - 216427

Опубликована: Янв. 9, 2025

Язык: Английский

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