Cluster‐Scale Multisite Interface Reinforces Ruthenium‐Based Anode Catalysts for Alkaline Anion Exchange Membrane Fuel Cells

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

Ruthenium (Ru) is a more cost-effective alternative to platinum anode catalysts for alkaline anion-exchange membrane fuel cells (AEMFCs), but suffers from severe competitive adsorption of hydrogen (Had) and hydroxyl (OHad). To address this concern, strongly coupled multisite electrocatalyst with highly active cluster-scale ruthenium-tungsten oxide (Ru-WOx) interface, which could eliminate the phenomenon achieve high coverage OHad Had at Ru WOx domains, respectively, designed. The experimental theoretical results demonstrate that domain functions as proton sponge perpetually accommodate activated species spillover adjacent domain, resulting WO-Had are readily Ru-OHad heterointerface finish oxidation reaction faster kinetics via thermodynamically favorable Tafel-Volmer mechanism. AEMFC delivers peak power density 1.36 W cm-2 low catalyst loading 0.05 mgRu outstanding durability (negligible voltage decay over 80-h operation 500 mA cm-2). This work offers completely new insights into understanding HOR mechanism designing advanced AEMFCs.

Language: Английский

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Mechanism and research progress of hydrogen spillover in hydrogen evolution reaction

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: 1004, P. 175883 - 175883

Published: Aug. 6, 2024

Language: Английский

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Atmosphere-driven oriental regulation of Ru valence for boosting alkaline water electrolysis

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 502, P. 158051 - 158051

Published: Nov. 29, 2024

Language: Английский

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Molybdenum Single-Atom Solid-Acid Catalyst for the Hydrogen Evolution Reaction in the Alkaline Electrolyte

ACS Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 2270 - 2281

Published: Jan. 24, 2025

Language: Английский

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Tailoring surface strain of Ru nanoparticles on carbon layers for accelerating hydrogen evolution reaction

Materials Letters, Journal Year: 2025, Volume and Issue: 388, P. 138301 - 138301

Published: Feb. 26, 2025

Language: Английский

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Anion engineering coupled with trace Pt boosts FeOOH for seawater splitting under industrial conditions

Fuel, Journal Year: 2025, Volume and Issue: 394, P. 135112 - 135112

Published: March 20, 2025

Language: Английский

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Regulating Reconstruction‐Engineered Active Sites of CoP Electrocatalyst by Br Ions During the Oxygen and Hydrogen Evolution Reaction

Energy & environment materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 23, 2025

An in‐depth understanding of the catalyst surface evolution is crucial for precise control active sites, yet this aspect has often been overlooked. This study reveals spontaneous anion regulation mechanism Br‐doped CoP electrocatalysts in alkaline hydrogen reaction (HER) and oxygen (OER). The introduction Br modulates electronic structure Co site, endowing Br‐CoP with a more metallic character. In addition, P ion leaching promotes situ reconstruction Br‐CoOOH, which real site OER reaction. Meanwhile, HER situation different. On basis leaching, ions formation CoP‐Co(OH) 2 species. doping enhances adsorption *H, showing excellent H free energy, thereby greatly improving activity. Simultaneously, it also OOH*, effectively facilitating occurrence reactions. only needs 261 76 mV overpotential to drive current density 20 mA cm −2 10 , can be maintained unchanged 100 h. provides new insights into strategies mechanisms.

Language: Английский

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Single-atom Ru-doped nickel sulfide nanostructures achieve superior water splitting performance via reconstruction and adsorption optimization

Journal of Material Science and Technology, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

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Cobalt-doped molybdenum carbide nanoparticles embedded in nitrogen-doped carbon nanosheets for efficient pH-universal hydrogen evolution

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2025, Volume and Issue: unknown, P. 137280 - 137280

Published: May 1, 2025

Language: Английский

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Hollow and Ultrathin Mo-Doped CoP Bamboo-Leaf Nanoarrays for pH-Universal Hydrogen Evolution

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(15), P. 17868 - 17876

Published: July 26, 2024

The rational design of cost-effective electrocatalysts for the hydrogen evolution reaction (HER) still remains a major challenge in continuable energy storage and conversion systems. In this study, vertically hollow ultrathin Mo-doped CoP (Mo-CoP) nanoarrays are prepared on nickel foam by hydrothermal low-temperature phosphating strategies. Mo-CoP possess bamboo-leaf structure with diameter ranging from 20 to 150 nm between top bottom length several microns. At same time, substance presents crystalline–amorphous structure. synergistic effect doping special construction can supply plentiful active sites, enhance electrolyte penetration, facilitate gas diffusion process electrocatalytic reaction. overpotentials electrode at 10 mA cm–2 as low 88.4, 78.7, 112.6 mV, Tafel slopes 87.2, 55.7, 120.3 mV dec–1 alkaline, acidic, neutral electrolytes, respectively. Moreover, catalyst also displays favorable long-term stability all pH ranges.

Language: Английский

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