Highly Active and Stable Nitrogen‐Doped Ruthenium Oxide/Titanium Nitride Composite Anode Electrocatalyst for Practical Proton Exchange Membrane Water Electrolyzers

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

Published: May 15, 2025

Abstract The application of ruthenium‐based catalysts in proton‐exchange membrane water electrolyzers is impeded by lattice oxygen mechanism and the subsequent structural collapse. Herein, a design strategy for preparation N‐doped RuO₂ using TiN nanoparticles as nitrogen source presented. in‐ situ characterization theoretical calculation reveal optimized evolution reaction (OER) on resulting N‐RuO 2 /TiN catalyst. incorporation low‐electronegativity N formation interfacial Ru−O−Ti bridge structure lead to redistribution electron density adjacent Ru sites, weakening Ru–O covalency inhibiting reactivity during electrocatalytic OER. Meanwhile, altered electronic structures also optimize adsorption energy intermediates, consequently facilitating pivotal intermediate *OOH enhancing activity. electrocatalyst displays extremely low OER overpotential 159 mV at 10 mA cm −2 0.5 m H SO 4 . Particularly, electrolysis single cell with anode conveys an voltage 1.78 V 3A degradation rate 26 µV h −1 1100 operation 1 A This work provides excellent catalyst industrial‐level electrolysis.

Language: Английский

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Engineering oxygen-evolving catalysts for acidic water electrolysis

Applied Physics Reviews, Journal Year: 2024, Volume and Issue: 11(2)

Published: May 22, 2024

The utilization of water electrolysis for green hydrogen (H2) production, powered by renewable energy, is a promising avenue sustainable development. Proton-exchange-membrane (PEMWE) stands out as one the most efficient H2 production technologies. However, implementing it on an industrial scale faces substantial challenges, particularly regarding oxygen evolution reaction (OER). OER, critical process with inherently slow kinetics requiring additional potential, significantly influences overall water-splitting efficiency. Most OER electrocatalysts in PEMWE struggle poor stability harsh acidic environments at high oxidative potentials. While rare-earth metal oxides, such iridium or ruthenium offer commercial oxygen-evolving (OECs), their use depends achieving economically and sustainably viable operations. An alternative approach involves developing low- non-noble metal-based OECs sustaining activity long-term durability. Although materials currently exhibit lower than noble-based OECs, notable progress has been made enhancing performance. This review provides overview recent advancements designing acidic-stable based low without noble contents. It delves into thermodynamics degradation mechanisms media, evaluation parameters stability, strategies active acid-stable challenges opportunities acid electrolysis. Through detailed analysis these aspects, aims to identify engineering actively durable OECs.

Language: Английский

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Ru doping and interface engineering synergistically boost the electrocatalytic performance of a WP/WP₂ nanosheet array for an efficient hydrogen evolution reaction

Nanoscale, Journal Year: 2024, Volume and Issue: 16(26), P. 12492 - 12501

Published: Jan. 1, 2024

The surface electronic structure and morphology of catalysts have a crucial impact on the electrocatalytic hydrogen evolution reaction performance. This work reports fabrication Ru-doped WP/WP2 heterojunction nanosheet array electrode via one-step phosphating treatment WO3 precursor. Benefitting from large electrochemical active arrays, rich interface, trace Ru atom doping, catalyst has fairly low overpotential 58.0 mV at 10 mA cm-2 Tafel slope 50.71 dec-1 in acid solution toward HER. Further, theoretical calculations unveil that doping interface effect synergistically optimized hence weakened adsorption capacity (H), which lowered Gibbs free energy (ΔGH*) consequently effectively improved HER may open new avenues for developing advanced nanoarray electrodes with efficient conversion.

Language: Английский

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Self-Supported Fe-Doped MoNi₄ Alloy Nanosheet Array as a Trifunctional Electrocatalyst for Water and Urea Splitting

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(12), P. 14609 - 14620

Published: June 7, 2024

Language: Английский

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Unbiased photoelectrochemical H2O2 coupled to H2 production via dual Sb2S3‐based photoelectrodes with ultralow onset potential

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(44)

Published: July 16, 2024

The productions of hydrogen peroxide (H

Language: Английский

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