Iodine-Induced Redirection of Active Sources in Cu-Based Catalysts during Efficient and Stable Water Oxidation

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: April 25, 2025

Enhancing the mechanistic regulation of oxygen evolution reaction (OER) is crucial for developing efficient and stable electrocatalysts. However, dynamic variation surface structure during electrocatalytic process limits accurate identification active source underlying mechanism. Herein, we report an iodine-doping strategy to direct reconstruction species in CuS catalysts toward unconventional vacancy oxidation mechanism, thereby overcoming activity stability limitations. Mechanistic analysis indicates that electronic manipulation, weak coordination Cu-S bonds, lattice distortion induced by facilitate thermodynamically favorable Cu2+ Cu3+ OER. The decisively formed vacancies are emphasized as a genuine promote hydroxyl adsorption, with hypervalent Cu acting auxiliary sites accelerate deprotonation strengthening Cu-O covalent. Consequently, optimal iodine-doped exhibits reduced overpotential 189 mV at 10 mA cm-2 superb prolonging 1250 h. When used bifunctional electrode membrane assembly electrolyzer, it also low voltage 1.65 V 1 A cm-2, electrolysis durability 480 h hydrogen cost US$1.70/kg H2, outperforming 2026 targets set U.S. Department Energy.

Language: Английский

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Plasma-assisted Surface Modification and Formation of Oxygen Vacancies in Coffee-derived Carbon for Triboelectric Energy Harvesting and Electrocatalytic Water Splitting

Nano Energy, Journal Year: 2025, Volume and Issue: unknown, P. 111116 - 111116

Published: May 1, 2025

Language: Английский

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Advanced In Situ Spectroscopic Techniques for Probing the Acidic Oxygen Evolution Reaction

The Journal of Physical Chemistry C, Journal Year: 2024, Volume and Issue: 128(41), P. 17219 - 17239

Published: Oct. 7, 2024

Proton exchange membrane water electrolysis (PEMWE) is a promising technology for sustainable hydrogen production. However, the anodic oxygen evolution reaction (OER) critical bottleneck restricting power-to-gas efficiency and widespread application of PEMWE devices because harsh acidic oxidative environment causes drastic catalyst structural thus severe dissolution/corrosion as well performance degradation. Currently, lack deep insight identifying real catalytic sites during distinctions mechanisms have hindered development highly active durable OER catalysts PEMWE. Therefore, elucidating OER-induced structure understanding underlying are recognized foundations technology. Against this backdrop, in situ spectroscopic characterization techniques serve powerful tools achieving goal by enabling real-time monitoring capture key intermediates. This Account summarizes recent advances cutting-edge spectroscopy probing process. The fundamentals device configurations these briefly introduced, advantages each technique intermediates to unveil also been discussed. Finally, challenges, trends, prospects field presented.

Language: Английский

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Engineering eg filling of RuO2 enables a robust and stable acidic water oxidation

Chinese Chemical Letters, Journal Year: 2024, Volume and Issue: unknown, P. 110612 - 110612

Published: Nov. 1, 2024

Language: Английский

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Strategic modulation of CoFe sites for advanced bifunctional oxygen electrocatalyst

Chinese Journal of Structural Chemistry, Journal Year: 2024, Volume and Issue: unknown, P. 100470 - 100470

Published: Nov. 1, 2024

Language: Английский

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