Video Experimental Relacionado

Updated: Feb 27, 2026

The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes

The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes

Published on: April 10, 2015

Activación de puentes de oxígeno de lr─O─Ru por Sn para mejorar la reacción de evolución de oxígeno ácida

Yanqin Li¹, Bin Fang², Chunlin Li³

¹School of Materials Science and Engineering, Dongguan University of Technology, Dongguan, Guangdong, China.

Advanced materials (Deerfield Beach, Fla.)

|February 26, 2026

Abstract:

The development of efficient and stable electrocatalysts for the oxygen evolution reaction (OER) is crucial for advancing the commercialization of proton exchange membrane water electrolyzers (PEMWEs). Here, we report a ternary oxide catalyst, Ir-RuSnO_x, in which atomically dispersed Ir substitutes surface Ru sites to construct an Ir─O─Ru atomic interface. The catalyst requires an overpotential of only 165 mV to deliver 10 mA cm^- ² and maintains stable operation for over 350 h at 100 mA cm^- ². When integrated into a PEMWE, Ir-RuSnO_x sustains continuous operation at 1 A cm^- ² for 800 h without observable degradation. Combined electrochemical and theoretical studies reveal that Sn acting as a strong electron donor, enhances electron localization at the bridging oxygen (O_bri) within the Ir─O─Ru motif. This enables O_bri as a proton acceptor, facilitating deprotonation of O─H and OO─H species at Ru sites, thereby forming O_bri─H intermediates, lowering the energy barrier of the rate-determining step (RDS), and accelerating OER kinetics. Simultaneously, Sn incorporation increases the electron density of the Ir─O─Ru structure, strengthening its resistance against oxidative degradation. These findings offer a path to achieving both high activity and long-term durability in acidic OER electrocatalysts.

Palabras clave:

oxidación de agua ácida desprotonación electrocatalisis producción de hidrógeno

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