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Stiboviologens-Decorado Sb₄ O₆ Clusters para la Reducción de Protones Electrocatalíticos a través de la esponja de

Liang Xu^1,2, Jianyue He¹, Yi Qiao^1,2

¹Frontier Institute of Science and Technology, Interdisciplinary Research Center of Frontier Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Engineering Research Center of Key Materials for Efficient Utilization of Clean Energy of Shaanxi Province, Xi'an Key Laboratory of Electronic Devices and Material Chemistry, Xi'an Jiaotong University, Xi'an, Shaanxi Province 710054, P. R. China.

Journal of the American Chemical Society

|October 17, 2025

Resumen

Los nuevos grupos de antimonio decorados con stiboviologens actúan como catalizadores moleculares eficientes para la reacción de evolución del hidrógeno (HER). Este avance ofrece una nueva vía para el diseño de catalizadores de grupo principal y el avance de la electrocatálisis acoplada a protones.

Área de la Ciencia:

Ciencias de los materiales
Catálisis
La electroquímica

Sus antecedentes:

Los materiales a base de antimonio (Sb) son prometedores para la catálisis de la reacción de evolución del hidrógeno (HER) debido a sus propiedades electrónicas.
Los desafíos sintéticos obstaculizan el desarrollo de arquitecturas moleculares bien definidas para catalizadores basados en Sb.

Objetivo del estudio:

Desarrollar una nueva estrategia sintética para acceder a nuevos grupos de Sb4O6 decorados con stiboviologen.
Investigar la actividad catalítica y el mecanismo de estos nuevos grupos de HER.

Principales métodos:

Acoplamiento oxidativo dirigido de stiboviógenos para sintetizar grupos de Sb4O6.
Caracterización electroquímica para evaluar la actividad redox y el comportamiento electrocrómico.
Cálculos de la Teoría Funcional de la Densidad (DFT) y mapeo del potencial electrostático para conocimientos mecanicistas.

Principales resultados:

Se sintetizaron con éxito dos nuevos grupos de Sb4O6 decorados por stiboviologens, SbVO-Me y SbVO-Ph.
Estos grupos demostraron una excelente actividad redox, transferencia de múltiples electrones y propiedades electrocrómicas.
La catálisis de HER homogénea logró un sobrepotencial de 535 mV (74,5% de eficiencia Faradaic), mientras que la catálisis heterogénea mostró una mayor actividad con un sobrepotencial reducido de 182 mV.

Conclusiones:

Stiboviologens representan una nueva clase de catalizadores moleculares del grupo principal para HER.
Se aclaró un mecanismo cooperativo de gestión de electrones-protones que involucra a viologen y núcleo Sb4O6.
Este trabajo amplía el diseño de sistemas redox basados en viógenos y ofrece oportunidades en electrocatálisis acoplada a protones.

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