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Tonabilidad de los electrocatalizadores de benzenohexatiolato de níquel para la reacción de evolución del hidrógeno

Ashley Tu Anh Nguyen¹, Yashna Khakre¹, Amir Avishai²

¹Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States.

ACS applied materials & interfaces

|September 2, 2025

Resumen

Las estructuras de níquel benzenohexatiolato (NiBHT) son prometedoras como electrocatalisadores eficientes para la reacción de evolución del hidrógeno. Los marcos de NiBHT de nanopartículas exhiben una mayor actividad y estabilidad en condiciones ácidas para aplicaciones de energía sostenible.

Área de la Ciencia:

Ciencias de los materiales
La electroquímica
Catálisis

Sus antecedentes:

Los polímeros de coordinación basados en ditoileno ofrecen potencial para aplicaciones energéticas sostenibles.
La incorporación de catalizadores moleculares en los marcos puede mejorar el rendimiento y la reutilización.

Objetivo del estudio:

Investigar las estructuras del benzenohexatiolato de níquel (NiBHT) como electrocatalisadores para la reacción de evolución del hidrógeno (HER).
Determinar las características esenciales de los electrocatalizadores HER eficientes mediante la variación de la morfología y porosidad del NiBHT.

Principales métodos:

Síntesis de polímeros de coordinación de NiBHT con diferentes morfologías y porosidades.
Caracterización electroquímica, incluidas las mediciones del potencial de inicio y del sobrepotencial.
Electrolisis de potencial controlada para evaluar la estabilidad catalítica y la eficiencia Faradaic.

Principales resultados:

El polímero de coordinación de NiBHT no poroso en la morfología de nanopartículas mostró una mayor actividad electroquímica.
Se logró un potencial de inicio de -128 mV y un sobrepotencial de 225 mV a 10 mA/cm2.
90% La eficiencia Faradaic después de 2 h de electrólisis potencial controlada indicó una alta estabilidad.

Conclusiones:

Los polímeros de coordinación NiBHT son electrocatalizadores eficientes para el HER en medios ácidos.
La morfología de las nanopartículas y la estructura no porosa son características clave para mejorar el rendimiento de HER.
Los materiales a base de ditoileno que contienen iones de níquel son prometedores para las aplicaciones de evolución del hidrógeno.

Palabras clave:

nanohoja de coordinación Polímero de coordinación electrocatálisis Evolución del hidrógeno Morfología dietioleno de níquel

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