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Catalizador de metaleno de rodio-níquel de fácil ingeniería para la producción de hidrógeno asistida por urea

Baojian Xie¹, Chunjie Li², Ruian Fan²

¹School of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou 215009, China; School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.

Journal of colloid and interface science

|September 5, 2025

Resumen

Este estudio presenta un nuevo catalizador de metaleno de rodio-níquel (RhNi) para la producción eficiente de hidrógeno. El catalizador bifuncional sobresale tanto en la evolución del hidrógeno (HER) como en la oxidación de la urea (UOR), lo que reduce significativamente los requisitos de energía para la electrólisis.

Área de la Ciencia:

La electroquímica
Ciencias de los materiales
Catálisis

Sus antecedentes:

La generación eficiente de hidrógeno es crucial para las soluciones energéticas sostenibles.
La integración de la reacción de evolución del hidrógeno (HER) y la reacción de oxidación de la urea (UOR) ofrece ahorros de energía.
El desarrollo de catalizadores bifuncionales efectivos para HER y UOR simultáneos sigue siendo un desafío.

Objetivo del estudio:

Síntesis y caracterización de un nuevo catalizador bidimensional de rodio-níquel (RhNi).
Evaluar el rendimiento del catalizador tanto para HER como para UOR.
Evaluar el potencial del catalizador en un sistema integrado de electrólisis de hidrógeno de alta eficiencia energética.

Principales métodos:

Se empleó un enfoque hidrotermal de dos pasos para sintetizar el metaleno 2D RhNi con una estructura de nanohoja arrugada.
Se utilizaron técnicas electroquímicas para medir los potenciales excesivos de HER y UOR a una densidad de corriente de 10 mA cm-2.
El rendimiento del metaleno RhNi se evaluó en una configuración de electrolizador HER.

Principales resultados:

El catalizador de metaleno RhNi exhibe una estructura de nanohoja arrugada con abundantes sitios activos y una transferencia de carga mejorada.
El catalizador muestra bajos sobrepotenciales para HER (27 mV) y UOR (1,36 V) a 10 mA cm-2.
El sistema HERgadgadgadUOR integrado que utiliza metaleno RhNi requiere sólo 1,42 V para un funcionamiento de 10 mA cm−2, una reducción de 210 mV en comparación con la electrólisis tradicional del agua.

Conclusiones:

El metaleno RhNi desarrollado es un catalizador bifuncional altamente eficaz para la producción de hidrógeno con ahorro de energía.
La integración de Ni modula el centro de la banda d y optimiza las energías de adsorción, mejorando la actividad catalítica.
Este trabajo ofrece una vía prometedora para el diseño de materiales avanzados para la conversión eficiente de energía electroquímica.

Palabras clave:

La electrocatálisis Ahorro de energía Reacción de evolución del hidrógeno Metálicos de hidrógeno Reacción de oxidación de la urea

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