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Un complejo de níquel-fosfina como catalizador rápido y eficiente para la producción de hidrógeno

Lu Gan¹, Thomas L Groy, Pilarisetty Tarakeshwar

¹Department of Chemistry and Biochemistry, Arizona State University , Tempe, Arizona 85287, United States.

Journal of the American Chemical Society

|January 7, 2015

Resumen

Un nuevo complejo de níquel, [Ni(bdt) ((dppf) ], cataliza eficientemente la reducción de protones a hidrógeno. Este electrocatalizador demuestra alta actividad, bajo sobrepotencial y estabilidad en soluciones ácidas, ofreciendo una vía prometedora para la producción de hidrógeno.

Área de la Ciencia:

Química Inorgánica La química inorgánica es la química inorgánica.
La electrocatálisis por electrocatálisis.
Energía Sostenible Energía Sostenible

Sus antecedentes:

El desarrollo de electrocatalizadores eficientes para la producción de hidrógeno es crucial para la energía renovable.
Los complejos de níquel ofrecen potencial como alternativas abundantes en la tierra a los catalizadores de metales preciosos.

Objetivo del estudio:

Informar de un nuevo complejo de níquel coordinado S2P2, [Ni(bdt) ((dppf) ], para la reducción electrocatalítica de protones.
Para investigar la actividad catalítica, la eficiencia y la estabilidad de este complejo.

Principales métodos:

Reducción electrocatalítica de protones a hidrógeno.
Síntesis y caracterización del complejo [Ni ((bdt) ((dppf)) ].
Cálculos de la Teoría Funcional de Densidad (DFT) para aclarar el mecanismo catalítico.

Principales resultados:

El complejo [Ni ((bdt)) ((dppf)) ] exhibe una catálisis rápida y eficiente con una frecuencia de giro de 1240 s ((-1)).
Alcanzó un sobrepotencial de 265 mV para la mitad de la actividad a bajas concentraciones de ácido.
Estabilidad demostrada durante al menos 4 horas en solución ácida y catálisis con un ácido débil.

Conclusiones:

El nuevo complejo de níquel es un electrocatalizador altamente efectivo para la producción de hidrógeno.
Los cálculos de DFT apoyan un mecanismo que involucra la protonación en el centro del níquel.
La eficiencia, la estabilidad y la capacidad del catalizador para operar con ácidos débiles muestran un potencial significativo para aplicaciones prácticas.

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