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Reconstrucción de la superficie in situ y encapsulación de carbono para catalizadores Pt-Lean de alto rendimiento más
Jiho Min1, Jeong Hee Lee2, Keonwoo Ko3,4
1Hydrogen Fuel Cell Laboratory, Korea Institute of Energy Research (KIER), Daejeon, Republic of Korea.
Small (Weinheim an der Bergstrasse, Germany)
|February 11, 2026
Resumen
Los investigadores desarrollaron un nuevo proceso de un solo paso para un catalizador de platino (Pt) altamente activo y duradero para pilas de combustible. Este método reduce significativamente el uso y el costo de Pt al tiempo que mantiene un rendimiento superior, cumpliendo objetivos clave.
Área de la Ciencia:
- La electroquímica es electroquímica.
- Ciencia de los materiales Ciencia de los materiales.
- La catálisis por catálisis.
Sus antecedentes:
- Las aleaciones de platino (Pt) con metales de transición 3d mejoran la actividad de la reacción de reducción de oxígeno (ORR) en las células de combustible.
- La inestabilidad estructural y el alto costo de Pt limitan la aplicación práctica de los catalizadores actuales basados en Pt.
Objetivo del estudio:
- Desarrollar un catalizador altamente activo, duradero y rentable para pilas de combustible.
- Para reducir el contenido de platino manteniendo un alto rendimiento catalítico.
Principales métodos:
- Se empleó un nuevo proceso de síntesis "in situ en un solo paso".
- Este proceso induce simultáneamente la segregación de Pt y la formación de una capa de carbono porosa.
- El catalizador presenta una superficie segregada por Pt y una estructura de caparazón de carbono poroso.
Principales resultados:
- Contenido de Pt reducido en aproximadamente un 55% en comparación con los catalizadores comerciales.
- Logró una actividad superior de reacción de reducción de oxígeno (ORR) y durabilidad a largo plazo.
- El Departamento de Energía de Met (DOE) tiene como objetivo una carga de Pt significativamente menor (0.02 mg cm-2).
Conclusiones:
- El catalizador desarrollado ofrece un camino prometedor hacia catalizadores de pila de combustible de bajo costo y alto rendimiento.
- La estrategia de síntesis "in situ en un solo paso" proporciona una alternativa práctica a los métodos convencionales.
- Este enfoque mejora la estabilidad del catalizador y reduce la dependencia del costoso platino.
Palabras clave:
La segregación Pt es la segregación Pt.Es una aleación de PtCo.proceso de un solo paso in situ.Reacción de reacción de reducción de oxígeno.Células de combustible de membrana de electrolito de polímero células de combustible de membrana de electrolito de polímeroConcha de carbono porosa con una cáscara de carbono.ultrabajo Pt Pt.
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