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Generación de oxígeno puro a partir de agua salada por catálisis binaria
Thomas P Keane1, Samuel S Veroneau1, Alaina C Hartnett1
1Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States.
Journal of the American Chemical Society
|February 27, 2023
Resumen
Ahora es posible generar oxígeno puro a partir de salmuera. Un nuevo catalizador previene reacciones no deseadas, permitiendo la producción de oxígeno para usos submarinos y médicos.
Área de la Ciencia:
- La electroquímica
- Ciencias de los materiales
- Ciencias del medio ambiente
Sus antecedentes:
- La división del agua se centra principalmente en la producción de hidrógeno, pasando por alto el valor del oxígeno generado.
- La producción de oxígeno puro a partir de agua salada (salmuera, agua de mar) se ve obstaculizada por las reacciones de oxidación de halogenuros.
- La oxidación de haluros produce halógenos y ácidos hipohalosos, lo que complica la purificación de oxígeno.
Objetivo del estudio:
- Para demostrar la generación de oxígeno puro (O2) a partir de agua salada.
- Para superar los desafíos planteados por la oxidación de haluros durante la electrólisis del agua.
- Explorar la producción de oxígeno para aplicaciones medicinales submarinas y del mundo en desarrollo.
Principales métodos:
- Desarrollo de un catalizador de evolución de oxígeno con una capa superior especializada.
- La capa superior está diseñada para rechazar aniones halogenados basados en su punto de carga cero.
- La capa superior también facilita la desproporción de los ácidos hipohalosos.
Principales resultados:
- Se logró la generación exitosa de O2 puro a partir de agua salada.
- La capa superior del catalizador suprimió efectivamente la oxidación del haluro.
- El catalizador promovió la desproporción del ácido hipohalo, evitando la contaminación.
Conclusiones:
- Un nuevo enfoque catalítico permite la generación de oxígeno puro a partir de fuentes salinas.
- Este método aborda el desafío de la interferencia de haluros en la electrólisis del agua.
- La tecnología tiene potencial para aplicaciones críticas en entornos submarinos y medicina.
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