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Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O
Published on: October 7, 2020
Reducción directa de nitrito a N2 en un electrodo Pt{100} en un medio alcalino
Matteo Duca1, Mar Oroval Cucarella, Paramaconi Rodriguez
1Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands. m.duca@chem.leidenuniv.nl
Journal of the American Chemical Society
|December 15, 2010
Resumen
Los investigadores lograron la reducción selectiva de nitrito a gas nitrógeno en un electrodo de platino. Este nuevo hallazgo en las superficies de platino (Pt) 100 abre nuevas vías para la catálisis electroquímica.
Área de la Ciencia:
- La electroquímica es electroquímica.
- La catálisis de la catálisis.
- Ciencias de la superficie Ciencias de la superficie.
Sus antecedentes:
- Las superficies de platino (Pt) son muy activas para la reducción de nitrito (NO) en medios alcalinos.
- Estudios anteriores no han informado de la reducción selectiva de nitrito a gas nitrógeno (N2) en Pt100.
Objetivo del estudio:
- Para investigar la reducción electroquímica selectiva de nitrito (NO) a gas nitrógeno (N2) en un electrodo de platino (Pt) 100.
- Para identificar potenciales intermediarios de reacción en este proceso.
Principales métodos:
- Los experimentos electroquímicos se llevaron a cabo utilizando un electrodo Pt(100) en 0,1 M NaOH.
- Se empleó la espectrometría de masas electroquímica en línea para analizar los productos de reacción e intermedios.
Principales resultados:
- Se logró la reducción selectiva de nitrito (NO) a gas nitrógeno (N2) dentro de una ventana de potencial específica.
- El amoníaco y el óxido nitroso se identificaron como no intermediarios utilizando espectrometría de masas.
- Los adsorbados NH(2) se proponen como potenciales intermediarios basados en la literatura existente.
Conclusiones:
- El electrodo Pt(100) demuestra una selectividad única para la reducción de nitrito a gas nitrógeno.
- Los hallazgos contribuyen a la comprensión de los mecanismos de reacción electroquímica en las superficies de platino.
- Este trabajo establece una nueva vía para la generación de gas nitrógeno a través de la reducción de nitrito.
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