Use of Rh (III)-Heteropolymolybdate as Potential Catalysts for the Removal of Nitrates in Human Drinking Water: Synthesis, Characterisation and Catalytic Performance

The investigation and development of technologies to remediate water contaminated with NO3 − are constantly increasing. An economically and potentially effective alternative is based on the catalytic hydrogenation of NO3 − to N2. With this objective, bimetallic RhMo6 catalysts based on Anderson-type...

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Autores principales: Jaworski, María Angélica, Bertolini, Guillermo Ramón, Cabello, Carmen Inés, Siri, Guillermo Jorge, Casella, Mónica Laura
Formato: Articulo
Lenguaje:Inglés
Publicado: 2018
Materias:
Química
Nitrate
Water pollution
Well-defined catalysts
Anderson phase
Hydrogenation
Synergic effect
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/115075
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-115075
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Nitrate
Water pollution
Well-defined catalysts
Anderson phase
Hydrogenation
Synergic effect
spellingShingle Química
Nitrate
Water pollution
Well-defined catalysts
Anderson phase
Hydrogenation
Synergic effect
Jaworski, María Angélica
Bertolini, Guillermo Ramón
Cabello, Carmen Inés
Siri, Guillermo Jorge
Casella, Mónica Laura
Use of Rh (III)-Heteropolymolybdate as Potential Catalysts for the Removal of Nitrates in Human Drinking Water: Synthesis, Characterisation and Catalytic Performance
topic_facet Química
Nitrate
Water pollution
Well-defined catalysts
Anderson phase
Hydrogenation
Synergic effect
description The investigation and development of technologies to remediate water contaminated with NO3 − are constantly increasing. An economically and potentially effective alternative is based on the catalytic hydrogenation of NO3 − to N2. With this objective, bimetallic RhMo6 catalysts based on Anderson-type heteropolyanion (RhMo6O24H6)3− were prepared and characteri3ed in order to obtain well-defined bimetallic catalyst. The catalysts were supported on Al2O3 with different textural properties and on silica. The heteropolyanion-support interaction was analysed by temperature-programmed reduction (TPR) and X-ray photoelectron spectroscopy (XPS). The differences obtained in activity and selectivity to the different products can be assigned to the different interaction between the RhMo6 Anderson phase and the supports. The RhMo6/G, (G: γ-Al2O3) system showed the best catalytic performance. This catalyst exhibited the lowest reduction temperature of Rh and Mo in the TPR assay and a Rh/Mo surface ratio similar to that of the original phase, as observed by XPS analysis. These studies allowed us to verify a synergic effect between Rh and Mo, through which Mo reducibility was promoted by the presence of the noble metal. The catalytic activity was favoured by the active sites generated from the Anderson phase. This fact was confirmed by comparing the activity of RhMo6/Gwith that corresponding to a conventional catalyst prepared through successive impregnation of both Rh (III) and Mo (VI) salts.
format Articulo
Articulo
author Jaworski, María Angélica
Bertolini, Guillermo Ramón
Cabello, Carmen Inés
Siri, Guillermo Jorge
Casella, Mónica Laura
author_facet Jaworski, María Angélica
Bertolini, Guillermo Ramón
Cabello, Carmen Inés
Siri, Guillermo Jorge
Casella, Mónica Laura
author_sort Jaworski, María Angélica
title Use of Rh (III)-Heteropolymolybdate as Potential Catalysts for the Removal of Nitrates in Human Drinking Water: Synthesis, Characterisation and Catalytic Performance
title_short Use of Rh (III)-Heteropolymolybdate as Potential Catalysts for the Removal of Nitrates in Human Drinking Water: Synthesis, Characterisation and Catalytic Performance
title_full Use of Rh (III)-Heteropolymolybdate as Potential Catalysts for the Removal of Nitrates in Human Drinking Water: Synthesis, Characterisation and Catalytic Performance
title_fullStr Use of Rh (III)-Heteropolymolybdate as Potential Catalysts for the Removal of Nitrates in Human Drinking Water: Synthesis, Characterisation and Catalytic Performance
title_full_unstemmed Use of Rh (III)-Heteropolymolybdate as Potential Catalysts for the Removal of Nitrates in Human Drinking Water: Synthesis, Characterisation and Catalytic Performance
title_sort use of rh (iii)-heteropolymolybdate as potential catalysts for the removal of nitrates in human drinking water: synthesis, characterisation and catalytic performance
publishDate 2018
url http://sedici.unlp.edu.ar/handle/10915/115075
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