Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/167185
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Strong activation effect on a ru-co-c thin film catalyst for the hydrolysis of sodium borohydride |
Autor: | Arzac, G.M. CSIC ORCID CVN; Paladini, M. CSIC; Godinho, V. CSIC ORCID; Beltrán, Ana M.; Jiménez de Haro, María del Carmen CSIC ORCID; Fernández-Camacho, A. CSIC ORCID | Fecha de publicación: | 2018 | Editor: | Nature Publishing Group | Citación: | Scientific Reports, 8: 9755 (2018) | Resumen: | In this work, we prepared a series of Ni foam supported Ru-Co, Ru-Co-B and Ru-Co-C catalysts in the form of columnar thin films by magnetron sputtering for the hydrolysis of sodium borohydride. We studied the activity and durability upon cycling. We found a strong activation effect for the Ru-Co-C sample which was the highest ever reported. This catalyst reached in the second cycle an activity 5 times higher than the initial (maximum activity 9310 ml.min−1.gCoRu −1 at 25 °C). Catalytic studies and characterization of the fresh and used samples permitted to attribute the strong activation effect to the following factors: (i) small column width and amorphous character (ii) the presence of Ru and (iii) dry state before each cycle. The presence of boron in the initial composition is detrimental to the durability. Our studies point out to the idea that after the first cycle the activity is controlled by surface Ru, which is the most active of the two metals. Apart from the activation effect, we found that catalysts deactivated in further cycles. We ascribed this effect to the loss of cobalt in the form of hydroxides, showing that deactivation was controlled by the chemistry of Co, the major surface metal component of the alloy. Alloying with Ru is beneficial for the activity but not for the durability, and this should be improved | Versión del editor: | https://doi.org/10.1038/s41598-018-28032-6 | URI: | http://hdl.handle.net/10261/167185 | DOI: | 10.1038/s41598-018-28032-6 |
Aparece en las colecciones: | (ICMS) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
Arzac_et_al-2018-Scientific_Reports.pdf | 3,07 MB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
PubMed Central
Citations
1
checked on 18-abr-2024
SCOPUSTM
Citations
8
checked on 17-abr-2024
WEB OF SCIENCETM
Citations
8
checked on 23-feb-2024
Page view(s)
339
checked on 18-abr-2024
Download(s)
238
checked on 18-abr-2024