The Effect of Oleic Acid Stabilizer on the Surface Properties of Bimetallic PtNi Catalysts

Abstract : A detailed study on the surface properties of oleic acid-stabilized PtNi nanoparticles supported on silica is reported. The oleic acid-stabilized PtNi nanoparticles were synthesized using NaBH4 as the reducing agent at various temperatures and oleic acid concentrations, prior to incorporation onto the silica support. X-ray diffraction studies of the unsupported oleic acid-stabilized PtNi particles revealed that the PtNi existed as alloys. Upon incorporation onto silica support, surface properties of the catalysts were investigated using H-2-temperature reduction (H-2-TPR), H-2-temperature desorption (H-2-TPD) and H-2-chemisorption techniques. It was found that for the bimetallic catalysts, no oxides or very little oxidation occurred. Furthermore, these catalysts exhibited both Pt and Ni active sites on its surface though the availability of Ni active sites was dominant. A comparison of the surface properties of these materials with those prepared without oleic acid in our previous work [N. H. H. Abu Bakar et al., J. Catal. 265, 63 (2009)] and how they affect the hydrogenation of benzene is also discussed.
Type de document :
Article dans une revue
Journal of Nanoscience and Nanotechnology, American Scientific Publishers, 2013, 13 (7), pp.5034-5043. 〈10.1166/jnn.2013.7596〉
Domaine :
Liste complète des métadonnées

https://hal.univ-lorraine.fr/hal-01494082
Contributeur : Srsmc Ul <>
Soumis le : mercredi 22 mars 2017 - 16:40:14
Dernière modification le : mardi 16 janvier 2018 - 10:24:44

Identifiants

Collections

Citation

N. H. H. Abu Bakar, M. Abu Bakar, Mohammed Bettahar, J. Ismail, S. Monteverdi. The Effect of Oleic Acid Stabilizer on the Surface Properties of Bimetallic PtNi Catalysts. Journal of Nanoscience and Nanotechnology, American Scientific Publishers, 2013, 13 (7), pp.5034-5043. 〈10.1166/jnn.2013.7596〉. 〈hal-01494082〉

Partager

Métriques

Consultations de la notice

22