Monodisperse Ag/Pd core/shell nanoparticles assembled on reduced graphene oxide as highly efficient catalysts for the transfer hydrogenation of nitroarenes

Metin O., CAN H., ŞENDİL K., GÜLTEKİN M. S.

JOURNAL OF COLLOID AND INTERFACE SCIENCE, cilt.498, ss.378-386, 2017 (SCI-Expanded, Scopus)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 498
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1016/j.jcis.2017.03.066
  • Dergi Adı: JOURNAL OF COLLOID AND INTERFACE SCIENCE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.378-386
  • Anahtar Kelimeler: Silver-palladium, Core/shell nanoparticles, Reduced graphene oxide, Transfer hydrogenation, Nitroarenes reduction, CORE-SHELL NANOPARTICLES, AMMONIA BORANE, ALLOY NANOPARTICLES, HYDROLYTIC DEHYDROGENATION, NITROAROMATIC COMPOUNDS, STORAGE, MUTAGENICITY, REDUCTION
  • Atatürk Üniversitesi Adresli: Evet

Özet

Addressed herein is a facile seed-mediated synthesis of Ag/Pd core/shell nanoparticles (NPs) and their assembly on reduced graphene oxide (rGO) to catalyze the transfer hydrogenation of nitroarenes to anilines using ammonia borane (AB) as a hydrogen donor under ambient conditions. Monodisperse Ag/Pd core/shell NPs with controllable Pd shell-thickness were synthesized by the means of thermal decomposition of palladium(II) bromide over as-prepared Ag NPs in the mixture of oleylamine and oleic acid at 220 degrees C. As-synthesized Ag/Pd core/shell NPs were characterized by TEM, HR-TEM, XRD, XPS, UV-Vis spectroscopy and ICP-MS and then they were assembled on reduced graphene oxide (rGO). Next, rGO@Ag/Pd catalysts were tested in the transfer hydrogenation of nitroarenes in which ammonia borane (AB) was used as a hydrogen donor at room temperature. It was demonstrated that the thickness of the Pd shell has a significant effect on the catalytic activity of rGO@Ag/Pd catalysts and the 1.75 nm Pd shell provided the highest performance in the transfer hydrogenation reactions. The rGO@Ag/Pd catalyzed transfer hydrogenation reactions were tested over a variety of nitroarenes (total 16 examples) and they were all converted to the corresponding aniline derivatives with high yields in 5-15 min under ambient conditions. (C) 2017 Elsevier Inc. All rights reserved.