Nanoalumina supported palladium(0) nanoparticle catalyst for releasing H-2 from dimethylamine borane


KARABOĞA S., ÖZKAR S.

APPLIED SURFACE SCIENCE, vol.487, pp.433-441, 2019 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 487
  • Publication Date: 2019
  • Doi Number: 10.1016/j.apsusc.2019.05.087
  • Journal Name: APPLIED SURFACE SCIENCE
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.433-441
  • Keywords: Dehydrogenation, Dimethylamine borane, Heterogeneous catalyst, Palladium(0) nanoparticles, Hydrogen generation, BORON-NITROGEN BONDS, AMMONIA-BORANE, GAMMA-ALUMINA, AMINE-BORANE, COPPER(0) NANOPARTICLES, REUSABLE NANOCATALYST, HYDROGEN GENERATION, DEHYDROGENATION, EFFICIENT, AMINOBORANES

Abstract

Palladium(II) 2,4-pentanedionate, impregnated on alumina nanopowder, was reduced by dimethylamine borane (DMAB) forming Pd(0) nanoparticles (NPs) at room temperature. Pd(0) NPs could be isolated from solution and characterized by ATR-IR, UV-vis, XRD, SEM, TEM, XPS and BET. The results obtained from TEM images reveal the formation of palladium(0) nanoparticles on gamma-alumina, having a mean particle size of 7.1 +/- 2.6 nm. Alumina supported Pd(0) NPs with various metal loadings were employed as catalyst in dehydrogenation of DMAB at room temperature and the sample with 5.0% wt. Pd provides the highest turnover frequency (TOF = 73 h(-1)) at 25.0 +/- 0.5 degrees C. Kinetics of the catalytic dehydrogenation was also investigated depending on Pd concentration and temperature to determine the kinetic parameters of the H-2 release reaction.