High-performance graphite-supported ruthenium nanocatalyst for hydrogen evolution reaction


Sen B., Demirkan B., Savk A., Kartop R., Nas M. S. , Alma M. H. , ...More

JOURNAL OF MOLECULAR LIQUIDS, vol.268, pp.807-812, 2018 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 268
  • Publication Date: 2018
  • Doi Number: 10.1016/j.molliq.2018.07.117
  • Journal Name: JOURNAL OF MOLECULAR LIQUIDS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.807-812
  • Keywords: Dehydrocoupling, DMAB, Graphite, Hydrogen release, Ruthenium nanocatalyst, AMINE-BORANE ADDUCTS, DIMETHYLAMINE-BORANE, AMMONIA-BORANE, ROOM-TEMPERATURE, ALCOHOL OXIDATION, TRANSITION-METAL, HYDROLYTIC DEHYDROGENATION, CATALYZED DEHYDROGENATION, ACTIVE ELECTROCATALYSTS, REUSABLE CATALYST
  • Gazi University Affiliated: No

Abstract

The monodisperse graphite supported ruthenium (0) nanoparticles (Ru (0)/Graphite NPs) was obtained by using chemical reduction method and performed in the dehydrogenation reaction of dimethyl-amine borane (DMAB). The characterization of Ru (0)/Graphite NPs was characterized by Transmission Electron Microscopy (TEM), High-Resolution Transmission Electron Microscopy (HRTEM), X-Ray Photoelectron Spectroscopy (XPS), X-Ray Diffraction (XRD), and Raman Spectroscopy. After full characterization of Ru (0)@Graphite NPs, the prepared nanoparticles were performed for the catalytic dehydronation of dimethylamine borane and it has been found that Ru (0)/Graphite NPs is a highly active catalyst for this purpose. The initial TOF value was found to be 281.51 h(-1) at ambient conditions. Ru (0)/Graphite NPs were also tried for reusability and durability measurements and it was found that Ru (0)/Graphite NPs maintained their catalytic activities with the beginning performance of 79% during the dehydrogenation of DMAB. In addition, the detailed kinetic studies were investigated depending on the concentration of catalyst, temperature and etc. The results showed that the activation enthalpy (Delta H-#), entropy (Delta S-#) and energy (Ea) were found to be 11.33 kJ.mol(-1), -220.686 J mol(-1) K-1, and 13.82 kJ.mol(-1), respectively, for the dehydrogenation of DMAB. (C) 2018 Elsevier B.V. All rights reserved.