Rhodium(0), Ruthenium(0) and Palladium(0) nanoparticles supported on carbon-coated iron: Magnetically isolable and reusable catalysts for hydrolytic dehydrogenation of ammonia borane


Akbayrak S., ÇAKMAK G., ÖZTÜRK T. , ÖZKAR S.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, vol.46, no.25, pp.13548-13560, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 46 Issue: 25
  • Publication Date: 2021
  • Doi Number: 10.1016/j.ijhydene.2020.02.023
  • Title of Journal : INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
  • Page Numbers: pp.13548-13560

Abstract

We report the synthesis of magnetically isolable ruthenium(0), rhodium(0), and palladium(0) nanoparticles, supported on carbon-coated magnetic iron particles, and their employment as catalysts in hydrolysis of ammonia borane. Carbon-coated iron (C-Fe) particles are obtained by co-processing of iron powders with methane in a radio frequency thermal plasma reactor. The impregnation of ruthenium(III), rhodium(III) and palladium(II) ions on the carbon-coated iron particles followed by aqueous solution of sodium borohydride leads to the formation of respective metal(0) nanoparticles supported on carbon coated iron, M-0/C-Fe NP (M 1/4 Ru, Rh, and Pd) at room temperature. M-0/C-Fe NPs are characterized using the ICP-OES, XPS, TEM, and EDX techniques and tested as catalysts for hydrolysis of ammonia borane at 298 K. The results reveal that Rh-0/C-Fe, Ru-0/C-Fe, Pd-0/C-Fe catalysts provide turnover frequency of 83, 93, and 29 min(-1), respectively, in this industrially important reaction. More importantly, these magnetically separable metal(0) nanoparticles show very high reusability with no noticeable activity loss in subsequent runs of hydrolysis evolving 3.0 equivalent H-2 per mole of ammonia borane. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.