Issue 44, 2018

Nanocatalysts for hydrogen production from borohydride hydrolysis: graphene-derived thin films with Ag- and Ni-based nanoparticles

Abstract

Generation of hydrogen is one of the greatest challenges nowadays, especially chemically obtaining from the simple, straightforward borohydride hydrolysis reaction. Herein we are interested in this reaction for producing hydrogen using various nanocatalysts which are derived from graphene (reduced graphene oxide, rGO) and combined with metal-based nanoparticles (Ag, Ni and Ni(OH)2). Overall, four promising catalysts were obtained using the liquid–liquid interfacial route in order to obtain highly homogeneous thin films. We highlight the novelty in employing thin films for the generation of hydrogen gas, in which the reaction kinetics was thoroughly elucidated, obeying first-order profiles. In fact, very high catalytic activity was observed using low amounts of nanocatalysts (∼0.1–0.8 mg), with the maximum rate of hydrogen production reaching nearly 33 × 103 mL−1 min−1 g−1. rGO/Ni nanocomposites are reported here for the first time, which also showed the most prominent activity. The isolated components alone were not efficient, evidencing the synergism in the nanocomposites produced. Finally, the nanocatalysts were recycled for up to 10 consecutive cycles, without losing activity. Various characterization techniques were performed during the reactions and after the reuse and confirmed that the typical nature of the composites remains intact.

Graphical abstract: Nanocatalysts for hydrogen production from borohydride hydrolysis: graphene-derived thin films with Ag- and Ni-based nanoparticles

Supplementary files

Article information

Article type
Paper
Submitted
18 Jun 2018
Accepted
31 Aga 2018
First published
03 Sep 2018

J. Mater. Chem. A, 2018,6, 22226-22233

Nanocatalysts for hydrogen production from borohydride hydrolysis: graphene-derived thin films with Ag- and Ni-based nanoparticles

L. Hostert, E. G. C. Neiva, A. J. G. Zarbin and E. S. Orth, J. Mater. Chem. A, 2018, 6, 22226 DOI: 10.1039/C8TA05834B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements