Next Article in Journal
Chemical Preparation of Supported Bimetallic Catalysts. Gold-Based Bimetallic, a Case Study
Next Article in Special Issue
Nanocarbons with Different Dimensions as Noble-Metal-Free Co-Catalysts for Photocatalysts
Previous Article in Journal
The Reaction Mechanism of Acetaldehyde Ammoximation to Its Oxime in the TS-1/H2O2 System
Previous Article in Special Issue
Facile Synthesis of Vanadium Oxide/Reduced Graphene Oxide Composite Catalysts for Enhanced Hydroxylation of Benzene to Phenol
Article Menu

Export Article

Open AccessArticle
Catalysts 2016, 6(7), 108; doi:10.3390/catal6070108

An Oxygen Reduction Study of Graphene-Based Nanomaterials of Different Origin

1
Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia
2
Institute of Physics, University of Tartu, W. Ostwald Str. 1, 50411 Tartu, Estonia
3
Institute of Chemistry, UFMS, CP 549, Campo Grande MS 79070-900, Brazil
*
Author to whom correspondence should be addressed.
Academic Editor: Frédéric Jaouen
Received: 13 June 2016 / Revised: 8 July 2016 / Accepted: 12 July 2016 / Published: 22 July 2016
(This article belongs to the Special Issue Carbon Materials for Green Catalysis)
View Full-Text   |   Download PDF [6136 KB, uploaded 22 July 2016]   |  

Abstract

The aim of this study is to compare the electrochemical behaviour of graphene-based materials of different origin, e.g., commercially available graphene nanosheets from two producers and reduced graphene oxide (rGO) towards the oxygen reduction reaction (ORR) using linear sweep voltammetry, rotating disc electrode and rotating ring-disc electrode methods. We also investigate the effect of catalyst ink preparation using two different solvents (2-propanol containing OH ionomer or N,N-dimethylformamide) on the ORR. The graphene-based materials are characterised by scanning electron microscopy, transmission electron microscopy, Raman spectroscopy and X-ray photoelectron spectroscopy. Clearly, the catalytic effect depends on the origin of graphene material and, interestingly, the electrocatalytic activity of the catalyst material for ORR is lower when using the OH ionomer in electrode modification. The graphene electrodes fabricated with commercial graphene show better ORR performance than rGO in alkaline solution. View Full-Text
Keywords: graphene; reduced graphene oxide; oxygen reduction; electrocatalysis; fuel cells graphene; reduced graphene oxide; oxygen reduction; electrocatalysis; fuel cells
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Supplementary material

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Lilloja, J.; Kibena-Põldsepp, E.; Merisalu, M.; Rauwel, P.; Matisen, L.; Niilisk, A.; Cardoso, E.S.F.; Maia, G.; Sammelselg, V.; Tammeveski, K. An Oxygen Reduction Study of Graphene-Based Nanomaterials of Different Origin. Catalysts 2016, 6, 108.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Catalysts EISSN 2073-4344 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top