Type

Journal Article

Authors

Georg S Duesberg
Aidan R McDonald
Toby Hallam
Chanyoung Yim
Nina C Berner
Maria O'Brien
Niall Mcevoy
Hugo Nolan

Subjects

Chemistry

Topics
aqueous media noble metal catalysts evolution thin films pyrolytic carbon carbon electrodes processing techniques large scale physics

Molybdenum disulfide/pyrolytic carbon hybrid electrodes for scalable hydrogen evolution. (2014)

Abstract The electrochemical generation of hydrogen fuel via the proton reduction in the Hydrogen Evolution Reaction (HER) in aqueous media is currently dependent on the use expensive noble metal catalysts for which alternatives must be sought. Molybdenum disulfide (MoS2) has shown great promise as a suitable electrocatalyst in this regard. While many lab-scale experiments on the HER activity of this material have demonstrated its viability and explored some fundamental mechanistic features of HER at MoS2, these experimental techniques are often ill-suited to large scale production of such electrodes. In this study we present work on the fabrication of MoS2/pyrolytic carbon (PyC) electrodes via vapour phase sulfurization of Mo thin films. These hybrid electrodes combine the catalytic activity of MoS2 with the conductivity and stability of PyC, whilst using industrially compatible processing techniques. Structural defects in the sulfur lattice were found to be key catalytically active sites for HER and thinner MoS2 films displayed a higher quantity of these defects and, hence, an improved HER activity. The observed Tafel slope of 95 mV decade−1 is comparable to previous literature works on MoS2 HER performance.
Collections Ireland -> Trinity College Dublin -> Administrative Staff Authors (Scholarly Publications)
Ireland -> Trinity College Dublin -> Administrative Staff Authors

Full list of authors on original publication

Georg S Duesberg, Aidan R McDonald, Toby Hallam, Chanyoung Yim, Nina C Berner, Maria O'Brien, Niall Mcevoy, Hugo Nolan

Experts in our system

1
Georg Duesberg
Trinity College Dublin
Total Publications: 116
 
2
Aidan Mcdonald
Trinity College Dublin
Total Publications: 29
 
3
Toby Hallam
Trinity College Dublin
Total Publications: 20
 
4
Chanyoung Yim
Trinity College Dublin
Total Publications: 14
 
5
Nina C Berner
Trinity College Dublin
Total Publications: 20
 
6
Maria O'Brien
Trinity College Dublin
Total Publications: 7
 
7
Niall Mcevoy
Trinity College Dublin
Total Publications: 54
 
8
Hugo Nolan
Trinity College Dublin
Total Publications: 10