am9b17713_si_001.pdf (926.46 kB)
Graphene Supported MoS2 Structures with High Defect Density for an Efficient HER Electrocatalysts
journal contribution
posted on 2020-03-09, 17:35 authored by Jarin Joyner, Eliezer F. Oliveira, Hisato Yamaguchi, Keiko Kato, Soumya Vinod, Douglas S. Galvao, Devashish Salpekar, Soumyabrata Roy, Ulises Martinez, Chandra S. Tiwary, Sehmus Ozden, Pulickel M. AjayanThe
development of novel efficient and robust electrocatalysts with sufficient
active sites is one of the key parameters for hydrogen evolution reactions
(HER) catalysis, which plays a key role in hydrogen production for
clean energy harvesting. Recently, two-dimensional (2D) materials,
especially those based upon transition metal dichalcogenides such
as molybdenum disulfide (MoS2), have gained attention for
the catalysis of hydrogen production because of their exceptional
properties. Innovative strategies have been developed to engineer
these material systems for improvements in their catalytic activity.
Toward this aim, the facile growth of MoS2 clusters by
sulfurization of molybdenum dioxide (MoO2) particles supported
on reduced graphene oxide (rGO) foams using the chemical vapor deposition
(CVD) method is reported. This approach created various morphologies
of MoS2 with large edges and defect densities on the basal
plane of rGO supported MoS2 structures, which are considered
as active sites for HER catalysis. In addition, MoS2 nanostructures
on the surface of the porous rGO network show robust physical interactions,
such as van der Waals and π–π interactions between
MoS2 and rGO. These features result in an improved process
to yield a suitable HER catalyst. In order to gain a better understanding
of the improvement of this MoS2-based HER catalyst, fully
atomistic molecular dynamics (MD) simulations of different defect
geometries were also performed.
History
Usage metrics
Categories
- Biophysics
- Biochemistry
- Physical Sciences not elsewhere classified
- Biotechnology
- Evolutionary Biology
- Environmental Sciences not elsewhere classified
- Chemical Sciences not elsewhere classified
- Ecology
- Biological Sciences not elsewhere classified
- Information Systems not elsewhere classified
- Developmental Biology
Keywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC