Nanometer-Sized MoS2 Clusters on Graphene Flakes for Catalytic Formic Acid Decomposition
Science article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
ACS Catalysis
ISSN: 2155-5435
|
| Output data |
Year: 2014,
Volume: 4,
Number: 11,
Pages: 3950-3956
Pages count
: 7
DOI:
10.1021/cs500943b
|
| Tags |
formic acid decomposition, graphene, hydrogen production, MoS2 clusters, structure |
| Authors |
Koroteev Victor O.
1,2
,
Bulushev Dmitri A.
3,4
,
Chuvilin Andrey L.
5,6
,
Okotrub Alexander V.
1,2
,
Bulusheva Lyubov G.
1,2
|
| Affiliations |
| 1 |
Nikolaev Institute of Inorganic Chemistry, SB RAS, 3 Acad. Lavrentiev ave., 630090 Novosibirsk, Russia
|
| 2 |
Novosibirsk State University, 2 Pirogov str., 630090 Novosibirsk, Russia
|
| 3 |
Chemical & Environmental Sciences Department, University of Limerick, Limerick, Ireland
|
| 4 |
Boreskov Institute of Catalysis, SB RAS, 5 Acad. Lavrentiev ave., 630090 Novosibirsk, Russia
|
| 5 |
CIC nanoGUNE Consolider, E-20018 San Sebastian, Spain
|
| 6 |
IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
|
|
Funding (3)
|
1
|
Science Foundation Ireland
|
06/CP/E007
|
|
2
|
European Commission
|
295180 FP7-PEOPLE-2011-IRSES
|
|
3
|
Russian Foundation for Basic Research
|
14-03-31633 (01201451880)
|
MoS2 was deposited on graphene flakes via decomposition of MoS3 in vacuum at different temperatures (500–800 °C). The materials obtained were tested for catalytic formic acid decomposition, giving mainly hydrogen and carbon dioxide. According to atom-resolved transmission electron microscopy study, a considerable amount of MoS2 clusters with a mean size of 1 nm was formed on the graphene surface at 500 °C. Simulation of the structure of a cluster revealed the presence of Mo-edge atoms. Raising the preparation temperature up to 800 °C led to agglomeration of MoS2 clusters and formation of thin crystalline MoS2 particles 20–30 nm in size. The sample enriched with the MoS2 clusters showed 6 times higher catalytic activity at 160 °C than the sample with the crystalline MoS2 particles. This demonstrates that the observed nanometer-sized MoS2 clusters are responsible for catalysi