Catalytic Properties of PdZn/ZnO in Formic Acid Decomposition for Hydrogen Production
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
Applied Catalysis A: General
ISSN: 0926-860X
, E-ISSN: 1873-3875
|
| Output data |
Year: 2018,
Volume: 561,
Pages: 96-103
Pages count
: 8
DOI:
10.1016/j.apcata.2018.05.025
|
| Tags |
Pd/ZnO catalyst Pt/ZnO catalyst PdZn alloy Formic acid decomposition Hydrogen |
| Authors |
Bulushev Dmitri A.
1
,
Zacharska Monika
2
,
Beloshapkin Sergey
3
,
Guo Yina
3
,
Yuranov Igor
4
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis, SB RAS, 630090 Novosibirsk, Russia
|
| 2 |
Chemical Sciences Department, University of Limerick, Limerick, Ireland
|
| 3 |
Bernal Institute, University of Limerick, Limerick, Ireland
|
| 4 |
Ecole Polytechnique Fédérale de Lausanne, Lausanne CH-1015, Switzerland
|
|
Funding (1)
|
1
|
Ministry of Science and Higher Education of the Russian Federation
|
ГЗ-2017-2020
|
This is one of the first reports, which is related to hydrogen production through formic acid decomposition over Pd/ZnO catalysts widely used for methanol steam-reforming. These catalysts have been investigated in comparison with Pt/ZnO and Pd/Al2O3 catalysts as well as ZnO support. HAADF/STEM, XRD, XPS and DRIFTS in situ studies of the systems were performed. The measured catalyst activity corresponds to the following order: Pd/Al2O3≥Pd/ZnO > Pt/ZnO > ZnO. Among the studied catalysts, Pd/ZnO showed the highest selectivity to hydrogen (up to 99.3%). This was assigned to the formation of a PdZn alloy during the reductive pre-treatment of the catalyst. An increase of the pre-treatment temperature from 573 to 773 K led to a significant increase of the mean PdZn (PtZn) nanoparticle size. However, the catalyst activity did not change, but the selectivity to hydrogen increased. These features closely remind the behavior of Pd/ZnO catalysts in methanol steam reforming implying that the mechanism of formic acid decomposition involves the same key steps and active sites.