Cerium(III) Nitrate Derived CeO2 Support Stabilising PtOx Active Species for Room Temperature CO Oxidation
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
ChemCatChem
ISSN: 1867-3880
, E-ISSN: 1867-3899
|
| Output data |
Year: 2020,
Volume: 12,
Number: 5,
Pages: 1413-1428
Pages count
: 16
DOI:
10.1002/cctc.201902146
|
| Tags |
catalysis; ceria; low-temperature CO oxidation; operando XAS; platinum(IV) nitrato complexes |
| Authors |
Vasilchenko Danila
1,2
,
Asanova Tatyana
1,2
,
Kolesov Boris
1,2
,
Tsygankova Alphiya
1,2
,
Stadnichenko Andrey
2,3
,
Slavinskaya Elena
2,3
,
Gerasimov Evgeny
2,3
,
Lomachenko Kirill
4
,
Boronin Andrey
2,3
,
Korenev Sergey
1,2
|
| Affiliations |
| 1 |
Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Science, Novosibirsk 630090 (Russian Federation)
|
| 2 |
Novosibirsk State University, Novosibirsk 630090 (Russian Federation)
|
| 3 |
Boreskov Institute of Catalysis, Novosibirsk 630090 (Russian Federation)
|
| 4 |
European Synchrotron Radiation Facility, Grenoble 38 000 (France)
|
|
Funding (1)
|
1
|
Russian Science Foundation
|
18-73-00054
|
A new approach for preparing a PtOx/CeO2 catalyst for low-temperature CO oxidation has been developed. The approach includes; i) preparation of a CeO2 support through the controllable thermal decomposition of Ce(NO3)(3) . 6H2O, and then ii) deposition of polynuclear platinum nitrato complexes ([H3O ⊂ 18-crown-6](2)[Pt-2(mu(2)-OH)(2)(NO3)(8)][Pt-4(mu(3)-OH)(2)(mu(2)-OH)(4)(NO3)(10)]) on the CeO2 support. The NO3--rich ceria support produced at the onset temperature of Ce(NO3)(3) -> CeO2 transformation (220 оC) yields the "PtOx/CeO2-220" catalyst that shows intriguingly high activity in CO oxidation, at room temperature and below. To understand the nature of the low-temperature catalytic activity, prepared catalysts have been studied using X-ray photoelectron spectroscopy (XPS), Raman and operando X-ray absorption fine structure spectroscopy (XAFS) and transmission electron microscopy (TEM).