Catalytic properties of CexZr1–xO2 prepared using a template in the oxidation of CO Full article
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Russian Journal of Physical Chemistry A
ISSN: 0036-0244 , E-ISSN: 1531-863X |
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| Output data | Year: 2016, Volume: 90, Number: 11, Pages: 2157-2164 Pages count : 8 DOI: 10.1134/S0036024416110108 | ||||
| Tags | cerium-zirconium oxides; cetyltrimethylammonium bromide; CO oxidation; sawdust; template | ||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Russian Science Foundation | 14-33-00018 |
Abstract:
The catalytic activity in CO oxidation of CexZr1–xO2 double oxides prepared using pine sawdust and cetyltrimethylammonium bromide (CTAB) as templates is compared. It is found by means of SEM and the low-temperature adsorption of N2 that biomorphic oxides reproduce the macropore structure of the template. It is shown via XRD and Raman spectroscopy that all samples contained mixed ceria-zirconia oxide. The double oxides form a cubic phase with a lattice of the fluorite type at a ratio of Ce: Zr = 4, regardless of the nature of the template; when Ce: Zr = 1, the biomorphic mixed oxide forms a tetragonal phase. According to Raman spectroscopy and XRD it was shown that the distortion of the oxygen sublattice is higher in biomorphic samples. Energy dispersive analysis shows that Ca impurities were present in the biomorphic samples, introducing additional distortions in the lattice of double oxide and leading to the formation of anionic vacancies. It is found that when Ce: Zr = 4, the conversion of CO on biomorphic oxide in the range of 100–350°C is higher than that observed for CexZr1–xO2 (CTAB); reducing the Ce: Zr ratio in the biomorphic sample to 1 results in a marked decrease in CO conversion at 100–200°C. It is concluded that these differences are due to changes in the mobility of the lattice oxygen. © 2016, Pleiades Publishing, Ltd.
Cite:
Kaplin I.Y.
, Lokteva E.S.
, Golubina E.V.
, Maslakov K.I.
, Chernyak S.A.
, Levanov A.V.
, Strokova N.E.
, Lunin V.V.
Catalytic properties of CexZr1–xO2 prepared using a template in the oxidation of CO
Russian Journal of Physical Chemistry A. 2016. V.90. N11. P.2157-2164. DOI: 10.1134/S0036024416110108 WOS Scopus РИНЦ OpenAlex
Catalytic properties of CexZr1–xO2 prepared using a template in the oxidation of CO
Russian Journal of Physical Chemistry A. 2016. V.90. N11. P.2157-2164. DOI: 10.1134/S0036024416110108 WOS Scopus РИНЦ OpenAlex
Original:
Каплин И.Ю.
, Локтева Е.С.
, Голубина Е.В.
, Маслаков К.И.
, Черняк С.А.
, Леванов А.В.
, Строкова Н.Е.
, Лунин В.В.
Каталитические свойства CexZr1 – xO2, полученного темплатным методом, в окислении CO
Журнал физической химии. 2016. Т.90. №11. С.1634-1642. DOI: 10.7868/S0044453716110108 РИНЦ OpenAlex
Каталитические свойства CexZr1 – xO2, полученного темплатным методом, в окислении CO
Журнал физической химии. 2016. Т.90. №11. С.1634-1642. DOI: 10.7868/S0044453716110108 РИНЦ OpenAlex
Dates:
| Published online: | Oct 19, 2016 |
| Published print: | Nov 1, 2016 |
Identifiers:
| Web of science: | WOS:000386555300006 |
| Scopus: | 2-s2.0-84991641385 |
| Elibrary: | 27577098 |
| OpenAlex: | W2536551161 |