Effect of the Support Nature on the Physicochemical Properties of Platinum Catalysts for Ammonia Oxidation Full article
| Journal |
Journal of Structural Chemistry
ISSN: 0022-4766 , E-ISSN: 1573-8779 |
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| Output data | Year: 2021, Volume: 62, Number: 4, Pages: 598-612 Pages count : 15 DOI: 10.1134/S0022476621040120 | ||
| Tags | neutralization of ammonia, platinum, selective oxidation, XPS, supported catalysts, TEM | ||
| Authors |
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| Affiliations |
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Funding (1)
| 1 |
Russian Science Foundation Helmholtz Association of German Research Centres |
18-43-06201/HRSF-0046 |
Abstract:
Platinum catalysts prepared by incipient wetness impregnation of different supports (TiO2, WO3/TiO2, CeO2, Al2O3, zeolite ZSM-5) are tested in the ammonia oxidation reaction (TPR–NН3+О2) and characterized by a combination of physicochemical (powder XRD, TEM, XPS) and kinetic (TPR–H2, TPD–NH3) techniques. On the surface of all catalysts, platinum is present in the highly dispersed form (average particle size <1.5 nm), providing the activity for ammonia oxidation above 150 °C. In the temperature range 150-250 °C, the main oxidation products are nitrous oxide and molecular nitrogen whereas NOx oxides start to form at T > 250 °C. The highest catalytic activity is observed when platinum is supported on TiO2 promoted with tungsten. The introduction of tungsten modifies the acidity of the surface and affects the redox properties of platinum catalysts. The role of the support is found to be the stabilization of oxidized or reduced platinum forms on the surface, thus determining the total activity in the ammonia oxidation reaction.
Cite:
Svintsitskiy D.A.
, Slavinskaya E.M.
, Kibis L.S.
, Stadnichenko A.I.
, Fedorova E.A.
, Stonkus O.A.
, Korneeva E.V.
, Romanenko A.V.
, Boronin A.I.
Effect of the Support Nature on the Physicochemical Properties of Platinum Catalysts for Ammonia Oxidation
Journal of Structural Chemistry. 2021. V.62. N4. P.598-612. DOI: 10.1134/S0022476621040120 WOS Scopus РИНЦ AN OpenAlex
Effect of the Support Nature on the Physicochemical Properties of Platinum Catalysts for Ammonia Oxidation
Journal of Structural Chemistry. 2021. V.62. N4. P.598-612. DOI: 10.1134/S0022476621040120 WOS Scopus РИНЦ AN OpenAlex
Original:
Свинцицкий Д.А.
, Славинская Е.М.
, Кибис Л.С.
, Стадниченко А.И.
, Федорова Е.А.
, Стонкус О.А.
, Корнеева Е.В.
, Романенко А.В.
, Боронин А.И.
Влияние природы носителя на физико-химические свойства нанесенных платиновых катализаторов реакции окисления аммиака
Журнал структурной химии. 2021. Т.62. №4. С.639-654. DOI: 10.26902/jsc_id71157 РИНЦ OpenAlex
Влияние природы носителя на физико-химические свойства нанесенных платиновых катализаторов реакции окисления аммиака
Журнал структурной химии. 2021. Т.62. №4. С.639-654. DOI: 10.26902/jsc_id71157 РИНЦ OpenAlex
Dates:
| Submitted: | Oct 1, 2020 |
| Accepted: | Nov 10, 2020 |
| Published print: | Apr 1, 2021 |
| Published online: | Jun 8, 2021 |
Identifiers:
| Web of science: | WOS:000659206700012 |
| Scopus: | 2-s2.0-85107573748 |
| Elibrary: | 46847099 |
| Chemical Abstracts: | 2021:1277393 |
| OpenAlex: | W3169671858 |