Synthesis of Bimetallic Nanocompositions AuxPd1-x/γ-Al2O3 for Catalytic CO Oxidation
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Журнал |
Journal of Nanoparticle Research
ISSN: 1388-0764
, E-ISSN: 1572-896X
|
| Вых. Данные |
Год: 2017,
Том: 19,
Номер: 11,
Номер статьи
: 367,
Страниц
: 9
DOI:
10.1007/s11051-017-4061-x
|
| Ключевые слова |
Gold, Nanoalloys, Nanoparticles, Nanostructured catalysts, Palladium |
| Авторы |
Zaytsev S.Yu.
1,2
,
Plyusnin P.E.
1,2
,
Slavinskaya E.M.
1,3
,
Shubin Yu.V.
1,2
|
| Организации |
| 1 |
Novosibirsk State University, Novosibirsk, Russian Federation
|
| 2 |
Nikolaev Institute of Inorganic Chemistry SB RAS, Novosibirsk, Russian Federation
|
| 3 |
Boreskov Institute of Catalysis SB RAS, Lavrentiev Av. 5, Novosibirsk, Russian Federation 630090
|
|
Информация о финансировании (1)
|
1
|
Российский научный фонд
|
16-13-10192
|
Colloidal suspensions of AuxPd1-x nanoalloys were prepared via hydrazine co-reduction of [AuCl4]− and [PdCl4]2− complex anions in aqueous solution. High molecular weight polymeric compounds polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), and cryptoionic surfactants (AF-6 and AF-12 neonols, Triton X-100) were used as surface capping agents. Nanoparticles prepared under different experimental conditions were immobilized on γ-Al2O3 supports. The removal of the capping agents from the surface of the active particles was achieved through calcination of samples in oxidative atmosphere (air, 500 °C). This pretreatment of the catalysts significantly enhances their performance. Powder XRD, TEM, and EDX were employed to characterize the structure, size, and composition of the AuxPd1-x/γ-Al2O3 catalysts. The immobilized particles consist of uniformly mixed alloys having multi-domain face-centered cubic structure with typical crystallite size of 3–6 nm. The activity of the prepared samples was examined with temperature-programmed CO oxidation reaction (TP-CO+O2). Triton X-100 surfactant is superior in a number of parameters. Among all AuxPd1-x/γ-Al2O3 catalysts tested, the one stabilized with Triton X-100 (0.4%Au-0.2%Pd@Triton X-100) was found to have the highest activity for conversion of CO into CO2.