Szczegóły publikacji
Opis bibliograficzny
Examination of the influence of La promotion on Ni state in hydrotalcite-derived catalysts under $CO_{2}$ methanation reaction conditions: operando X-ray absorption and emission spectroscopy investigation / Dominik WIERZBICKI, Rafal Baran, Radosław DĘBEK, Monika MOTAK, Maria Elena Gálvez, Teresa GRZYBEK, Patrick Da Costa, Pieter Glatzel // Applied Catalysis. B, Environmental ; ISSN 0926-3373. — 2018 — vol. 232, s. 409–419. — Bibliogr. s. 419, Abstr.
Autorzy (8)
- AGHWierzbicki Dominik
- Baran Rafał
- AGHDębek Radosław T.
- AGHMotak Monika
- Galvez Maria Elena
- AGHGrzybek Teresa
- da Costa Patrick
- Glatzel Pieter
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 113192 |
|---|---|
| Data dodania do BaDAP | 2018-04-20 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.apcatb.2018.03.089 |
| Rok publikacji | 2018 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Applied Catalysis, B, Environmental |
Abstract
Hydrotalcite-derived Ni-containing and Ni-La promoted catalysts showed very high activity in CO2 methanation, which is an efficient way of carbon dioxide conversion into methane – a valuable product. The catalysts were obtained by co-precipitation method followed by thermal decomposition and characterized by elemental analysis, low temperature nitrogen sorption, XRD, H2-TPR, CO2-TPD and TEM. The obtained results confirmed the formation of periclase-like structure materials, with nickel present as NiO nanoparticles and suggested successful incorporation of lanthanum into the catalytic system. The addition of lanthanum changed the interaction between nickel and periclase matrix (H2-TPR) and changed the distribution of basic sites, especially medium strength ones (CO2-TPD). Moreover, the catalysts were studied by complementary HERFD-XANES and XES spectroscopy under model operando conditions. The results uncovered that the presence of lanthanum strongly influenced the chemical nature and oxidation state of nickel species and its crucial role in catalyst activity enhancement in CO2 methanation reaction.
