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- Title
Solvent-Free Synthesis of Nickel Nanoparticles as Catalysts for CO 2 Hydrogenation to Methane.
- Authors
Netskina, Olga V.; Dmitruk, Kirill A.; Paletsky, Alexander A.; Mukha, Svetlana A.; Pochtar, Alena A.; Bulavchenko, Olga A.; Prosvirin, Igor P.; Shmakov, Andrey G.; Ozerova, Anna M.; Veselovskaya, Janna V.; Mazina, Olga I.; Komova, Oxana V.
- Abstract
The solid-state combustion method was used to prepare nickel-based catalysts for CO2 hydrogenation from [Ni(C3H4N2)6](NO3)2 and [Ni(C3H4N2)6](ClO4)2. These complexes were synthesized by adding nickel nitrate and perchlorate to melted imidazole. The composition and structure of the obtained complexes was confirmed by ATR FTIR, powder XRD, and elemental analysis. The stages of thermal decomposition of the complexes and their kinetic parameters were established. It was found that incomplete gasification of more thermostable Ni(C3H4N2)6](ClO4)2 led to the formation of carbon, nitrogen, and chlorine impurities. According to powder XRD and XPS, the solid products of gasification of both complexes consist of NiO and Ni0 covered with nickel hydroxide and/or a carbonate layer. In the case of the sample prepared from [Ni(C3H4N2)6](ClO4)2, this layer was pronounced. Therefore, it limits the nickel reduction in the reaction medium of CO2 hydrogenation, even at 450 °C. The surface of the sample prepared from [Ni(C3H4N2)6](NO3)2 contains nickel oxide, which is easily reduced. So, the catalyst active phase is already formed at 250 °C in the presence of CO2 and efficiently catalyzes CO2 hydrogenation as the temperature increases. Therefore, [Ni(C3H4N2)6](NO3)2 is a promising precursor for the CO2 hydrogenation catalyst, and its solvent-free synthesis follows Green Chemistry principles.
- Subjects
NICKEL catalysts; CARBON dioxide; HYDROGENATION; NICKEL oxide; SUSTAINABLE chemistry; NICKEL oxides
- Publication
Catalysts (2073-4344), 2022, Vol 12, Issue 10, p1274
- ISSN
2073-4344
- Publication type
Article
- DOI
10.3390/catal12101274