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CO 2 Hydrogenation over Fe-Co Bimetallic Catalyst Derived from the Thermolysis of [Co(NH 3) 6 ][Fe(CN) 6 ].
- Source :
- Catalysts (2073-4344); Dec2023, Vol. 13 Issue 12, p1475, 19p
- Publication Year :
- 2023
-
Abstract
- Reducing the amount of CO<subscript>2</subscript> in the atmosphere is a very important task. Therefore, the development and search for new approaches to the synthesis of catalytic systems, allowing for the catalytic conversion of CO<subscript>2</subscript> into valuable products, is an urgent task. In this work, the catalyst was obtained by the thermolysis of a double complex compound. In this regard, kinetic studies of the parameters of the thermolysis process of double complex salts-[Co(NH)<subscript>3</subscript>]<subscript>6</subscript>][Fe(CN)<subscript>6</subscript>] were additionally determined using isoconversion and model approaches of non-isothermal kinetics. The catalyst was studied using various physicochemical methods—X-ray diffraction (XRD), infrared (IR)-spectroscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). It was shown that, at the stage of catalyst preparation, the formation of a CoFe alloy occurred, while the surface mainly consisted of carbon in sp<subscript>2</subscript>-hybridization, and the metals existed in the form of spinel CoFe<subscript>2</subscript>O<subscript>4</subscript>. It was shown that catalysts based on bimetallic salts were active in the process of hydrogenation of carbon dioxide without a pre-activation stage (CO<subscript>2</subscript> conversion reached 28%, with a specific activity of 4.0 µmolCO<subscript>2</subscript>/gMe·s). It was established that it was possible to change the selectivity of the carbon dioxide hydrogenation process by pre-treating the catalyst with hydrogen (selectivity for methane formation in the presence of an unreduced catalyst is 46.4–68.0%, whereas in the presence of a reduced catalyst it is 5.1–16.5%). [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20734344
- Volume :
- 13
- Issue :
- 12
- Database :
- Complementary Index
- Journal :
- Catalysts (2073-4344)
- Publication Type :
- Academic Journal
- Accession number :
- 174401951
- Full Text :
- https://doi.org/10.3390/catal13121475