Engineering CuZnOAl<sub>2</sub>O<sub>3</sub> Catalyst for Enhancing CO<sub>2</sub> Hydrogenation to Methanol
The CuZnOAl<sub>2</sub>O<sub>3</sub> catalyst shows excellent activity and selectivity in the reaction of CO<sub>2</sub> hydrogenation to methanol as a consequence of its controllable physicochemical properties, which is expected to offer an efficient route to ren...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-03-01
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| Series: | Molecules |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1420-3049/30/6/1350 |
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| Summary: | The CuZnOAl<sub>2</sub>O<sub>3</sub> catalyst shows excellent activity and selectivity in the reaction of CO<sub>2</sub> hydrogenation to methanol as a consequence of its controllable physicochemical properties, which is expected to offer an efficient route to renewable energy. In this study, CuZnOAl<sub>2</sub>O<sub>3</sub> catalysts are engineered by a special pretreatment, constructing a carbonate structure on the surface of the catalyst. Compared to the unmodified catalyst, the optimized catalyst (CZA-H-C1) not only exhibits an improved methanol selectivity of 62.5% (250 °C and 3 MPa) but also retains a minimal degree of deactivation of 9.57% over a 100 h period. By characterizing the catalysts with XRD, TEM, XPS and in situ DRIFTS spectroscopy, it was found that the surface carbonate species on Cu-based catalysts could significantly enhance the reaction and shield the active sites. This study offers theoretical insights and practical strategies for the rational design and optimization of high-performance heterogeneous catalysts. |
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| ISSN: | 1420-3049 |