Abstract
Cu/ZnO/CeO 2 nanocomposite was supported on metal organic framework (MOF-5) to enhance active sites dispersion and control the nanoparticles agglomeration during synthesis through strong metal-support interactions. The incorporation of MOF-5 alleviated the obstacle facing the commercial ternary Cu/ZnO/Al 2O 3 regarding low surface area due to nanoparticles agglomeration. In addition, Cu/ZnO/CeO 2@MOF-5 gave higher methanol selectivity than the commercial catalyst which can be accounted for by the interfacial sites generated between MOF-5 and Cu/ZnO which favour methanol synthesis over carbon monoxide through regulating the intermediates bonding energies. CeO 2 as support for Cu/ZnO nanoparticles was also compared with commercial support and showed to have led to smaller particle size and superior dispersion of Cu active sites as well. Cu/ZnO/CeO 2@MOF-5 resulted in methanol STY of 23.3 mg g cat h −1 and selectivity of 79% at mild reaction temperature (260 °C) and pressure (10 bar). Two different MOFs including cerium based MOF and ZIF-8 demonstrated inferior performance compared to MOF-5. Graphical Abstract: (Figure presented.)
Original language | English |
---|---|
Pages (from-to) | 3157-3173 |
Number of pages | 17 |
Journal | Catalysis Letters |
Volume | 154 |
Issue number | 7 |
DOIs | |
Publication status | Published - 8 Jan 2024 |
Keywords
- CO hydrogenation
- Cu-based catalyst
- Cu/ZnO/CeO
- Metal-support interaction
- Metal–organic framework (MOF)
- Methanol synthesis