SUPPLEMENTARY MATERIAL : FIGURE S1: Individual elemental maps of 7Cu/3Zn/AlFum MOF. (a) Al K 1; (b) Cu K 1; and (c) Zn K 1; FIGURE S2: Individual elemental maps of 15Cu/6.4Zn/AlFum MOF. (a) Al K 1; (b) Cu K 1; and (c) Zn K 1; FIGURE S3: Derivative TGA plot of AlFum MOF. FIGURE S4: Derivative TGA plot of 7Cu/3ZnO/AlFum MOF; FIGURE S5: Derivative TGA plot of 15Cu/6.4ZnO/AlFum MOF.Green methanol is a viable alternative for the storage of hydrogen and may be produced
from captured anthropogenic sources of carbon dioxide. The latter was hydrogenated over Cu-ZnO
catalysts supported on an aluminum fumarate metal-organic framework (AlFum MOF). The catalysts,
prepared via slurry phase impregnation, were assessed for thermocatalytic hydrogenation of CO2 to
methanol. PXRD, FTIR, and SBET exhibited a decrease in crystallinity of the AlFum MOF support
after impregnation with Cu-Zn active sites. SEM, SEM-EDS, and TEM revealed that the morphology
of the support is preserved after metal loading, where H2-TPR confirmed the presence of active
sites for hydrogen uptake. The catalysts exhibited good activity, with a doubling in Cu and Zn
loading over the AlFum MOF, resulting in a 4-fold increase in CO2 conversions from 10.8% to 45.6%
and an increase in methanol productivity from 34.4 to 56.5 gMeOH/Kgcat/h. The catalysts exhibited
comparatively high CO selectivity and high yields of H2O, thereby favoring the reverse water-gas
shift reaction. The selectivity of the catalysts towards methanol was found to be 12.9% and 6.9%. The
performance of the catalyst supported on AlFum MOF further highlights the potential use of MOFs
as supports in the heterogeneous thermocatalytic conversion of CO2 to value-added products.The Royal Society- Foreign, Commonwealth & Development Office (FCDO) Africa Capacity Building Initiative (ACBI) Programme, the Council for Scientific and Industrial Research (CSIR), the South African Department of Science and Innovation (DSI) for research activities under HySA Infrastructure and the South Africa—France PROTEA Programme..https://www.mdpi.com/journal/catalystsam2023Chemistr
