Synthesis of rhodium-platinum bimetallic catalysts supported on SBA-15 by chemical fluid deposition for the hydrogenation of terephthalic acid in water

Facile fabrication of bimetallic Fe–Mg MOF for the synthesis of xanthenes and removal of heavy metal ions

“…This can be attributed to the high dispersion of Fe crystals on the outer cavities of Mg-MOF surface and inside the pores. 35,36 In addition, the observed simultaneous shis of the XRD patterns to lower and higher angles may be ascribed to the exibility and/or the breathing effect of Fe-MOF structure. [37][38][39] By increasing the ratio of Fe : Mg to 1 : 1, the Fe species aggregated on the surface of Mg-MOF which in role decreases the synergistic effect between the two metals and so the intensity of the diffraction peaks characteristic of both Fe and Mg is increased.…”

Monometallic and bimetallic Cu–Ag MOF/MCM-41 composites: structural characterization and catalytic activity

“…The synthesis of 1-amidoalkyl-2-naphthol reaction was carried out using 0.1 g of different MOFs (Cu-MOF/MCM-41, Ag-MOF/MCM-41, Cu-Ag MOF/ MCM-41 composites and Cu-Ag MOF) using 1.2 : 1.2 : 1.7 benzaldehyde : b-naphthol : benzamide molar ratio under solvent free condition at 130 C. The catalytic activity of the prepared bimetallic catalysts is increased compared with that of the monometallic catalyst which could be attributed to the presence of two different metals Cu and Ag and/or changing the active sites dispersion on the MOF surface in the bimetallic catalyst. 5,12,[84][85][86] The results in Fig. 10 and Table 2 illustrate that Cu-Ag MOF/MCM-41 composite is the best catalyst with respect to reaction times (10 min) and yields (92.86%) of the products.…”

Bimetallic Nanoparticles in Alternative Solvents for Catalytic Purposes

“…In particular, Tan et al prepared Rh-Pt NPs with an average size of~6.1 nm on mesoporous silica SBA-15 (Rh-Pt/SBA-15) by CFD under scCO 2 , which showed a high performance towards the hydrogenation of terephthalic acid in water (full conversion was achieved at 80 • C and 50 bar of H 2 in 4 h) (Scheme 12); clear cooperative effects were observed when compared to the corresponding parent monometallic catalysts (Rh/SBA-15 and Pt/SBA-15). The authors propose an enhanced absorption of arenes mediated by Pt on the active sites, whereas Rh plays a key role in the hydrogenation [133]. Other arenes such as bisphenol A, isophthalic acid, dimethyl phthalate, and benzoic acid were also efficiently reduced likewise.…”

“…Hydrogenation of terephthalic acid in water catalyzed by Rh-Pt BMNPs supported on mesoporous silica SBA-15[133].…”

“…Catalysts 2017,7, 207 24 of 34 at 80 °C and 50 bar of H2 in 4 h) (Scheme 12); clear cooperative effects were observed when compared to the corresponding parent monometallic catalysts (Rh/SBA-15 and Pt/SBA-15). The authors propose an enhanced absorption of arenes mediated by Pt on the active sites, whereas Rh plays a key role in the hydrogenation[133]. Other arenes such as bisphenol A, isophthalic acid, dimethyl phthalate, and benzoic acid were also efficiently reduced likewise.…”