Characterization of bifunctional PtSn/H[Al]ZSM5 catalysts: a comparison between two impregnation strategies

Tin-Assisted Fully Exposed Platinum Clusters Stabilized on Defect-Rich Graphene for Dehydrogenation Reaction

“…As shown in Figure S7A and Table S2, Pt is completely in metallic state in Pt3Sn/Al2O3 sample after reduction since the peak centered around 71.1eV (Pt 4f7/2) corresponds to Pt. [26][27] For a-PtSn/ND@G, the peak of Pt shows an upward shift trend in the binding energy (BE) compared to that of Pt3Sn/Al2O3 The catalytic performance of a-PtSn/ND@G and Pt3Sn/Al2O3 for DDH of n-butane was evaluated under atmospheric pressure at 450 o C. As shown in Figure 3A and Table S3, the initial conversion of the Pt3Sn/Al2O3 catalyst seriously decline from 14.1% to 6.3%, and the selectivity of total DDH products (TDP include n-butene, 1,…”

Hydrothermal study of Pt–Sn-based SAPO-34 supported novel catalyst used for selective propane dehydrogenation to propylene

“…And fundamental reason for the new Pt 4f 7/2 signal at lowers binding energies (71.8 eV). According to the charge density admission effect, if a displacement of the platinum signal occurs at lower binding energies due to the formation of the Pt-Sn alloy, a similar effect should also take place but in the opposite direction for tin signal of the Pt-Sn alloy [54,55]. Fig.…”

“…XRD patterns of the Pt-Sn/SAPO-34 supported catalysts (before and after hydrothermal treatment at steam rate 2 ml/h). discourage the Pt-Sn alloy formation in the presence of support interaction [11,55]. Moreover, Pt-Sn alloy is not active during alkane dehydrogenation [11,55].…”

“…discourage the Pt-Sn alloy formation in the presence of support interaction [11,55]. Moreover, Pt-Sn alloy is not active during alkane dehydrogenation [11,55]. The intensity of hydrothermal treatment largely reduce the Sn(0)/Pt ratio to 0.45, that means hydrothermal treatment increases chances of Pt-Sn alloy formation, but in actual ionic Sn decreased due to the increase in SnO x .…”

Effect of microwave calcination on catalytic properties of Pt/MgAl(Sn)Ox catalyst in cyclohexane dehydrogenation to cyclohexene

“…Since the strongest peak Pt 4f coincided with Al 2p peak of the MASO support, only the peaks characteristic for the Sn 3d region were used in this work. Generally, zerovalent tin, alloyed tin, oxidized tin and chlorinated tin contributed to the X-ray photoelectron spectroscopy of Sn 3d5/2 peak [37]. From the deconvolution of the spectra (Fig.…”