Sn surface-enriched Pt–Sn bimetallic nanoparticles as a selective and stable catalyst for propane dehydrogenation

Effects of heat treatment atmosphere on the structure and activity of Pt3Sn nanoparticle electrocatalysts: a characterisation case study

“…Such mismatches between techniques were also found in other detailed characterization studies, 32,33 including our previous study, 21 where we calculated the alloying degree as the proportion of Sn present in the bimetallic particles compared to the nominal composition of a Pt 3 Sn alloy NP (3-4 nm) to be $90% from the lattice parameters according to Vegard's law, 34,35 but XPS and XANES spectra indicated at least 50% of Sn atoms are oxidized.…”

Synthesis and Characterization of the Optical Properties of Pt-TiO2Nanotubes

“…The formation mechanism for Pt-TNTs is similar to that reported in the literature [41]; that is, the AFHM and alkali solution under ambient atmosphere pressure will distort the octahedral crystal structure of [39]. During sintering of the Pt-TNTs at higher temperatures such as 650 ∘ C in the synthesis process, PtO + particles spread out over the Pt-TNTs surfaces and then formed agglomerated particles.…”

“…[38,39] after calcination at 550 ∘ C. As shown in Figure 1(a), with respect to Ti, the electron binding energies of Ti2p 3/2 and Ti2p 1/2 were located at 458.72 eV and 464.38 eV, respectively. The difference between the peaks of Ti2p 3/2 and Ti2p 1/2 with the electron binding energy of 5.66 eV indicated that Ti 4+ existed in the primary state.…”

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

“…2B. It can be observed that all the samples exhibited three peaks: the first peak at around 200-250 • C, the second at about 400-450 • C, and the highest temperature peak at 650-750 • C. Due to the similar reduction temperature regions of monometallic Pt and Sn catalysts, the first and the second hydrogen consumption peaks were attributed to the co-reduction of SnO 2 (PtO 2 ) to SnO x (PtO x ) and of SnO x (PtO x ) to Sn 0 (Pt 0 ), respectively [22]. In comparison with Fig.…”

“…Additionally, it is well established that the catalystic performances of PtSn bimetallic catalysts mainly depend on the corresponding preparation methods [10]. As shown by comparison with the catalytic properties of the catalysts prepared by various methods, the advantageous electronic effect of modifying tin is restricted to the PtSn bimetallic composition [21][22][23][24][25]. For example, separate stoichiometric metallic phases of Pt 3 Sn, PtSn and PtSn 2 being effectively controlled by selection of the starting inorganic complexes are studied by the conversions of hydrocarbons (cyclohexane, propane and isobutane), the catalytic properties are interpreted in terms of Sn/Pt ratio [26][27][28].…”