Hydrogen-Assisted 1,2-Dichloroethane Dechlorination Catalyzed by Pt–Sn/SiO2: Effect of the Pt/Sn Atomic Ratio

Effects of Tin on Product Distribution and Catalyst Stability in Hydrodechlorination of CCl4 over Pt-Sn/γ-Al2O3

“…For hydrodechlorination of chlorinated hydrocarbons over supported bimetallic catalysts, [20][21][22][23][24][25] the effects of second metal addition have been generally described in the same manner as that for dehydrogenation in terms of electronic or geometric effects. [1][2][3][4][5][6][7][8][9][10][11][12] Addition of inert tin (organic or inorganic) precursors to supported platinum catalysts reduces the total number of active sites and changes reducibility and the electronic state of platinum particles as shown in Table 1, Figure 1, and XANES analyses. These changes could affect catalytic stability and product distribution, as shown in Tables 2 and 3.…”

“…The nature of supported bimetals depends on the preparation methods including the sequence of metal loading, metal precursors, solvents, and the composition of two metals. [1][2][3][4][5][6][7][8][9][10][11][12] The positive effects of second metal addition to platinum catalyst have been generally explained in terms of electronic effects, geometric effects, or their combination through forming an alloy [2][3][10][11][12] or diluting platinum ensemble sites. 1,[4][5][6][7][8][9] Thus, electron transfer from tin to platinum leads to weakening of the bond strength between platinum and hydrocarbons, reduces the rate of coke formation, and affects thereby the selectivity and catalyst durability.…”

Unidirectional Electron Transfer on Bismuth-Doped Pt/YMn2O5 for Efficient CO Oxidation as Diesel Oxidation Catalysts

“… − Therefore, the effective ideas to enhance the low-temperature activity of DOCs are, first, to modify the electronic and spatial structure of Pt to improve the conversion efficiency of Pt active sites for pollutants. For instance, precious metals, , transition elements, , alkali metals, , oxygenophilic metals, , etc. have been taken to modulate the electronic structure of Pt, and polymers and single-atom Pt have been studied to increase the geometric dispersion of Pt; second, to construct multiple active centers for the rapid conversion of CO and HC, thus reducing the competitive reaction between pollutants and thus enhancing the overall low-temperature activity of DOCs.…”