Preferential CO oxidation in a H2-rich stream promoted by ReOx species attached to Pt metal particles

Abstract

Clusters of ReO(x) are formed and attached to Pt metal particles during H(2) reduction treatment on Pt-ReO(x)/SiO(2), and the synergy between Pt metal surface and neighboring ReO(x) clusters gives high catalytic performance in the preferential CO oxidation in the presence of H(2)O and CO(2) as more realistic reaction conditions at low reaction temperature.

Role of Re Species and Acid Cocatalyst on Ir-ReOx/SiO2in the C-O Hydrogenolysis of Biomass-Derived Substrates

“…The formation of ReOx clusters on the surface of metal particles has also been reported in other metal-Re bimetallic systems such as Pt-ReOx. [29,30] Catalytic Performance in the Hydrogenolysis of Various Substrates Using Ir-ReO x /SiO 2 Catalyst in Water and Alkane Solvents Activity tests as well as reduction of the catalysts were performed in a 190 mL stainless steel autoclave with an inserted glass vessel. The catalyst (25-100 mg), a spinner and the reaction solvent (n-heptane or water; typically 10 mL) were placed into the autoclave and heated at 473 K under 8 MPa H2 for 1 h for the reduction pretreatment.…”

Hydrodeoxygenation of Vicinal OH Groups over Heterogeneous Rhenium Catalyst Promoted by Palladium and Ceria Support

“…The average valence of Re was determined by the whiteline area of Re L 3 -edge XANES ( Figures S6 and S7) on the basis of previous reports. [34,35] As a result, the average valence of the Re species on calcined and reduced ReO x -Pd/CeO 2 was determined to be 7.0 and 3.7, respectively. Table 3 and Table S5 list the curve-fitting results of EXAFS (the spectra are shown in Figures S8 and S9).…”

Selective Hydrogenolysis of C–O Bonds Using the Interaction of the Catalyst Surface and OH Groups

“…Here, the MoO x species on the Rh metal surface is isolated monomer, the ReO x species on the Rh metal surface is a two-dimensional cluster, and the ReO x species on Ir metal surface is a three-dimensional cluster. The structure of ReO x species on Pt metal particles has also been reported [55,56]. Later, the relation between the structure of oxides on metal surfaces and the selectivity in the hydrogenolysis reactions is discussed.…”