Low platinum alloy catalyst PtCo3 obtaining high catalytic activity and stability with great water and CO2 resistance for catalytic oxidation of toluene

Review and Perspectives of Enhancement in the Catalytic Stability for the Complete Combustion of CO, CH4, and Volatile Organic Compounds

“…The impurities in the industrial exhaust have a great effect on the lifetime of the catalysts. Due to the complexity of the actual industrial emissions, the influence of impurities on the catalytic performance should be taken into consideration. , Generally, the catalytic deactivation due to the presence of impurities might be associated with the adsorption of impurities on the active sites. Sometimes, however, the presence of impurities (e.g., water vapor) might enhance the catalytic performance.…”

Capture‐bonding Super Assembly of Nanoscale Dispersed Bimetal on Uniform CeO2 Nanorod for the Toluene Oxidation

“…By calculating the peak areas of different valence states of Pt in XPS, it is concluded that the atomic ratio of Pt 0 /(Pt 0 +Pt 2+ ) in 6.2% PtFe 3 −C and 5.8% PtFe 3 −CeO 2 are 91% and 93%, respectively (Table 1), It can be seen that there is no significant difference for them, but the Pt content of the former is higher, so in general, the Pt 0 content of 6.2% PtFe 3 −C is relatively higher. By comparing the XPS spectra before and after the reaction, it is found that there is no obvious change in the binding energy and valence state for 5.8% PtFe 3 −CeO 2 [33] . The XPS results of O in as‐synthesized 6.2% PtFe 3 −C are shown in Figure 7c.…”

“…as shown in Figure 6c and 6 f, the lattice spacing of PtFe 3 (111) is 0.22 nm and 0.21 nm in 5.8% PtFe 3 −CeO 2 and 6.2% PtFe 3 −C, respectively, with a slight decrease compared to Pt monomer (111), indicating that the addition of Fe collapses the Pt lattice and reduces the lattice spacing. This suggests the formation of an PtFe 3 alloy [9a,21,23] . In Figure 6d, the transparent gray area represents the carbon black, while the black particles represent the PtFe 3 NPs.…”

“…In addition, the actual environment containing water, which will be adsorbed on the surface of the catalyst, leads to the poisoning of active sites, thus affecting the catalytic performance of toluene oxidation. [21] Therefore, when 5 vol.% and 10 vol.% water vapor are introduced to the gas, 5.8% PtFe 3 À CeO 2 and 6.2% PtFe 3 À C are selected to evaluate the water resistant performance. As shown in Figure 4, the 10 vol.% water vapor in the flowing gas possesses a more significant inhibition effect on the toluene catalytic oxidation than the 5 vol.%.…”

“…By comparing the XPS spectra before and after the reaction, it is found that there is no obvious change in the binding energy and valence state for 5.8% PtFe 3 À CeO 2 . [33] The XPS results of O in as-synthesized 6.2% PtFe 3 À C are shown in Figure 7c. The peaks at 531.99 and 533.35 eV (before) are different surface active oxygen species (O sur ), for 6.2% PtFe 3 À C, its surface also only contains O sur while without the lattice oxygen (O lat ).…”