Tailoring the electronic states of Pt by atomic layer deposition of Al2O3 for enhanced CO oxidation performance: Experimental and theoretical investigations

Critical role of NiO support morphology for high activity of Au/NiO nanocatalysts in CO oxidation

“…Carbon monoxide oxidation is a crucial catalytic reaction for air pollution control and is relevant in various chemical processes, including the removal of CO in car exhaust streams 1 and the elimination of poisonous CO from synthesis gas streams for upgrading hydrogen gas used as fuel for low-temperature fuel cells. 2 , 3 Heterogeneous catalysis by gold has advanced immensely since the pioneering work of Haruta et al. 4 reporting astoundingly high activity in low-temperature CO oxidation of very small (<5 nm) Au nanoparticles (NPs) deposited on base metal oxides.…”

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

“…The Pt 4d spectra were divided into peaks, and the corresponding ratios of Pt valence states were obtained. As shown in Figure S12, the Pt 4d spectra were fitted to the surface metal state of Pt 0 4d 5/2 (BE = 312.5–312.3 eV); Pt 0 4d 7/2 (BE = 329.5–329.3 eV), the surface oxidation state of Pt 2+ 4d 5/2 (BE = 315.5–315.2 eV); Pt 2+ 4d 7/2 (BE = 332.3–332.0 eV), and the surface oxidation state of Pt 4+ 4d 5/2 (BE > 319.0 eV); Pt 4+ 4d 7/2 (BE > 335.8 eV). − As shown in Figure S12 and Table , for fresh catalysts, the surface Pt 0 content in Bi 3+ -free catalysts is slightly lower than that of Bi 3+ -doped catalysts. This is attributed to the fact that, on the one hand, the Bi 3+ -free catalysts have higher dispersion and more absolute Pt 0 content calculated from the higher Pt content on the surface (Table ).…”