TiO2-coated CeCoOx-PVP catalysts derived from Prussian blue analogue for synergistic elimination of NOx and o-DCB: The coupling of redox and acidity

How Does Zinc Species Affect the Performance of CeO2–TiO2 Catalysts for Selective Catalytic Reduction of NO with NH3? A Comparative Laboratory Experiment

“…Figure c displayed the O 1s fitted XPS spectra of the fresh and poisoned CT catalysts, and these results were subjected to peak fitting into three distinct peaks: lattice oxygen (O α : 528.5–530.0 eV), chemisorbed oxygen (O β : 530.1–532.1 eV), and surface oxygen species (O γ : 532.4–532.9 eV) . Notably, chemisorbed oxygen O β exhibited greater mobility and played a crucial role in NO to NO 2 conversion and Ce redox cycling, thereby facilitating the SCR reaction . The percentage of chemisorbed oxygen O β was calculated by determining the peak areas indicated in Figure c, and the rate of O β for the fresh and poisoned CT catalysts was ranked as follows: CT (59.6%) > CT-ZS(1.0) (31.8%) > CT-ZO(1.0) (26.5%) > CT-ZC(1.0) (23.6%).…”

“…31 Notably, chemisorbed oxygen O β exhibited greater mobility and played a crucial role in NO to NO 2 conversion and Ce redox cycling, thereby facilitating the SCR reaction. 32 The percentage of chemisorbed oxygen O β was calculated by determining the peak areas indicated in Figure 4c, and the rate of O β for the fresh and poisoned CT catalysts was ranked as follows: CT (59.6%) > CT-ZS(1.0) (31.8%) > CT-ZO(1.0) (26.5%) > CT-ZC(1.0) (23.6%). After all three Zn species are introduced, a decrease in the percentage of O β on catalysts can be found, with the most significant decrease observed in ZnCl 2 -poisoned catalysts, consistent with the trend of reduced SCR activity.…”

Engineering a CoMnOx nanocube core catalyst through epitaxial growth of CoAlOx hydrotalcite shell nanosheets for efficient elimination of propane

“…The Prussian blue analogue (PBA), as a metal–organic skeleton (MOF), is generally constructed by bridging cyanide ligands and divalent or trivalent metal ions. 10 Common transition metals (Co, Mn, Ce, Ni, Fe, Cr, and Cu) are widely used in PBA structures, making the crystal structure and composition of PBA flexible and adjustable. The wide coexistence of divalent and trivalent metal ions in the structure of PBA and the controllable substitution process have resulted in the excellent electron mobility of PBAs.…”

“…The wide coexistence of divalent and trivalent metal ions in the structure of PBA and the controllable substitution process have resulted in the excellent electron mobility of PBAs. 10–13 Zheng et al prepared a CoCe PBA-derived CeO 2 /Co 3 O 4 catalyst for the catalytic oxidation of acetone, which showed a significant increase in the specific surface area of the porous structure and enhancement in the redox properties. 13 Co and Mn are often used as active components in the catalytic combustion of VOCs.…”