Tuning oxygen vacancies on mesoporous ceria nanorods by metal doping: Controllable magnetic property

Abatement of Toluene Using a Sequential Adsorption-Catalytic Oxidation Process: Comparative Study of Potential Adsorbent/Catalytic Materials

“…The PSD shows a broad peak centered at 35 nm corresponding to the inter-particle spaces in the scaffold-like assembly of nanorods [28]. The BET surface area of 91 m 2 g −1 and Vp of 0.63 cm 3 g −1 are in accordance with previous results [29,30]. The N 2 sorption isotherm of activated UiO-66-SO 3 H is a somewhat mixed type I/IV, with a sharp increase of gas uptake at the low-pressure range and an observable hysteresis between adsorption and desorption branches in the high relative pressure (P/P 0 ) range of 0.73-1.0.…”

Direct oxidation esterification of methacrolein with methanol: Oxygen vacancy promotion of Zr‐doped Au/CeO2 nanorods

“…The six main peaks at about 1.44 × 10 −16 J (901.9 eV, U), 1.45 × 10 −16 J (907.9 eV, U 2 ), 1.47 × 10 −16 J (917.1 eV, U 3 ), 1.41 × 10 −16 J (882.7 eV, V), 1.42 × 10 −16 J (889.4 eV, V 2 ), and 1.44 × 10 −16 J (898.7 eV, V 3 ) are assigned to the presence of Ce 4+ . The other two peaks at 1.42 × 10 −16 J (885.0 eV, V 1 ) and 1.45 × 10 −16 J (903.5 eV, U 1 ) were assigned to Ce 3+ species, as shown by Xiao et al The content ratio of Ce 3+ was calculated from the peak area ratio between Ce 3+ and the total area with the results is presented in Table S1. The Au/CZ‐R presented the highest surface Ce 3+ concentration of ~ 27.7%, which means that this catalyst showed more oxygen vacancies than other catalysts, resulting from the charge transformation between Ce 3+ and Ce 4+ .…”

The dependence of high catalytic performance on the tunable oxygen vacancy in the CZxS/Zn‐HZSM‐5 bifunctional catalyst for alkylation of benzene and syngas

“…Compared to CeO 2 (2θ = 28.6°), the 2θ of 111 reflection of CZ x S was slightly shifted to higher angle, suchlike 29.83° for CZ 2 S, 29.95° for CZ 4 S and 29.99° for CZ 6 S showed in the enlarged view of Figure 1, which demonstrated the formations of a ceria–zirconia solid solution when Ce 4+ ions (0.097 nm) were replaced by smaller Zr 4+ ions (0.084 nm) that could lead to the shrinkage of lattice cell. [ 15,28 ]…”

“…Compared to CeO 2 (2θ = 28.6 ), the 2θ of 111 reflection of CZ x S was slightly shifted to higher angle, suchlike 29.83 for CZ 2 S, 29.95 for CZ 4 S and 29.99 for CZ 6 S showed in the enlarged view of Figure 1, which demonstrated the formations of a ceria-zirconia solid solution when Ce 4+ ions (0.097 nm) were replaced by smaller Zr 4+ ions (0.084 nm) that could lead to the shrinkage of lattice cell. [15,28] To analyze the distribution of Zr species on the CZ x S samples, the field emission scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) were carried out on a representative CZ 4 S sample. Figure 2 depicted the results of these experiments.…”

“…Cerium oxide (CeO 2 ) has been widely researched as a suitable catalyst for the methanol synthesis from syngas due to its abundant oxygen vacancies and abundant oxygen storage capacity. [15][16][17] The oxygen vacancy on the surface of CeO 2 has been regarded as the site for CO activation, and the concentration of oxygen vacancy can be further modulated by introducing of different metal ion, especially for zirconium (Zr) ion. Rana et al [18] inserted Zr into the lattice of ceria to increase the oxygen storage capacity, which subsequently enhanced the oxygen supply for the reaction.…”