Insight into the effect of manganese substitution on mesoporous hollow spinel cobalt oxides for catalytic oxidation of toluene

Promoting effect of Ru-doped Mn/TiO2 catalysts for catalytic oxidation of chlorobenzene

“…5(a) and (b)) revealed that the lattice spacing of the catalysts was 0.35 nm, which was close to that of the anatase (101) crystal planes of TiO 2 . 26 For the Mn/TiO 2 catalyst, the highly-ordered and well-defined lattice fringes of 0.24 nm and 0.31 nm were assigned to the (101) plane and (111) plane of MnO 2 , respectively, 27,28 which confirmed the presence of MnO 2 . As for the Ru–Mn/TiO 2 catalyst, except that the lattice fringes of 0.24 nm corresponding to the (101) facet of MnO 2 were clear, there were more amorphous and fuzzy areas.…”

Insight into the pH effect on the oxygen species and Mn chemical valence of Co–Mn catalysts for total toluene oxidation

“…All the Co-Mn-i (i = 2, 7, 12 and 14) samples display three H 2 consumption peaks. The first peaks (243-269 °C) belong to the transformation of MnO 2 → Mn 2 O 3 , 50,51 the second peaks are related to the superposition reduction of Mn 2 O 3 → Mn 3 O 4 and Co 3+ → Co 2+ , 4,8,23 while the high-temperature peak ranging from 371 °C to 482 °C corresponds to Co 2+ → Co 0 and Mn 3 O 4 → MnO. 23,52 Co-Mn-12 exhibits a reduction peak at the lowest temperature, illustrating its better reducibility.…”

Dopant-driven tuning of toluene oxidation and sulfur resistance at the B-site of LaCo1−xMxO3 (M = Fe, Cr, Cu) perovskites

“…The band at 1498 cm −1 is attributed to the CC stretching vibration of the toluene aromatic ring, 90,91 while the band at 2957 cm −1 is mainly due to the C-H stretching vibration in CH 3 of toluene. [92][93][94] The bands at 2356 and 2327 cm −1 are ascribed to CO 2 . 88,95 The bands1 at 1736 and 1699 cm −1 could be associated with a CO stretching vibration of aldehyde, esters or carboxylic species.…”

“…86 Moreover, the bands corresponding to the antisymmetric and symmetric telescopic vibration of COO − in the benzoate species are detected at 1580 and 1402 cm −1 , and the one at 1540 cm −1 is usually assigned to the antisymmetric vibration of the carboxylate group (COOH − ) in the benzoate species. 93,94,96,97 The bands at approximately 1460 and 1440 cm −1 are related to the stretching vibration of the -OH group in benzaldehyde. 98 As seen in Fig.…”