Enhanced catalytic performance by oxygen vacancy and active interface originated from facile reduction of OMS-2

Selective Oxidation of Biomass-Derived Alcohols and Aromatic and Aliphatic Alcohols to Aldehydes with O2/Air Using a RuO2-Supported Mn3O4 Catalyst

“…58 The average oxidation state of Mn in RuO 2 (3%)/Mn 3 O 4 was calculated to be 2.68 that matched well with the average oxidation state of Mn in Mn 3 O 4 . 59 Two well-resolved doublets centered at 653.53 and 641.81 eV corresponding to Mn 2p 1/2 and Mn 2p 3/2 , respectively, were observed in the high-resolution XPS spectrum of Mn 2p, confirming the presence of Mn 2+ and Mn 3+ species in Mn 3 O 4 (Figure 6f). 60 The spin–orbit splitting value (Δ E ) between the two doublets was 11.74 eV that matched well with the reported value of Mn 3 O 4 .…”

Elucidating structure-performance correlations in gas-phase selective ethanol oxidation and CO oxidation over metal-doped γ-MnO2

“…The Mn 2p3/2 spectra can be deconvoluted into four peaks locating at ca. 640.3, 641.6, 642.9 and 644.3 eV, which can be ascribed to Mn 2+ , Mn 3+ , Mn 4+ and a satellite, respectively [24,39,40]. Due to the partial decomposition of MnO2 to Mn2O3 and Mn3O4 upon calcination at 300 °C, the fraction of Mn 2+ species (Mn 2+ /Mn ratio) in the fresh samples reached about 10%.…”

Toluene Conversion by Using Different Morphology MnO2 Catalyst

“…From the result of Table 2, we could see that the proportion of Olatt followed the order of nanotube ＞ nanowire ＞ nanocube ＞ nanoflower, which was agreement with the toluene conversion efficiency. Researches indicated that the surface adsorbed oxygen played a decisive role in the degradation of VOCs (Du et al, 2018;Sun et al, 2018), due to its better mobility than the lattice oxygen. While the Mn 4+ on surface of catalyst might result in the charge imbalance, could produce a large amount of adsorbed oxygen species and unsaturated chemical bonds on the…”