In situ self-assembly encapsulation of CoFeOx nanoparticles in ordered mesoporous TiZrOx channels for enhanced catalytic combustion of o-dichlorobenzene

Fabrication of a multi-dimensional CoFeOx catalyst for the efficient catalytic oxidation elimination of o-dichlorobenzene

“…Generally speaking, Fe 2p is mainly divided into Fe 3+ , Fe 2+ and satellite peaks. 26,45 For 2D/1D CoO x / CoFeO x and 2D CoFeO x catalysts, the Fe 2p 3/2 and Fe 2p 1/2 binding energies are approximately 711.3 AE 0.2 eV and 725.1 AE 0.2 eV for Fe 2+ , and approximately 713.1 AE 0.2 eV and 725.2 AE 0.2 eV for Fe 3+ , respectively. In addition, the contents of Fe 3+ / Fe total on 2D/1D CoO x /CoFeO x and 2D CoFeO x catalysts are 41.25% and 38.42%, respectively.…”

“…40,41 The above result is conclusive evidence for the presence of crystalline Co 3 O 4 . Additionally, it has been reported that the CoFeO x material has a new peak at 2338 cm À1 , which corresponds to the vibration of Co-O-Fe, 26,[40][41][42] demonstrating the interaction between Co and Fe cations. For the FTIR of the 2D/1D CoFe-ZIF samples before calcining, the peaks at 1130 and 1360 cm À1 are attributed to the vibrations of the C-N and C-C bonds, respectively, which confirmed the successfully synthesized of CoFe-ZIF.…”

“…This conversion process is very beneficial to the elimination of catalytic oxidation of o-DCB and the improvement of catalytic efficiency. 26 The XPS spectra of Cl 2p on the 2D/1D CoFeO x /CoO x and u-2D/1D CoFeO x /CoO x catalysts are displayed in Fig. 7e.…”

“…In the H 2 -TPR test, the reduction process of CoO x is usually Co 3+ -Co 2+ -Co 0 , and the reduction process of FeO x is usually Fe 2 O 3 -Fe 3 O 4 -FeO. 26,49 The reduction peaks of 2D/1D CoO x /CoFeO x and 2D CoFeO x are similar in shape, with two broad peaks. The broad peak at 482 1C is due to the reduction of Co 3+ and Co 2+ in Co 3 O 4 .…”

Atomically dispersed Ru catalysts for polychlorinated aromatic hydrocarbon oxidation

“…It is previously reported that the concentration of surface active oxygen (O sur ) was closely connected with the catalytic activity in o-DCB oxidation. 34,35 Therefore, XPS was used to calculate the relative concentration of O sur at 531.1-531.8 eV among surface adsorbed oxygen (O ads ) at 532-532.7 eV and lattice oxygen (O latt ) at 530.3-530.6 eV based on the corresponding integrated area (Fig. 7a and b).…”