Metal–Organic Framework (MOF)‐Derived Carbon‐Mediated Interfacial Reaction for the Synthesis of CeO₂−MnO₂ Catalysts

Abstract

CeO2‐based catalysts are widely studied in catalysis fields. Developing one novel synthetic approach to increase the intimate contact between CeO2 and secondary species is of particular importance for enhancing catalytic activities. Herein, an interfacial reaction between metal–organic framework (MOF)‐derived carbon and KMnO4 to synthesize CeO2−MnO2, in which carbon is derived from the pyrolysis of Ce‐MOFs under an inert atmosphere, is described. The MOF‐derived carbon is found to restrain the growth of CeO2 crystallites under a high calcination temperature and, more importantly, intimate contact within CeO2/C is conveyed to CeO2/MnO2 after the interfacial reaction; this is responsible for the high catalytic activity of CeO2−MnO2 towards CO oxidation.

Confined Transformation of Organometal‐Encapsulated MOFs into Spinel CoFe2O4/C Nanocubes for Low‐Temperature Catalytic Oxidation

“…In comparison with sample CoFe 2 O 4 (723 K) at 781.02 eV, the shift of corresponding peak of CoFe 2 O 4 /C (623 K) to 781.89 eV implies the strong interaction between CoFe 2 O 4 and porous carbon (Figure 6b). 45 As shown in Figure 6c and Figure S7c (Supporting Information), the spectra of O 1s for all the samples are resolved into three peaks and contributed to O Fe/Co (lattice oxygen), O OH (surface oxygen), and O V (oxygen vacancies) 46. Table S2 (Supporting Information) shows the area percentages of different O elemental calculated from XPS spectra.…”

Rare‐Earth‐Based Metal–Organic Frameworks as Multifunctional Platforms for Catalytic Conversion

“…For example, some catalysts derived from Cebased MOFs can be used in CO oxidation. [97,[99][100][101][102][103][104] Zhang et al reported cauliflower-and strawsheave-like Ce-based catalysts derived from MOF materials with large surface areas. These porous catalysts can provide enough active sites and oxygen vacancies and exhibit excellent catalytic performance for CO oxidation.…”

Cobalt‐Enhanced Mass Transfer and Catalytic Production of Sulfate Radicals in MOF‐Derived CeO2 • Co3O4 Nanoflowers for Efficient Degradation of Antibiotics

“…For the O1s, the peak of O latt distributed at ≈528-530 eV, the small shift was attributed to the difference of the CeO and CoO bonds; the peak of O ads was located at ≈532.9 eV which was attributed to the hydroxyl species of water adsorbed on surface; [63][64][65] simultaneously, the peak located at 531.3 eV can be assigned to the O vac which referred to the defect site with low oxygen coordination. [66,67] With the introduction of the Co, the content of O vac posed a trend of S3, Supporting Information). As for the Co 2p, the deconvoluted peaks of 779.5 and 794.6 eV were assigned to Co 3+ , and the peaks of 794.5 and 781.1 eV were ascribed to Co 2+ , and the two peaks at 803.6 and 785.5 eV were assigned to the weak 2p satellite peaks.…”