Oxygen defect–rich binary Co–Mn oxides derived from MOFs with hexanuclear SBUs synthesized based on a mechanochemistry approach for total oxidation of propane

Abstract

A Co/Mn-based metal–organic framework was used as a precursor to synthesize oxygen-rich defects in binary Co–Mn oxides using mechanical-coordination chemistry method. The samples were characterized using X-ray diffraction, Raman spectroscopy, N2 adsorption–desorption analysis, scanning-electron microscopy, X-ray photoelectron spectroscopy, electron paramagnetic resonance, and transmission-electron microscopy. H2-temperature-programmed reduction and O2-temperature-programmed desorption analyses were performed to examine the redox properties and mobility of the oxygen species in the catalysts, respectively. The sample obtained from Co/Mn-BTC-2/3 exhibited the highest catalytic activity for the total oxidation of propane, with a T90 of 255 ℃ at 120 L g−1 h−1. The considerable performance of the sample is associated with its smaller grain size, larger specific surface area, and abundant interface and oxygen defects. This study offers a simple strategy for the synthesis of Co/Mn-BTC with hexanuclear SBUs, further deriving to oxygen-deficient and high-performance propane elimination catalysts, which could potentially be applied on an industrial scale.