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

• Published in: Applied surface science 2023-05, Vol.619, p.156698, Article 156698
• Main Authors: Li, Chuanqiang, Liu, Xiang, Peng, Tao, Zhang, Tong, Lin, Chuanchuan, Zhang, Yangyang, Chai, Qianqian, Qiu, Wenge, Song, Liyun
• Format: Article
• Language: English
• Subjects: Binary Co–Mn oxide; Mechanical-coordination chemistry; Metal-organic framework; Oxygen defect; Propane oxidation
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2023.156698

[Display omitted] •Oxygen defect-rich binary Co–Mn metal oxides were prepared using bimetallic-organic frameworks with hexanuclear SBUs as precursors, which synthesized based upon a mechanical-coordination chemistry approach.•The close coupling of Mn and Co promotes the formation of oxygen-deficient structures.•The considerable catalytic performance of catalyst is associated with its smaller grain size, larger specific surface area, abundant interface defects and oxygen defects.•The strategy for the synthesis of Co/Mn-BTC and deriving oxygen-deficient catalysts is simple, and could potentially be applied on an industrial scale. 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.