Heterogeneous Cobalt‐Catalyzed C−C Bond Cleavage in Alcohols to Carbonyl Compounds

• Published in: ChemCatChem 2021-10, Vol.13 (20), p.4355-4363
• Main Authors: Teng, Jia‐nan, Zhu, Rui, Li, Xinglong, Fu, Yao
• Format: Article
• Language: English
• Subjects: Additives; aerobic oxidative cleavage; Alcohols; Ammonia; Carbonyl compounds; Carbonyls; Cleavage; Cobalt oxides; C−C bond; Fourier transforms; heterogeneous catalysis; High resolution electron microscopy; Inductively coupled plasma; Infrared radiation; Metal oxides; Optical emission spectroscopy; Oxidizing agents; Oxygen; Photoelectrons; Reaction mechanisms; Scanning transmission electron microscopy; Selectivity
• ISSN: 1867-3880; 1867-3899
• DOI: 10.1002/cctc.202100950

Cobalt oxide hydrate (Co(OH)x) supported on metal oxides were prepared. The oxidative cleavage of C(OH)−C bond in alcohol was catalyzed by Co(OH)x/metal oxides using molecular oxygen as the oxidant, and the corresponding product was obtained with high selectivity. The composition and characteristics of the catalysts were analyzed by X‐ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), high‐angle ring dark‐field scanning TEM (HAADF‐STEM), N2 physico‐adsorption characterization, inductively coupled plasma optical emission spectrometry (ICP‐OES), Fourier transform infrared spectrum (FTIR), X‐ray photoelectron spectroscopy (XPS) and NH3‐temperature‐programmed desorption (NH3‐TPD). Additionally, a reasonable reaction mechanism was proposed based on the characterization results and a series of controlled experiments. Notably, this heterogeneous catalytic system did not require any additives and had good recycling performance. Oxidizing with oxygen: The catalyst of cobalt oxide hydrate (Co(OH)x) supported on metal oxides was prepared. And the oxidative cleavage of C(OH)−C bond in alcohol was catalyzed by Co(OH)x/metal oxides using molecular oxygen as the oxidant, and the corresponding product was obtained with high selectivity.