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Ruthenium oxides supported on heterostructured CoPO-MCF materials for catalytic oxidation of vinyl chloride emissions

Wang, Chao, Tian, Chengcheng, Guo, Yanglong, Zhang, Zhendong, Hua, Wenchao, Zhan, Wangcheng, Guo, Yun, Wang, Li, Lu, Guanzhong
Journal of hazardous materials 2018 v.342 pp. 290-296
X-ray diffraction, X-ray photoelectron spectroscopy, acidity, ammonia, catalysts, catalytic activity, cobalt, desorption, emissions, foams, nanoparticles, nitrogen, organochlorine compounds, oxidation, oxides, ruthenium, vinyl chloride
A novel heterostructured material, cobalt phosphate-SiO2 mesostructured cellular foams (CoPO-MCF), was successfully synthesized by in situ growth. The material was characterized by X-ray diffraction (XRD), nitrogen sorption, temperature-programmed reduction (H2-TPR and CO-TPR), temperature-programmed desorption of NH3 (NH3-TPD), and X-ray photoelectron spectroscopy (XPS). A ruthenium precursor was readily introduced and highly dispersed on the CoPO nanophases of the CoPO-MCF through an impregnation method. The resulting Ru/CoPO-MCF catalyst exhibited high catalytic activity for the oxidation of vinyl chloride (VC). The results of three consecutive runs and long-term tests showed high stability of the Ru/CoPO-MCF for the catalytic oxidation of VC. The unique heterostructures of the CoPO-MCF not only improve the reducibility and acidity of the MCF but also strengthen the interaction between ruthenium oxide nanoparticles and the CoPO-MCF support, which contributes to the enhanced catalytic performance.