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CHEMICAL RESEARCH IN CHINESE UNIVERSITIES · 2017 ·Vol. 33 ·期 6 ·965-970 · IF 1.024

Facile synthesis of mesoporous Co3O4 nanoflowers for catalytic combustion of ventilation air methane

Liu Shankui,Liu Pengcheng,Niu Ruyue,Wang Shuang,Li Jinping

Flower-like Co 3 O 4 hierarchical microspheres composed of self-assembled porous nanoplates were prepared by employing Pluronic F127 block-copolymer as template. The samples were characterized by powder X-ray diffraction(PXRD), scanning/transmission electron microscopy(SEM/TEM), and nitrogen adsorption-desorption at 77 K. The results show that the catalytic activity of Co 3 O 4 nanoflowers for the combustion of ventilation air methane is higher than that of commercial Co 3 O 4 . The superior catalytic performance of this material can be related to its dominantly exposed {112} crystal planes and higher content of surface Co 3+ .

研究领域: 材料科学 · 环境催化

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ENERGY & FUELS · 2020 · IF 3.421

Abatement of n-Butane by Catalytic Combustion over Co-ZSM-5 Catalysts

Wei Zhao,Shanshan Ruan,Siyu Qian,Beibei Feng,Chengcheng Ao,Lei Wang,Fuyi Liu,Lidong Zhang

Catalytic combustion has become a promising technology to address the accelerating volatile organic compounds (VOCs) emissions. In this work, cobalt modified ZSM-5 zeolite catalysts (3–18 wt % Co) were prepared to investigate the combustion of n-butane (one typical model component of VOCs). The performances of catalysts were evaluated by conducting experiments in a flow tube reactor. XRD, BET, FT-IR, and XPS were also utilized to characterize their physicochemical properties. A significant enhancement of the catalytic activity was demonstrated in terms of the cobalt supported over ZSM-5, with an optimal cobalt loading of 7 wt %. The excellent catalytic activity of 7 wt % Co-ZSM-5 is mainly attributed to a higher concentration of active surface Co3+ species. Furthermore, DFT calculations indicated that the role of Co can enhance the activity by decreasing the activation barriers for C–H bond cleavage. In addition, the primary reaction mechanism of n-butane combustion on Co-ZSM-5 was also revealed.

研究领域: 环境科学 · 催化化学

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Facile synthesis of mesoporous Co3O4 nanoflowers for catalytic combustion of ventilation air methane

Abatement of n-Butane by Catalytic Combustion over Co-ZSM-5 Catalysts