Temperature-programmed desorption and surface reaction studies of CO on Co2C

doi:10.1016/S1872-2067(12)60615-9

Abstract

Abstract: Cobalt carbide (Co₂C) samples were prepared by carburizing Co with CO at 473 K for in excess of 400 h and were characterized by X-ray diffraction, transmission electron microscopy, CO temperature-programmed reduction, CO temperature-programmed desorption (CO-TPD), and CO temperature-programmed surface reaction. The prepared Co₂C samples were composed of bulk Co₂C with a surface CoO passivation layer. The passivation layer could be removed by reaction with CO at 477 K. CO desorbing at low temperature in CO-TPD experiments likely originated from chemisorbed CO. CO desorbing at high temperature was likely due to residual CO within the Co₂C crystal lattice. CO adsorbed on Co₂C reacted with H₂ to form alcohol.

Key words: Cobalt carbide, Passivation layer, Carbon monoxide adsorption, Hydrogenation, Alcohol

Yanpeng Pei, Yunjie Ding, Juan Zang, Xiangen Song, Wenda Dong, Hejun Zhu, Tao Wang, Weimiao Chen. Temperature-programmed desorption and surface reaction studies of CO on Co₂C[J]. Chinese Journal of Catalysis, 2013, 34(8): 1570-1575.

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Temperature-programmed desorption and surface reaction studies of CO on Co₂C

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