Physicochemical Properties of MnO2 Catalyst Prepared via Hydrothermal Process and its Application for CO Oxidation 


Vol. 21,  No. 4, pp. 248-256, Dec.  2015
10.7464/ksct.2015.21.4.248


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  Abstract

MnO2 was prepared by a hydrothermal process method in the range of 120-200 ℃ and 0.5-5 h, calcined at 300 ℃ after induction of precipitation using KMnO4 and MnCl2?H2O, and its catalytic activity was compared for CO oxidation. The catalysts were characterized using by X-ray diffraction, N2-sorption, scanning electron microscopy, and temperature programmed reduction of H2 or CO. The crystalline structure of pure α-MnO2 or hybrid α/β-MnO2 was controlled by the preparation conditions. The pure α-MnO2 showed better catalytic activity and thermal stability than hybrid α/β-MnO2. Especially, α-MnO2 prepared at 150 ℃ for 1 h has the highest specific surface area 214 m2 g-1, reducibility and labile lattice oxygen species analyzed by H2, CO-TPR, respectively. It also showed the best CO oxidation activity in both conditions of temperature programmed and isothermal reaction. The results came from the physicochemical properties of catalysts like the crystalline structure, specific surface area, reducibility and lattice oxygen species, and which are correlated with catalytic performance.

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  Cite this article

[IEEE Style]

L. YH, J. SA, P. SJ, Y. HK, S. CH, "Physicochemical Properties of MnO2 Catalyst Prepared via Hydrothermal Process and its Application for CO Oxidation," Clean Technology, vol. 21, no. 4, pp. 248-256, 2015. DOI: 10.7464/ksct.2015.21.4.248.

[ACM Style]

Lee YH, Jeon SA, Park SJ, Youn HK, and Shin CH. 2015. Physicochemical Properties of MnO2 Catalyst Prepared via Hydrothermal Process and its Application for CO Oxidation. Clean Technology, 21, 4, (2015), 248-256. DOI: 10.7464/ksct.2015.21.4.248.

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eISSN : 2288 - 0690

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