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Received August 18, 2017
Accepted September 20, 2017
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Synthesis of Ni promoted molybdenum dioxide nanoparticles using solvothermal cracking process for catalytic partial oxidation of n-dodecane
Department of Chemical Engineering, Kyung Hee University, Yongin 17104, Korea 1Department of Chemical & Biomolecular Engineering, Seoul National University of Science and Technology, Seoul 01811, Korea
Korean Journal of Chemical Engineering, January 2018, 35(1), 283-288(6), 10.1007/s11814-017-0262-3
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Abstract
Ni promoted MoO2 nanoparticles were synthesized by combining spray pyrolysis and solvothermal cracking process. First, polycrystalline MoO3 microparticles were prepared by spray pyrolysis at 600 oC. Then nano-sized Ni- MoO2 particles were formed by solvothermal cracking process after adding Ni precursor, which disassembled polycrystalline MoO3 microparticles into crystalline grains by thermal expansion and shattered them into Ni-MoO2 nanoparticles by the subsequent solvothermal polyol reduction process. TPR profiles of Ni-MoO2 nanoparticles presented the decrease of reducibility of MoO2 with addition of Ni promoter. Catalytic partial oxidation of n-dodecane was conducted at various temperatures from 450 °C to 850 °C using Ni-MoO2 nanoparticles and pure MoO2 nanoparticles. H2 yield of all the Ni-MoO2 nanoparticles was higher than that of pure MoO2 nanoparticles at 850 °C. Specially, 7 and 10mol% Ni-MoO2 nanoparticles showed desirable catalytic performance of ca. 60% of H2 yield. This is mainly attributed to the existence of polymolybdate with addition of Ni and Ni2+ species partly located in the polymolybdate layer without formation of bulk Ni phase.
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Choi H, Kim D, Yoon SP, Han J, Ha S, Kim J, J. Anal. Appl. Pyrolysis, 112, 276 (2015)
Liu M, Kong L, Lu C, Ma X, Li X, Luo Y, Kang L, J. Mater. Chem., 1(4), 1380 (2013)
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Qu LL, Zhang WP, Kooyman PJ, Prins R, J. Catal., 215(1), 7 (2003)
Arnoldy P, De Jonge J, Moulijn JA, J. Phys. Chem., 89(21), 4517 (1985)
Chen J, Li W, Shen R, Korean J. Chem. Eng., 33(2), 500 (2016)
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Dufresne P, Payen E, Grimblot J, Bonnelle JP, J. Phys. Chem., 85(16), 2344 (1981)
Matsubara E, Shinoda K, Japanese J. Appl. Phys., 38(S1), 576 (1999)
