Effect of Cu during Non-Isothermal Hydrogen Reduction of MoO3


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The effect of Cu on the hydrogen reduction of molybdenum oxide powders was investigated by measuring the humidity change during a non-isothermal process of hydrogen reduction. The presence of Cu induced a shift in the reduction temperature and strongly affected the reduction processes of MoO3→Mo4O11→MoO2, which comprised the contained chemical vapor transport of MoOx(OH)2. This study suggests that the surface of the Cu grains acts as a nucleation site for the reduction of MoOx(OH)2 to MoO2 particles from MoO3 or Mo4O11 phases. Such an activated reduction process results in the deposition of metallic Mo and MoO2 particles on the surface of the Cu grains.



Materials Science Forum (Volumes 534-536)

Edited by:

Duk Yong Yoon, Suk-Joong L. Kang, Kwang Yong Eun and Yong-Seog Kim




G. S. Kim et al., "Effect of Cu during Non-Isothermal Hydrogen Reduction of MoO3", Materials Science Forum, Vols. 534-536, pp. 1253-1256, 2007

Online since:

January 2007




[1] M. J. Kennedy, S. C. Bevan: J. Less Common Met. Vol. 36 (1974) p.23.

[2] A. Sardi: Acta Chim. Acad. Sic. Hung. Vol. 39 (1963) p.145.

[3] D. T. Hawkins, W. L. Worrel: Met. Trans. Vol. 1 (1970) p.271.

[4] Werner V. Schulmeyer, Hugo M. Ortner: Int. J. Refract. Met. Hard Mater. Vol. 20 (2002) p.261.

[5] E. Lassner, W.D. Schubert: Tungsten, Kluwer Academic/Plenum Press, NY (1999).

[6] D. -G. Kim, K.H. Min, S. -Y. Chang, S. -T. Oh, C. -H. Lee, Y.D. Kim: Mater. Sci. Eng. A Vol. 399 (2005) p.326.

[7] G. -S. Kim, Y.J. Lee, D. -G. Kim, S. -T. Oh, D. -S. Kim and Y.D. Kim: J. Alloys Compd. Article in press.

[8] G. C. Bond and J. B. P. Tripathi: J. Less-Common Met. Vol. 36 (1974) p.31.

[9] Yu. M. Solonin: Powder Metall. Met. Ceram. Vol. 18 (1979) p.217.