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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

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MOLYBDENUM CARBIDE CATALYSTS .2. TOPOTACTIC SYNTHESIS OF UNSUPPORTED POWDERS

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Title
MOLYBDENUM CARBIDE CATALYSTS .2. TOPOTACTIC SYNTHESIS OF UNSUPPORTED POWDERS
Other Titles
MOLYBDENUM CARBIDE CATALYSTS .2. TOPOTACTIC SYNTHESIS OF UNSUPPORTED POWDERS
Author
Lee, Jae SungVOLPE, L.RIBEIRO, F. H.BOUDART, M.
Issue Date
1988-07
Publisher
ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS
Citation
JOURNAL OF CATALYSIS, v.112, no.1, pp.44 - 53
Abstract
Metastable cubic α-MoC1-x(x ~ 0.5) unsupported powders with specific surface area ca. 200 m2 g-1 and particle size ca. 3 nm were prepared by temperature-programmed reaction (TPR) of MoO3 with ammonia producing first Mo2N which was subsequently converted to α-MoC1-x by TPR with a CH4/H2 mixture. Alternatively, a direct TPR of MoO3 with a CH4/H2 mixture also produced α-MoC1-x, provided that a small amount of platinum was impregnated on MoO3 prior to TPR. Reactions involved in both processes were topotactic, with formation of metastable α-MoC1-x crystals exhibiting pseudomorphism with the original platelets of MoO3, the starting material. Without platinum, the reaction between MoO3 and CH4/H2 required a higher temperature of initial reduction and the reaction was not topotactic, leading to hexagonal Mo2C, the thermodynamically stable phase of molybdenum carbide. © 1988.
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DOI
10.1016/0021-9517(88)90119-4
ISSN
0021-9517
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ECHE_Journal Papers
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