Facile synthesis of high surface area molybdenum nitride and carbide

Journal Article · Sat Aug 15 00:00:00 EDT 2015 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/J.JSSC.2015.05.007· OSTI ID:22486742

Roy, Aaron; Serov, Alexey; Artyushkova, Kateryna ^[1]; Brosha, Eric L. ^[2]; Atanassov, Plamen ^[1]

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1. Department of Chemical and Biological Engineering and Center for Micro-Engineered Materials, University of New Mexico, NM 87131 (United States)
2. Sensors and Electrochemical Devices (MPA-11), Los Alamos National Laboratory, NM 87545 (United States)

The synthesis of high surface area γ-Mo{sub 2}N and α-Mo{sub 2}C is reported (116 and 120 m{sup 2}/g) without the temperature programmed reduction of MoO{sub 3}. γ-Mo{sub 2}N was prepared in an NH{sub 3}-free synthesis using forming gas (7 at% H{sub 2}, N{sub 2}-balance) as the reactive atmosphere. Three precursors were studied ((NH{sub 4}){sub 6}Mo{sub 7}O{sub 24}·4H{sub 2}O, (NH{sub 4}){sub 2} Mg(MoO{sub 4}){sub 2}, and MgMoO{sub 4}) along with the sacrificial support method (SSM) as a means of reducing the particle size of Mo{sub 2}N and Mo{sub 2}C. In situ X-ray diffraction (XRD) studies were carried out to identify reaction intermediates, the temperature at which various intermediates form, and the average domain size of the Mo{sub 2}N products. Materials were synthesized in bulk and further characterized by XRD, HRTEM, XPS, and BET. - Highlights: • Facile synthesis of γ-Mo2N and α-Mo2C with surface area exceeding 100 m{sup 2}/g. • Sacrificial support method was used to achieve these high surface areas. • Materials can serve as catalysts or supports in (electro)chemical processes.

• OSTI ID: 22486742
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Vol. 228; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
AMMONIUM COMPOUNDS
CATALYSIS
CATALYSTS
FUEL CELLS
HYDROGEN
MAGNESIUM COMPOUNDS
MOLYBDATES
MOLYBDENUM
MOLYBDENUM CARBIDES
MOLYBDENUM NITRIDES
MOLYBDENUM OXIDES
PARTICLE SIZE
PRECURSOR
REACTION INTERMEDIATES
REDUCTION
SURFACE AREA
SYNTHESIS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY