Multiple Phases of Molybdenum Carbide as Electrocatalysts for the Hydrogen Evolution Reaction

Multiple Phases of Molybdenum Carbide as Electrocatalysts for the Hydrogen Evolution Reaction

Molybdenum carbide has been proposed as a possible alternative to platinum for catalyzing the hydrogen evolution reaction (HER). Previous studies were limited to only one phase, β‐Mo2C with an Fe2N structure. Here, four phases of Mo‐C were synthesized and investigated for their electrocatalytic acti...

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Bibliographic Details
Published in:Angewandte Chemie (International ed.) 2014-06, Vol.53 (25), p.6407-6410
Main Authors: Wan, Cheng, Regmi, Yagya N., Leonard, Brian M.
Format: Article
Language:eng
Subjects:
carbides
Composite materials
electrocatalysis
Electrocatalysts
Hydrogen evolution
Hydrogen evolution reactions
Iron nitride
Metal oxides
Molybdenum
Molybdenum carbide
Molybdenum carbides
nanocatalysis
Nanomaterials
nanoparticles
Nanostructure
Phases
Photoelectron spectroscopy
Photoelectrons
Platinum
Spectrum analysis
Stability
Synthesis
Valence band
X-ray photoelectron spectroscopy
X-rays
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Summary:Molybdenum carbide has been proposed as a possible alternative to platinum for catalyzing the hydrogen evolution reaction (HER). Previous studies were limited to only one phase, β‐Mo2C with an Fe2N structure. Here, four phases of Mo‐C were synthesized and investigated for their electrocatalytic activity and stability for HER in acidic solution. All four phases were synthesized from a unique amine–metal oxide composite material including γ‐MoC with a WC type structure which was stabilized for the first time as a phase pure nanomaterial. X‐ray photoelectron spectroscopy (XPS) and valence band studies were also used for the first time on γ‐MoC. γ‐MoC exhibits the second highest HER activity among all four phases of molybdenum carbide, and is exceedingly stable in acidic solution. Four phases of Mo‐C, including γ‐MoC which was stabilized for the first time as a nanomaterial, were synthesized and investigated for their catalytic activity and stability in the hydrogen evolution reaction (HER). X‐ray photoelectron spectroscopy and valence band studies were also conducted for the first time on γ‐MoC.
ISSN:1433-7851
1521-3773