Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 47, Pages 41314-41322Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b13822
Keywords
molybdenum carbide; carbon nanosheet; hierarchical structure; electro-catalysis; hydrogen evolution reaction
Funding
- National Key Research and Development Program of China [2016YFA0203101]
- National Natural Science Foundation of China [51572139]
- Open Project of National & Local United Engineering Lab for Power Battery, Northeast Normal University [130017501]
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A facile and effective pyrolysis stratagem is proposed for the synthesis of hierarchical Mo2C/C nanosheet hybrids with sodium chloride (NaCl) crystals as a template. Large numbers of well-dispersed sheet-like Mo2C nanoparticles with the thickness of about 20 nm were anchored on the surface of carbon nanosheets. Benefiting from the ideal synergistic catalytic effect between the highly active sheet-like Mo2C nanoparticles and the conductive graphitic carbon, and strong charge transfer ability, the unique hierarchical sheet-like structure of Mo2C/C hybrids demonstrated excellent hydrogen evolution reaction (HER) performance in both alkaline and acid medias with small overpotential (125 mV for 10 mA cm(-2) in 1 M KOH and 180 mV for 10 mA cm(-2) in 0.5 M H2SO4) and remarkable stability, which is comparable to most reported non-noble metal HER electrocatalysts. With the simplicity and low-cost of the synthetic approach, the strategy presented here can be extendable to the preparation of other transition metal-based/carbon nanosheet hybrids for versatile applications.
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