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Coupled molybdenum carbide and reduced graphene oxide electrocatalysts for efficient hydrogen evolution.


ABSTRACT: Electrochemical water splitting is one of the most economical and sustainable methods for large-scale hydrogen production. However, the development of low-cost and earth-abundant non-noble-metal catalysts for the hydrogen evolution reaction remains a challenge. Here we report a two-dimensional coupled hybrid of molybdenum carbide and reduced graphene oxide with a ternary polyoxometalate-polypyrrole/reduced graphene oxide nanocomposite as a precursor. The hybrid exhibits outstanding electrocatalytic activity for the hydrogen evolution reaction and excellent stability in acidic media, which is, to the best of our knowledge, the best among these reported non-noble-metal catalysts. Theoretical calculations on the basis of density functional theory reveal that the active sites for hydrogen evolution stem from the pyridinic nitrogens, as well as the carbon atoms, in the graphene. In a proof-of-concept trial, an electrocatalyst for hydrogen evolution is fabricated, which may open new avenues for the design of nanomaterials utilizing POMs/conducting polymer/reduced-graphene oxide nanocomposites.

SUBMITTER: Li JS 

PROVIDER: S-EPMC4822009 | biostudies-literature | 2016 Apr

REPOSITORIES: biostudies-literature

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Coupled molybdenum carbide and reduced graphene oxide electrocatalysts for efficient hydrogen evolution.

Li Ji-Sen JS   Wang Yu Y   Liu Chun-Hui CH   Li Shun-Li SL   Wang Yu-Guang YG   Dong Long-Zhang LZ   Dai Zhi-Hui ZH   Li Ya-Fei YF   Lan Ya-Qian YQ  

Nature communications 20160401


Electrochemical water splitting is one of the most economical and sustainable methods for large-scale hydrogen production. However, the development of low-cost and earth-abundant non-noble-metal catalysts for the hydrogen evolution reaction remains a challenge. Here we report a two-dimensional coupled hybrid of molybdenum carbide and reduced graphene oxide with a ternary polyoxometalate-polypyrrole/reduced graphene oxide nanocomposite as a precursor. The hybrid exhibits outstanding electrocataly  ...[more]

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