Nanoporous molybdenum dioxide on pencil graphite electrode as high effective electrocatalyst for the hydrogen evolution reaction

In this paper, we presented a really simple, cheap and fast preparation method for direct electrodeposition of MoO 2 on the pencil graphite electrode (PGE) as hydrogen evolution reaction (HER) catalyst with a high current density at a low overpotential. PGE was modified by molybdenum dioxide (MoO 2...

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Bibliographic Details
Published in:Journal of the Iranian Chemical Society 2019-10, Vol.16 (10), p.2065-2070
Main Authors: Pourbeyram, Sima, Ranjbar, Mahnaz, Soltanpour, Maryam
Format: Article
Language:English
Subjects:
Analytical Chemistry
Biochemistry
Catalysis
Chemistry
Chemistry and Materials Science
Dioxides
Electrodeposition
Electrodes
Electrolysis
Graphite
Hydrogen evolution reactions
Hydrogen production
Inorganic Chemistry
Molybdenum
Molybdenum oxides
Morphology
Organic Chemistry
Original Paper
Physical Chemistry
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Summary:In this paper, we presented a really simple, cheap and fast preparation method for direct electrodeposition of MoO 2 on the pencil graphite electrode (PGE) as hydrogen evolution reaction (HER) catalyst with a high current density at a low overpotential. PGE was modified by molybdenum dioxide (MoO 2 ) nanoporous via simple electrodeposition technique by electroreduction of Mo(VI) to Mo(IV) on the PGE. X-ray diffraction analysis showed a monoclinic structure of MoO 2 on the PGE. MoO 2 nanoporous morphology on the PGE was confirmed by scanning electron microscopy. The MoO 2 /PGE exhibited a small overpotential of 150 mV toward HER, close to the thermodynamic potential already observed on the Pt wire. The long-term stability of the MoO 2 –PGE was proved by extended electrolysis at overpotential of 200 mV with negligible degradation of catalytic current after 10 h. According to the obtained results, this developed method has high ability to use in clean hydrogen production technologies.
ISSN:1735-207X
1735-2428
DOI:10.1007/s13738-019-01674-7