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Electrochemical cycling and beyond: unrevealed activation of MoO3 for electrochemical hydrogen evolution reactions
- Source :
- Chemical Communications. 53:2245-2248
- Publication Year :
- 2017
- Publisher :
- Royal Society of Chemistry (RSC), 2017.
-
Abstract
- We demonstrate electrochemical cycling-induced reduction of MoO3 to monoclinic molybdenum dioxide and molybdenum sub-oxides (MoO3-x), which exhibit excellent electrochemical hydrogen evolution reaction (HER) activity. The conversion of MoO3 during cycling was probed; after 250 cycles, the redox peaks were found to diminish with an onset potential shift and increased HER current density. At 400 cycles, the insertion/deinsertion processes observed in the initial cycles are completely absent and the HER current density is enhanced to the maximum. The effect of MoO3 morphology and size on the electrochemical reduction of MoO3 was also studied.
- Subjects :
- Chemistry
Inorganic chemistry
Metals and Alloys
chemistry.chemical_element
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
Electrochemistry
01 natural sciences
Redox
Catalysis
0104 chemical sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
chemistry.chemical_compound
Molybdenum
Materials Chemistry
Ceramics and Composites
Hydrogen evolution
0210 nano-technology
Cycling
Current density
Molybdenum dioxide
Monoclinic crystal system
Subjects
Details
- ISSN :
- 1364548X and 13597345
- Volume :
- 53
- Database :
- OpenAIRE
- Journal :
- Chemical Communications
- Accession number :
- edsair.doi...........d0e7bed7f6f87b6728f66599b3a0e08d