Excellent Bifunctional Water Electrolysis Activities of α-MoO3/AC Nanocomposites

Electrocatalytic water splitting is a cost-effective and environment-friendly technique for producing oxygen and hydrogen through the oxygen/hydrogen evolution reaction (OER/HER). Developing the highly active and stable electrocatalyst, particularly for bifunctional water electrolysis (i.e., both OE...

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Bibliographic Details
Published in:International journal of energy research 2024-01, Vol.2024, p.1-13
Main Authors: Sekar, Sankar, Yun, Ji-Seop, Park, Seoyeon, Kim, Deuk Young, Lee, Youngmin, Lee, Sejoon
Format: Article
Language:English
Subjects:
Activated carbon
Annealing
Biomass
Carbon
Cost analysis
Electrocatalysts
Electrochemical analysis
Electrochemistry
Electrodes
Electrolysis
Energy consumption
Gels
Graphene
Hybridization
Hydrogen
Hydrogen evolution reactions
Microscopy
Molybdenum
Molybdenum trioxide
Nanocomposites
Nanoparticles
Oxygen
Sol-gel processes
Spectrum analysis
Synergistic effect
Water
Water splitting
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Summary:Electrocatalytic water splitting is a cost-effective and environment-friendly technique for producing oxygen and hydrogen through the oxygen/hydrogen evolution reaction (OER/HER). Developing the highly active and stable electrocatalyst, particularly for bifunctional water electrolysis (i.e., both OER and HER), is still a formidable challenge. Herein, we demonstrated the enhanced bifunctional water splitting activities by utilizing the molybdenum trioxide-anchored activated carbon (MoO3/AC) nanocomposites. The MoO3/AC samples were fabricated by the ultrasonication method using sol-gel synthesized MoO3 and biomass-derived AC, and they displayed a nanostreusel-like morphology with spherical MoO3 nanoparticle-decorated AC nanosheets. For the water electrolysis test, the MoO3/AC nanocomposites exhibited the excellent bifunctional electrocatalytic OER and HER performances with low overpotential and small Tafel slope values. Through analyzing the material characteristics and the electrochemical properties of MoO3/AC, it was found that the superb bifunctional OER-HER activities were attributed to the synergistic effects from the hybridization of highly conductive AC and electrochemically active α-MoO3. The results pronounce that the MoO3/AC nanocomposites possess an aptitude as a superb bifunctional OER/HER electrocatalyst for high-performance water electrolysis.
ISSN:0363-907X
1099-114X
DOI:10.1155/2024/3167699