Nanocomposite-electrocatalysts from oxide and sulfide of molybdenum in alkaline medium for hydrogen evolution
Hybrid materials combining oxides and sulfides have emerged as promising electrocatalysts for the hydrogen evolution reaction (HER). However, their efficacy in replacing the noble metal electrocatalysts is challenged due to insufficient charge transfer and corrosion losses in acidic media. Hybrid na...
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| Language: | English |
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Elsevier
2025-08-01
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| Series: | Results in Surfaces and Interfaces |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666845925001813 |
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| author | L. Sophia Jacquline Elangovan Elamurugu |
| author_facet | L. Sophia Jacquline Elangovan Elamurugu |
| author_sort | L. Sophia Jacquline |
| collection | DOAJ |
| description | Hybrid materials combining oxides and sulfides have emerged as promising electrocatalysts for the hydrogen evolution reaction (HER). However, their efficacy in replacing the noble metal electrocatalysts is challenged due to insufficient charge transfer and corrosion losses in acidic media. Hybrid nanocomposite-electrocatalysts were synthesized using 200 nm wide MoO3 nanorods, and MoS2 nanosheets. This hybrid catalyst utilizes the synergistic interaction between the oxide and sulfide components. Among the synthesized nanocomposites, the MoS2 enriched catalyst showed an excellent stability in the alkaline media. The uniform MoO3 rods act as proton adsorption sites to hold water molecules, by providing the oxygen lattice. The MoS2 nanosheets offer active edge sites and high HER kinetics for the efficient release of hydrogen. A low overpotential of 177 mV at a current density of 100 mA cm−2 with a Tafel slope of 86 mV dec−1 was obtained. The inclusion of MoS2 has reduced the bandgap of the nanocomposite, facilitating an enhanced charge transfer and a high hydrogen evolution rate of 2.13 mmol h−1 cm−2 at −0.5 V versus RHE. The superior catalytic activity of the MoS2 enriched catalyst can be attributed to its abundant active and proton-adsorbing sites, which have boosted its performance for HER in alkaline conditions. |
| format | Article |
| id | doaj-art-697d30729fb24902bffc2c839ca9a0bd |
| institution | Kabale University |
| issn | 2666-8459 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Surfaces and Interfaces |
| spelling | doaj-art-697d30729fb24902bffc2c839ca9a0bd2025-08-20T03:50:21ZengElsevierResults in Surfaces and Interfaces2666-84592025-08-012010059410.1016/j.rsurfi.2025.100594Nanocomposite-electrocatalysts from oxide and sulfide of molybdenum in alkaline medium for hydrogen evolutionL. Sophia Jacquline0Elangovan Elamurugu1iDARE Laboratory, Department of Physics and Nanotechnology, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, 603 203, Tamilnadu, IndiaCorresponding author.; iDARE Laboratory, Department of Physics and Nanotechnology, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, 603 203, Tamilnadu, IndiaHybrid materials combining oxides and sulfides have emerged as promising electrocatalysts for the hydrogen evolution reaction (HER). However, their efficacy in replacing the noble metal electrocatalysts is challenged due to insufficient charge transfer and corrosion losses in acidic media. Hybrid nanocomposite-electrocatalysts were synthesized using 200 nm wide MoO3 nanorods, and MoS2 nanosheets. This hybrid catalyst utilizes the synergistic interaction between the oxide and sulfide components. Among the synthesized nanocomposites, the MoS2 enriched catalyst showed an excellent stability in the alkaline media. The uniform MoO3 rods act as proton adsorption sites to hold water molecules, by providing the oxygen lattice. The MoS2 nanosheets offer active edge sites and high HER kinetics for the efficient release of hydrogen. A low overpotential of 177 mV at a current density of 100 mA cm−2 with a Tafel slope of 86 mV dec−1 was obtained. The inclusion of MoS2 has reduced the bandgap of the nanocomposite, facilitating an enhanced charge transfer and a high hydrogen evolution rate of 2.13 mmol h−1 cm−2 at −0.5 V versus RHE. The superior catalytic activity of the MoS2 enriched catalyst can be attributed to its abundant active and proton-adsorbing sites, which have boosted its performance for HER in alkaline conditions.http://www.sciencedirect.com/science/article/pii/S2666845925001813MoO3/MoS2 nanocompositeHybrid catalystsProton adsorptionActive sitesHeterostructure |
| spellingShingle | L. Sophia Jacquline Elangovan Elamurugu Nanocomposite-electrocatalysts from oxide and sulfide of molybdenum in alkaline medium for hydrogen evolution Results in Surfaces and Interfaces MoO3/MoS2 nanocomposite Hybrid catalysts Proton adsorption Active sites Heterostructure |
| title | Nanocomposite-electrocatalysts from oxide and sulfide of molybdenum in alkaline medium for hydrogen evolution |
| title_full | Nanocomposite-electrocatalysts from oxide and sulfide of molybdenum in alkaline medium for hydrogen evolution |
| title_fullStr | Nanocomposite-electrocatalysts from oxide and sulfide of molybdenum in alkaline medium for hydrogen evolution |
| title_full_unstemmed | Nanocomposite-electrocatalysts from oxide and sulfide of molybdenum in alkaline medium for hydrogen evolution |
| title_short | Nanocomposite-electrocatalysts from oxide and sulfide of molybdenum in alkaline medium for hydrogen evolution |
| title_sort | nanocomposite electrocatalysts from oxide and sulfide of molybdenum in alkaline medium for hydrogen evolution |
| topic | MoO3/MoS2 nanocomposite Hybrid catalysts Proton adsorption Active sites Heterostructure |
| url | http://www.sciencedirect.com/science/article/pii/S2666845925001813 |
| work_keys_str_mv | AT lsophiajacquline nanocompositeelectrocatalystsfromoxideandsulfideofmolybdenuminalkalinemediumforhydrogenevolution AT elangovanelamurugu nanocompositeelectrocatalystsfromoxideandsulfideofmolybdenuminalkalinemediumforhydrogenevolution |