One-pot synthesis of MoS2–CNx–metal oxide hetero structures and their synergistic role towards efficient oxygen reduction reaction

Two-dimensional transition metal dichalcogenides are at the forefront of materials research due to their exceptional catalytic, electronic and chemical properties. Herein, we developed a unique heterointerface comprising MoS 2 /CN x /metal oxide (Fe, Co, Ni) to scrutinize the effects of metal oxide...

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Published inJournal of materials research Vol. 38; no. 7; pp. 1824 - 1831
Main Authors Sakthivel, Arunkumar, Subramanian, Mohana Priya, Prabhakaran, Dhanasekaran, Bhat, Santoshkumar Dattatray, Alwarappan, Subbiah
Format Journal Article
LanguageEnglish
Published Cham Springer International Publishing 14.04.2023
Springer Nature B.V
Subjects
Applied and Technical Physics
Biomaterials
Catalysts
Chemical properties
Chemical reduction
Chemistry and Materials Science
Cobalt oxides
Durability
Inorganic Chemistry
Invited Paper
Iron
Materials Engineering
Materials research
Materials Science
Metal oxides
Molybdenum disulfide
Nanotechnology
Nickel
Oxygen reduction reactions
Surface properties
Transition metal compounds
Durability
Hetrointerface
Layered electrocatalyst
Oxygen reduction reaction
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Summary:Two-dimensional transition metal dichalcogenides are at the forefront of materials research due to their exceptional catalytic, electronic and chemical properties. Herein, we developed a unique heterointerface comprising MoS 2 /CN x /metal oxide (Fe, Co, Ni) to scrutinize the effects of metal oxide anchored within MoS 2 layers towards oxygen reduction reaction and catalyst durability. MoS 2 /CN x /metal oxide (Fe,Co,Ni) is prepared by a solution combustion method (one-step process). Surface properties and morphology are investigated by various surface probing techniques viz. FT-IR, Raman, XRD, EDAX and TEM. Results revealed that upon MoS 2 integration onto the metal oxides, the ORR activity was found to be significantly enhanced. Further, MoS 2 –CN x –FeO x matrix retains more than 50% of initial ORR activity at − 0.2 V and is more durable than pristine MoS 2 . The mass activity of metal oxide appreciably improved when combined with MoS 2 . The mass-specific current density towards ORR at − 0.4 V of the catalysts MoS 2 , MoS 2 /CN x /FeO x , MoS 2 /CN x /CoO x and MoS 2 /CN x /NiO x are − 0.5 mA cm −2 , − 0.7 mA cm −2 , − 0.42 mA cm −2 and 0.23 mA cm −2 respectively. Graphical abstract
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ISSN:0884-2914
2044-5326
DOI:10.1557/s43578-023-00902-4