Electrochemical oxygen generation from VO2 nanoflakes decorated onto graphite sheet
Source abstract
Abstract
The present study deals with the synthesis of VO 2 anchored across graphite sheets using a carbothermal reduction technique. The phase identification, elemental, and morphology of the obtained VO 2 /graphite heterostructure were examined using analytical techniques. Morphological characterization by FESEM confirms the formation of nanoflakes like the structure of VO 2 /graphite heterostructure. The sample obtained was drop cast onto graphite and the material was utilized as a working electrode for the electrochemical oxygen evolution reaction (OER). The VO 2/graphite heterostructure shows an overpotential of 470 mV as compared to V 2O 5/graphite, which has an overpotential of 800 mV during OER in alkaline media. Additionally, the VO 2 /graphite electrocatalyst exhibits a low charge transfer resistance of 29.5 Ω and a low Tafel slope value corresponding to 85 mV dec −1. The results signify that the VO 2/graphite heterostructure has emerged as an efficient catalytic material for OER application. Therefore, the present work focuses on the simpler method for the synthesis of VO 2/graphite heterostructure with long-term performance during O 2 evolution and also renders the potential catalytic applications of vanadium-based metal oxide.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Transition Metal Oxide Nanomaterials · Electrocatalysts for Energy Conversion · Advanced battery technologies research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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