Hybrid framework of sputter deposited vanadium nitride embedded Cu2O/CuO nanostructures for electrocatalytic oxygen evolution reaction
Source abstract
Abstract
Transition metal oxides/nitrides are among the most intriguing materials for electrochemical energy conversion whilst they are inexpensive, resistant to corrosion, and environmentally innocuous. In this regard, we report a hybrid network of Vanadium nitride entangled with the mixed phase of Cu 2 O/CuO producing nanoneedles to regulate overpotential and electrocatalytic performance of oxygen evolution reaction as a whole. Manifestation of dual metals (Vanadium and Copper) can enhance the electrocatalytic efficacy by diversifying the redox reactions and creating synergistic effects of metal cations. The catalyst fabrication technique presented in the current study allows tuning of the overpotential value, charge transfer resistance, electrochemical active surface area, and tafel slope by varying the plasma power during the sputtering of Vanadium. The obtained catalyst (Cu 2 O/CuO-VN @ 200 W) exhibits excellent electrocatalytic properties with a low overpotential of 190 mV at 10 mA/cm 2 and decreased tafel slope of 135 mv/decade in an alkaline medium. In addition, a remarkable electrochemical active surface area of 954 cm 2 , mass activity of 9.30 A/g, and high turnover frequency of 0.032 s −1 imply enriched and substantial exposure of abundant active sites. Moreover, radically reduced charge transfer resistance accelerated the rate of the water-splitting reaction.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Electrochemical Analysis and Applications · Advanced Memory and Neural Computing
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (75)
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