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Download fileEnhanced Oxygen Evolution Reaction with a Ternary Hybrid of Patronite–Carbon Nanotube-Reduced Graphene Oxide: A Synergy between Experiments and Theory
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posted on 24.07.2021, 04:04 by Aneeya
K. Samantara, Jiban K. Das, Satyajit Ratha, Naresh K. Jena, Brahmananda Chakraborty, J. N. BeheraThis
work reports the hybridization of patronite (VS4) sheets
with reduced graphene oxide and functionalized carbon nanotubes
(RGO/FCNT/VS4) through a hydrothermal method. The synergistic
effect divulged by the individual components, i.e., RGO, FCNT, and
VS4, significantly improves the efficiency of the ternary
(RGO/FCNT/VS4) hybrid toward the oxygen evolution reaction
(OER). The ternary composite exhibits an impressive electrocatalytic
OER performance in 1 M KOH and requires only 230 mV overpotential
to reach the state-of-the-art current density (10 mA cm–2). Additionally, the hybrid shows an appreciable Tafel slope with
a higher Faradaic efficiency (97.55 ± 2.3%) at an overpotential
of 230 mV. Further, these experimental findings are corroborated by
the state-of-the-art density functional theory by presenting adsorption
configurations, the density of states, and the overpotential of these
hybrid structures. Interestingly, the theoretical overpotential follows
the qualitative trend RGO/FCNT/VS4 < FCNT/VS4 < RGO/VS4, supporting the experimental findings.