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Enhanced Oxygen Evolution Reaction with a Ternary Hybrid of Patronite-Carbon Nanotube-Reduced Graphene Oxide : A Synergy between Experiments and Theory
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- Samantara, Aneeya K. (author)
- Natl Inst Sci Educ & Res NISER, Sch Chem Sci, Khurja 752050, Odisha, India; Homi Bhabha Natl Inst, Mumbai 400094, Maharashtra, India
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- Das, Jiban K. (author)
- Natl Inst Sci Educ & Res NISER, Sch Chem Sci, Khurja 752050, Odisha, India; Homi Bhabha Natl Inst, Mumbai 400094, Maharashtra, India
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- Ratha, Satyajit (author)
- Indian Inst Technol Bhubaneswar, Sch Basic Sci, Jatni 752050, Odisha, India
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- (creator_code:org_t)
- 2021-07-23
- 2021
- English.
- In: ACS Applied Materials and Interfaces. - : American Chemical Society (ACS). - 1944-8244 .- 1944-8252. ; 13:30, s. 35828-35836
- Journal article (peer-reviewed)
Abstract
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- This 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.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Keyword
- oxygen evolution reaction
- metal chalcogenide
- water oxidation
- density functional theory
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- ref (subject category)
- art (subject category)
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- Uppsala University
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