Rationally Designed Ag@polymer@2-D LDH Nanoflakes for Bifunctional Efficient Electrochemical Sensing of 4-Nitrophenol and Water Oxidation Reaction

• DOI: 10.1021/acsami.1c19077
• Publication Date: 2022-01-27T14:41:03Z
• Authors: Dhanasekaran Than...; Yuanfu Chen; Padmanaban Annamalai; Manigandan Ramadoss; Vengidusamy Naray...
• Keywords: Overpotential; Chronoamperometry; Oxygen evolution

The rational design and demonstration of a facile sequential template-mediated strategy to construct noble-metal-free efficient bifunctional electrocatalysts for oxygen evolution reaction (OER) electrocatalytic detection hazardous environmental 4-nitrophenol (4-NP) have continued as major challenging task. Herein, we novel Ag@polymer/NiAl LDH (designated APL) nanohybrid an electrocatalyst by simple hydrolysis method. well-fabricated APL/GCE exhibited extensive linear range from 0.1 100 μM in optimized conditions. It showed limit (LOD) 0.0096 (9.6 nM) (S/N = 3) 4-NP pH 6 differential pulse voltammetry (DPV). Meanwhile, the newly fabricated APL outstanding OER activity with very low overpotential 259 mV deliver 10 mA cm-2 current density (J) at scan rate 5 mV/s. Tafel plot value is (97 mV/dec) compared that benchmark RuO2 due fast kinetic reaction. Besides, durability was assessed chronoamperometry test (CA) 36 h 1.55 vs RHE, long-term cycling stability analyzed using cyclic (CV); after 5000 cycles, highly stable. These demonstrated results could lead alternative construction bifunctionally electrochemical sensing