Silver nanoparticle-decorated molybdenum disulfide nanosheets: An efficient bifunctional electrocatalyst for ascorbic acid sensing and hydrogen evolution reaction

• Published in: Materials letters 2025-03, Vol.382, p.137866, Article 137866
• Main Authors: Vijina, C., Nafila, K.P., Thanseeha, Mubeena, Shima, P.D.
• Format: Article
• Language: English
• Subjects: Ascorbic acid; Electrochemical sensor; Hydrogen evolution; Molybdenum disulphide; Silver nanoparticles
• ISSN: 0167-577X
• DOI: 10.1016/j.matlet.2024.137866

[Display omitted] •Simple and environmentally friendly one-pot hydrothermal synthesis MoS2/Ag nanohybrid.•High-density distribution of Ag nanoparticles on MoS2 achieved with the help of APTMS functionalization.•Ag/MoS2 sensor exhibited an excellent detection limit of 0.77 µM for ascorbic acid sensing with high sensitivity.•Nanohybrid holds good electrocatalytic activity towards HER with an overpotential of −0.44 V. The present study reports the simple and environmentally benign synthesis of an efficient bifunctional electrocatalyst comprised of silver (Ag) nanoparticles-decorated molybdenum disulphide (MoS2) nanosheets for ascorbic acid (AA) sensing and hydrogen evolution reaction (HER). The Ag/MoS2 sensor exhibited an excellent detection limit of 0.77 µM for AA sensing with a wide linear detection range of 500–2500 μM. The Ag/MoS2 nanohybrid also holds good electrocatalytic activity towards HER with an overpotential of −0.44 V at acurrent density of −10 mA/cm2 and a Tafel slope value of 131.7 mV dec−1. The large surface of MoS2 and its fast electron transfer characteristics in conjunction with the good electrocatalytic activity of Ag nanoparticles are responsible for the excellent electrochemical performance of the developed nanohybrid.