Efficient electrochemical hydrogen evolution activity of nanostructured Ag 3 PO 4 /MoS 2 heterogeneous composite catalyst.

Autor: Satheesh D; Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu, 603203, Tamilnadu, India., Baskar L; Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu, 603203, Tamilnadu, India., Jayavelu Y; Department of Physics, National Institute of Technology, Warangal, Telangana, 506004, India., Dekshinamoorthy A; Corrosion and Materials Protection Division, CSIR-Central Electrochemical Research Institute, Karaikudi, 630003, Tamilnadu, India., Sakthinathan VR; Corrosion and Materials Protection Division, CSIR-Central Electrochemical Research Institute, Karaikudi, 630003, Tamilnadu, India., Daniel PJ; Department of Physics, National Institute of Technology, Warangal, Telangana, 506004, India., Vijayaraghavan S; Corrosion and Materials Protection Division, CSIR-Central Electrochemical Research Institute, Karaikudi, 630003, Tamilnadu, India., Krishnan K; Corrosion and Materials Protection Division, CSIR-Central Electrochemical Research Institute, Karaikudi, 630003, Tamilnadu, India., Rajendran R; Department of Physics, St. Theresa's Arts & Science College for Women, Tharangambadi, Mayiladuthurai District, Tamilnadu, 609313, India., Pachaiappan R; Departamento de Ingeniería Mecánica, Facultad de Ingeniería Mecánica, Universidad de Tarapacá, Avda. General Velasquez 1775 , Arica, Chile., Manavalan K; Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu, 603203, Tamilnadu, India. Electronic address: mkovendhan@gmail.com.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2024 Mar; Vol. 351, pp. 141220. Date of Electronic Publication: 2024 Jan 13.
DOI: 10.1016/j.chemosphere.2024.141220
Abstrakt: Hydrogen (H 2 ) generation by electrochemical water splitting is a key technique for sustainable energy applications. Two-dimensional (2D) transition-metal dichalcogenide (MoS 2 ) and silver phosphate (Ag 3 PO 4 ) possess excellent electrochemical hydrogen evolution reaction (HER) properties when they are combined together as a composite rather than individuals. Reports examining the HER activity by using Ag 3 PO 4 , especially, in combination with the 2D layered MoS 2 are limited in literature. The weight fraction of MoS 2 in Ag 3 PO 4 is optimized for 1, 3, and 5 wt%. The Ag 3 PO 4 /1 wt % MoS 2 combination exhibits enhanced HER activity with least overpotential of 235 mV among the other samples in the acidic medium. The synergistic effect of optimal nano-scale 2D layered MoS 2 structure and Ag 3 PO 4 is essential for creating higher electrochemical active surface area of 217 mF/cm 2 , and hence this leads to faster reaction kinetics in the HER. This work suggests the advantages of Ag 3 PO 4 /1 wt % MoS 2 heterogeneous composite catalyst for electrochemical analysis and HER indicating lower resistivity and low Tafel slope value (179 mV/dec) among the prepared catalysts making it a promising candidate for its use in practical energy applications.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: