Find in Library
Search millions of books, articles, and more
Indexed Open Access Databases
Fabrication of Robust Hydrogen Evolution Reaction Electrocatalyst Using Ag<sub>2</sub>Se by Vacuum Evaporation
oleh: Sajjad Hussain, Jinwoong Chae, Kamran Akbar, Dhanasekaran Vikraman, Linh Truong, Bilal Abbas Naqvi, Yawar Abbas, Hyun-Seok Kim, Seung-Hyun Chun, Gunn Kim, Jongwan Jung
Format: | Article |
---|---|
Diterbitkan: | MDPI AG 2019-10-01 |
Deskripsi
Much research has been done on reliable and low-cost electrocatalysts for hydrogen generation by water splitting. In this study, we synthesized thin films of silver selenide (Ag<sub>2</sub>Se) using a simple thermal evaporation route and demonstrated their electrocatalytic hydrogen evolution reaction (HER) activity. The Ag<sub>2</sub>Se catalysts show improved electrochemical surface area and good HER electrocatalytic behavior (367 mV overpotential @ 10 mA·cm<sup>−2</sup>, exchange current density: ~1.02 × 10<sup>−3</sup> mA·cm<sup>−2</sup>, and Tafel slope: 53 mV·dec<sup>−1</sup>) in an acidic medium). The reliability was checked in 0.5 M sulfuric acid over 20 h. Our first-principles calculations show the optimal energy of hydrogen adsorption, which is consistent with experimental results. The works could be further extended for finding a new catalyst by associating the selenide, sulfide or telluride-based materials without complex catalyst synthesis procedures.