Fabrication of robust hydrogen evolution reaction electrocatalyst using ag2se by vacuum evaporation

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

    Research output: Contribution to journalArticlepeer-review

    12 Scopus citations

    Abstract

    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 (Ag2Se) using a simple thermal evaporation route and demonstrated their electrocatalytic hydrogen evolution reaction (HER) activity. The Ag2Se catalysts show improved electrochemical surface area and good HER electrocatalytic behavior (367 mV overpotential @ 10 mA·cm−2, exchange current density: ~1.02 × 10−3 mA·cm−2, and Tafel slope: 53 mV·dec−1) 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.

    Original languageBritish English
    Article number1460
    JournalNanomaterials
    Volume9
    Issue number10
    DOIs
    StatePublished - Oct 2019

    Keywords

    • Ag2Se
    • First-principle
    • HER
    • Thermal evaporation

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