Akademik Veri Yönetim Sistemi
“18th International Nanoscience and Nanotechnology Conference, İstanbul, Türkiye, 26 - 28 Ağustos 2024, ss.160
Hydrogen energy has recently received significant attention in various technological applications. The use of precious noble platinum group metals has been prevalent in the creation of functional electrodes for the hydrogen evolution reaction (HER). Given the cost implications associated with platinum group metals, there is an increasing need for HER catalysts that show high levels of activity derived from cost-effective and highly efficient materials. Transition metal dichalcogenide (TMDC) materials are perceived as suitable candidates to meet these criteria because of their distinct mechanical, electronic, and chemical properties that provide remarkable advantages to HER processes. In the broad spectrum of TMDC materials, tungsten disulfide (WS2) emerges as a particularly well-known substance that has been extensively researched in various fields, including energy storage mechanisms such as batteries and supercapacitors. The primary objective of this research is a comprehensive examination of the structures, properties, synthesis methodologies, and HER performance of WS2-based catalyst materials produced by the magnetron sputtering technique. This method facilitates the production of WS2 with various nanostructural morphologies, especially WS2 nanowalls. These nanowalls offer a significantly large surface area to improve the efficiency of HER. Furthermore, the robust mechanical properties of WS2 nanowalls are believed to provide long-term durability during operational scenarios. Electrochemical evaluations such as cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) reveal that sputtered WS2 nanowalls show minimal overpotential values and appropriate Tafel slopes, highlighting their effectiveness and kinetics in catalyzing HER. To summarize, sputtered WS2 nanowalls offer a promising strategy for enhancing HER performance by combining high surface area, abundant active sites, superior electronic properties, and mechanical durability to meet the growing demand for effective and cost-efficient HER catalysts.