Mesoporous Molybdenum Sulfide-Oxide Composite Thin-Film Electrodes Prepared by a Soft Templating Method for the Hydrogen Evolution Reaction

• DOI: 10.1021/acsaem.2c00640
• Publication Date: 2022-06-07T13:44:22Z
• Authors: Cüneyt Karakaya; Navid Solati; Timuçin Balkan; Umut Savacı; Emre Keleş; Servet Turan; Sarp Kaya
• Keywords: Overpotential

Electrode designs involving binder-free nanoparticles integrated within interconnected pore networks are critical in scaling up electrolyzers. MoS2 is the most promising electrocatalyst candidate that can show hydrogen evolution reaction (HER) activity comparable to platinum (Pt). Herein, a facile one-step soft templating method was developed synthesize mesoporous molybdenum sulfide-oxide composite thin-film electrocatalysts directly on any substrate without using binder or template. Fabricated contain amorphous MoS3 and small crystallite-sized embedded into MoO3 with large surface area (around 182 m2/g). The layer undergoes situ electrochemical activation which reduced during HER acidic media. carbon fiber exhibits low overpotential (∼189 mV at 10 mA/cm2) Tafel slope (53 mV/dec) toward after activation.