Hydrothermal assisted morphology designed MoS2 material as alternative cathode catalyst for PEM electrolyser application

Senthil Kumar, S. M. ; Selvakumar, K. ; Thangamuthu, R. ; Karthigai Selvi, A. ; Ravichandran, S. ; Sozhan, G. ; Rajasekar, K. ; Navascues, N. ; Irusta, S. (Universidad de Zaragoza)

Resumen: In this work, we developed a simple and cost-effective hydrothermal route to regulate the formation of molybdenum disulfide (MoS2) in different morphologies, like, nano-sheet, nano-capsule and nano-flake structure by controlling the reaction temperature and sulphur precursor employed. Such a fine tuning of different morphologies yields a leverage to obtain novel shapes with high surface area to employ them as suitable candidates for hydrogen evolution catalysts. Moreover, we report here the first time observation of MoS2 nano-capsule formation via environmentally benign hydrothermal route and characterized them by X-ray diffraction (XRD), nitrogen adsorption and desorption by Brunaer–Emmett–Teller (BET) method, scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) and X-ray photo-electron spectroscopy (XPS) techniques. MoS2 nano-capsules exhibits superior activity towards hydrogen evolution reaction (HER) with a low over-potential of 120 mV (RHE), accompanied by large exchange current density and excellent stability in 0.5 M H2SO4 solution. MoS2 nano-capsule catalyst was coated on solid proton conducting membrane (Nafion) and IrO2 as anode catalyst. The performance of the catalyst was evaluated in MEA mode for 200 h at 2 V without any degradation of electrocatalytic activity.

Idioma: Inglés

DOI: 10.1016/j.ijhydene.2016.05.285

Año: 2016

Publicado en: International Journal of Hydrogen Energy 41, 31 (2016), 13331-13340
ISSN: 0360-3199

Factor impacto JCR: 3.582 (2016)

Categ. JCR: ELECTROCHEMISTRY rank: 7 / 29 = 0.241 (2016) - Q1 - T1
Categ. JCR: ENERGY & FUELS rank: 28 / 92 = 0.304 (2016) - Q2 - T1
Categ. JCR: CHEMISTRY, PHYSICAL rank: 45 / 145 = 0.31 (2016) - Q2 - T1

Factor impacto SCIMAGO: 1.145 - Condensed Matter Physics (Q1) - Renewable Energy, Sustainability and the Environment (Q1) - Fuel Technology (Q1) - Energy Engineering and Power Technology (Q1)

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)