Two‐Step Hydrothermal Synthesis of CoSe/MoSe2 as Hydrogen Evolution Electrocatalysts in Acid and Alkaline Electrolytes

• DOI: 10.1002/celc.201901382
• Publication Date: 2019-09-11T06:09:57Z
• Authors: Wei Song; Kelei Wang; Guanping Jin; Zhongbing Wang; Chaoxiong Li; Xinming Yang; Chunnian Chen
• Keywords: 01 natural sciences; 7. Clean energy; 0104 chemical sciences; 3. Good health

Abstract Recently, composite electrocatalytic hydrogen evolution materials have received a lot of attention, especially the material transition metal dichalcogenides. In this article, CoSe/MoSe 2 was successfully synthesized by simple two‐step hydrothermal method, then nanostructure and chemical composition characterized X‐ray diffraction (XRD), photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM) high‐resolution transmission (HRTEM). Compared to pure MoSe CoSe, exhibits excellent catalytic. The current density 10 mA cm −2 could be reached at low overpotentials 192 115 mV in acidic alkaline electrolytes, respectively. addition, such has small Tafel slope transport resistance, which indicates that high dissociation rate. Furthermore, it shows cycling stability.