Co-catalytic Effects of CoS2 on the Activity of the MoS2 Catalyst for Electrochemical Hydrogen Evolution

• DOI: 10.1021/acs.langmuir.7b00580
• Publication Date: 2017-05-25T21:39:28Z
• Authors: Ranjith Bose; Zhenyu Jin; Seokhee Shin; Sungjoon Kim; Sunyoung Lee; Yo-Sep Min
• Keywords: Chemical state

MoS2 is a promising material to replace the Pt catalyst in electrochemical hydrogen evolution reaction (HER). It well known that activity of HER significantly promoted by doping cobalt atoms. Recently, Co–Mo–S phase, which atoms decorate edge positions slabs, has been identified as co-catalytic phase Co-doped (Co-MoSx) with low Co content. Here, we report effect incorporation chemical state Co-MoSx catalyst, gives rise effect. catalysts various contents were prepared on carbon fiber paper simple hydrothermal process. On high content (Co/Mo ≈ 2.3), dramatically higher catalytic was observed compared for 0.36). Furthermore, found not be but CoS2 Raman spectroscopy, X-ray photoelectron diffraction, and transmission electron microscopy. believed an alternative choice co-catalyze MoS2-based catalysts.