Electrodeposited Co1-xMoxS thin films as highly efficient electrocatalysts for hydrogen evolution reaction in acid medium
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Efficient and cost-effective electrocatalysts for hydrogen evolution reaction (HER) are significant for the advancement of effective water splitting reaction. Herein, we describe the growth of cobalt molybdenum sulfide (CoMoS) at different composites of tightly packed nanocrystals, prepared by one step process of simple electrodeposition method on fluorine-doped tin oxide (FTO) substrate as highly active and low-cost HER electrocatalyst. The prepared electrocatalysts were characterized via various analytical techniques. The HER activity was evaluated through electrochemical methods such as cyclic voltammetry technique and impedance analysis. Exhaustive electrochemical examinations show that the Co0.95Mo0.05S achieved higher cathodic current density value of 14.3 mA/cm2 at η = 250 mV with a lowest Tafel slope value towards HER. Furthermore, the active surface area of the as-deposited composite materials has been calculated by cyclic voltammetry analysis. Hence, the present work illustrates that the Co0.95Mo0.05S composite can serve as an encouraging cost-effective substitute to platinum-based electrocatalyst for HER.
KeywordsHydrogen evolution reaction Electrodeposition Cobalt molybdenum sulfide Electrochemistry Thin film
The authors Mr. K. Premnath and Dr. J. Madhavan are grateful to the authorities of Thiruvalluvar University for their support.
Dr. Prabhakarn Arunachalam, Prof. Abdullah Al-Mayouf, and Prof. Mohamed A Ghanem would like to extend their sincere appreciation to the Deanship of Scientific Research at King Saud University for funding this Research group NO: RG-1438-087.
- 3.Cortright RD, Davda RR, Dumesic JA (2002) Hydrogen from catalytic reforming of biomass-derived hydrocarbons in liquid water. Cheminform 418:964–970Google Scholar
- 29.Behranginia A, Asadi M, Liu C, Yasaei P, Kumar B, Phillips P, Foroozan T, Waranius JC, Kim K, Abiade J, Klie R, Curtiss L, Salehi-Khojin A (2016) Highly efficient hydrogen evolution reaction using crystalline layered three dimensional molybdenum disulfides grown on graphene film. Chem Mater 28:549–555CrossRefGoogle Scholar
- 35.Liu YM, Hui S, Xin Z, Ying XD, Kangli D, Zhanzhao L (2015) Co–doped MoS2 nanosheets with dominant CoMoS phase coated on carbon as an excellent electrocatalyst for hydrogen evolution. ACS Appl Mater Interfaces 5:8420–8426Google Scholar
- 37.Dong C, Qian T, Ling Wen L, Shao Xiong L (2011) Determining the active surface area for various platinum electrodes. Electrocatalysis 2:1868–5994Google Scholar