Details

Autor(en) / Beteiligte

• Guo, Pan
• Wu, Yu-Xuan
• Lau, Woon-Ming
• Liu, Hao
• Liu, Li-Min

Titel

CoS nanosheet arrays grown on nickel foam as an excellent OER catalyst

Ist Teil von

• Journal of alloys and compounds, 2017-11, Vol.723, p.772-778

Ort / Verlag

Lausanne: Elsevier B.V

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Hydrogen is the most promising alternative energy source for many common applications because its combustion product is only water and it has a very high calorific-value. However, the overpotential in water-splitting is high due to the harsh oxygen evolution reaction (OER). Therefore, effective catalysts which are low-cost and easy to prepare are urgently needed to stimulate the reaction. Herein we constructed 3D CoS nanosheets arrays on nickel foam through a combination of electrodeposition and sulfidation. The as-prepared catalyst can catalyze OER efficiently with an overpotential of 297 mV to generate 10 mA cm−2 current density in 1 M KOH and is able to maintain excellent performance over 40 h without obvious degradation. •3D binder-free precursor was prepared by electrodeposition.•3D binder-free CoS nanosheet arrays was prepared by hydrothermal sulfidation.•The CoS@NF exhibits high activity and stability in OER.