Porous CoP nanosheet arrays grown on nickel foam as an excellent and stable catalyst for hydrogen evolution reaction. (2nd November 2017)

• Record Type: Journal Article
• Authors: Guo, Pan; Wu, Yu-Xuan; Lau, Woon-Ming; Liu, Hao; Liu, Li-Min
• Is Part Of: International journal of hydrogen energy. Volume 42:Number 44(2017)
• Page Start: 26995
• Page End: 27003
• Publication Date: 2017-11-02
• Subjects: Electrocatalyst -- Hydrogen evolution reaction -- Electrodeposition -- CoP; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2017.09.099
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Three dimensional porous CoP nanosheet arrays grown on nickel foam composite were designed and constructed through a combination of electrodeposition and phosphatization. Nanosheet arrays of cobalt (II) hydroxide were firstly formed on nickel foam via electrodeposition which is further phosphatized to form defect-rich porous CoP nanosheets. The as-prepared CoP nanosheets exhibit high activity as a catalyst for the hydrogen evolution reaction, and the overpotentials of generating a current density of 10 mA cm −2 are 79.5 mV and 86.6 mV in acidic and basic electrolytes, respectively. In addition, the as-prepared CoP nanosheet catalyst shows excellent stability in acidic electrolyte, and no obvious degradation was observed at 10 mA cm −2 for 50 h. The high activity is attributed to the unique three dimensional structure of the material as well as the metalloid characteristics of CoP. Highlights: 3D binder-free precursor was prepared by electrodeposition. 3D binder-free CoP nanosheet arrays was prepared by phosphatization. The CoP@NF exhibits high activity and stability towards HER in acidic and basic electrolyte.