Bimetallic metal-organic framework derived electrocatalyst for efficient overall water splitting. (1st March 2019)

• Record Type: Journal Article
• Authors: Chen, Zhiming; Xu, Bo; Yang, Xiaodong; Zhang, Haijing; Li, Cuncheng
• Is Part Of: International journal of hydrogen energy. Volume 44:Number 12(2019)
• Page Start: 5983
• Page End: 5989
• Publication Date: 2019-03-01
• Subjects: Hydrogen evolution reaction -- Oxygen evolution reaction -- Overall water splitting -- Electrocatalyst; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.01.082
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The development of bifunctional catalysts that can be applied to both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is widely regarded as a key factor in the production of sustainable hydrogen fuel by electrochemical water splitting. In this work, we present a high-performance electrocatalyst based on nickel-cobalt metal-organic frameworks for overall water splitting. The as-obtained catalyst shows low overpotential to reaches the current density of 10 mA cm −2 with 249 mV for OER and 143 mV for HER in alkaline media, respectively. More importantly, when the electrolyzer was assembled with the as-prepared catalyst as anode and cathode simultaneously, it demonstrates excellent activity just applies a potential of 1.68 V to achieve 10 mA cm −2 current density for overall water splitting. Graphical abstract: Image 1 Highlights: NiCoSe/C was prepared by direct selenylation of Ni/Co metal-organic framework. The NiCoSe/C catalyst shows high performance for both OER and HER. The NiCoSe/C catalyst shows efficient overall water splitting property.