Boosting the oxygen evolution electrocatalysis of layered nickel hydroxidenitrate nanosheets by iron doping. (23rd April 2019)

• Record Type: Journal Article
• Authors: Liu, Yaoyao; Han, Ning; Jiang, Jing; Ai, Lunhong
• Is Part Of: International journal of hydrogen energy. Volume 44:Number 21(2019)
• Page Start: 10627
• Page End: 10636
• Publication Date: 2019-04-23
• Subjects: Oxygen evolution -- Doping -- Electronic modulation -- Nanosheet -- Electrocatalysis; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.03.010
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Development of earth-abundant electrocatalysts with high activities and strong duribilities for oxygen evolution reaction (OER) has received the increased interests for various sustainable energy storage and conversion systems. Herein, we report a novel non-noble-metal electrocatalyst based on layered nickel hydroxidenitrate [Ni3 (NO3 )2 (OH)4 ] nanosheets and demonstrate that iron doping strategy greatly boosts their OER performances.. The spectroscopic investigation and cyclic voltammetry analysis confirm the favorable electronic interaction between nickel and iron in Ni3-x Fex (NO3 )2 (OH)4 . The optimal Ni2·85 Fe0·15 (NO3 )2 (OH)4 catalyst exhibits the earlier onset potential and smaller overpotential at 10 mA cm −2 compared with those of the state-of-the-art IrO2 in 1.0 M KOH solution. Graphical abstract: Image 1 Highlights: Iron-doped nickel hydroxidenitrates were synthesized by one-pot hydrothermal route. Iron-doped nickel hydroxidenitrate nanosheets were explored as a novel OER electrocatalyst. Iron doping can greatly boost the electrocatalytic OER performance of nickel hydroxidenitrate. Mechanism of OER electrocatalysis on iron-doped nickel hydroxidenitrate was discussed.