Rapid Fabrication of Ni/NiO@CoFe Layered Double Hydroxide Hierarchical Nanostructures by Femtosecond Laser Ablation and Electrodeposition for Efficient Overall Water Splitting
Citations Over TimeTop 19% of 2019 papers
Abstract
The development of simple and effective methods for the rapid preparation of electrocatalysts for overall water splitting from earth-abundant elements is an important and challenging task. A facile and ultrafast two-step method was developed to prepare a Ni/NiO@CoFe layered double hydroxide hierarchical nanostructure (NCF) within a few minutes by femtosecond laser ablation and electrodeposition. In 1 m KOH solution, the optimized NCF catalysts show a low overpotential of 230 mV for the oxygen evolution reaction (OER) at a current density of 10 mA cm-2 with a low Tafel slope of 34.3 mV dec-1 , indicating fast and efficient OER kinetics. Owing to the synergistic effect between NiO and CoFe layered double hydroxide, the hydrogen evolution reaction performance of the NCF was also improved. The synthesized electrocatalysts were further utilized in overall water splitting with a potential of only 1.56 V at a current density of 10 mA cm-2 and excellent durability, better than that of the commercial RuO2 (+)//Pt/C(-) system. The present work provides new insights on the rapid and facile preparation of efficient electrocatalysts for overall water splitting on a large scale.
Related Papers
- → 3D MoS2-rGO@Mo nanohybrids for enhanced hydrogen evolution: The importance of the synergy on the Volmer reaction(2018)56 cited
- → MoS 2 nanosheets on C 3 N 4 realizing improved electrochemical hydrogen evolution(2017)19 cited
- → Effect of the amount of nickel sulphide, molybdenum disulphide and carbon nanosupport on a Tafel slope and overpotential optimization(2017)18 cited
- → Co(Ni)–Mo–Sx Chalcogels Films as pH-Universal Electrocatalysts for the H2 Evolution Reaction(2019)6 cited
- Friction Induced Structural Transformation of Bulk Nanostructured MoS2 for Hydrogen Evolution Reaction(2018)