Electronic Structure Modulation of Fe-Mof High-Efficiency Electrocatalysts for Overall Water Splitting and Urea Electrocatalysisscript are in Red Color

Abstract

Rational regulating of the electronic structure and the electrochemical surface area (ECSA) of metal-organic frameworks (MOFs) electrocatalysts, improving the stability of MOFs are critical for the overall water splitting and urea oxidation reaction (UOR). Herein, a grown in-situ of Fe-MOFs electrocatalysts on Fe Foam (FF) is developed by the strategy combining simple hydrothermal method and advanced plasma technology. The morphology and electronic structure of Fe-MOF/FF can be modulated through the controllable plasma technology treatment time, and the adsorption free energy required for the reaction intermediates can be reduced. It also significantly enhances the conductivity and increases ECSA, and reduces the resistance of hydrogen evolution, thus exhibiting enhanced water splitting and UOR activity. At a current density of 10 mA cm-2, the overall water splitting and overall urea electrolysis require only 1.55 V and 1.472 V, with excellent stability. Therefore, the plasma technology provides new inspiration and methods for developing multifunctional catalysts for efficient water splitting and purification of urea-rich industrial wastewater.

Keywords: Metal-organic framework, Plasma technology, Electronic structure, ECSA, Electrocatalyst.