Bioinspired Nano-Catalysts for Nitrogen Fixation in Soil

Abstract

Nitrogen is a critical macronutrient required for plant growth that is still challenging to make bioavailable in the soil. Conventional nitrogen fixation techniques such as the Haber-Bosch process and microbial nitrogen fixation have environmental disadvantages, limited scalability and inefficiencies. This study explores bioinspired nano-catalysts for direct atmospheric nitrogen fixation in soil, at room temperature and ambient pressure, to replace synthetic fertilizers and the need for microbial mediation. These nano-catalysts mimic nitrogenase enzyme functions to convert atmospheric nitrogen (N2) into bioavailable ammonia (NH3) and nitrate (NO3) under ambient conditions. Advanced materials, namely metal-organic frameworks (MOFs), enzyme-mimetic nanostructures and electrocatalysts, are employed to improve nitrogen adsorption, catalytic efficiency and nitrogen reduction reactions. The study systematically synthesizes, characterizes and evaluates the soil performance of bioinspired nano-catalysts, showing that they can greatly increase nitrogen fixation efficiency, nitrogen retention in soil and crop yield over conventional fertilization methods. They also reduce greenhouse gas emissions and environmental runoff, offering a scalable, eco-friendly alternative to conventional fertilizers. The findings advance sustainable agriculture, minimization of environmental degradation and efficient nitrogen management in agronomy.