Design, Synthesis And Electrochemical Application Of One-dimensional Molybdenum-based Nitrides

In recent years,the emergence of energy and environmental issues have led our researchers to develop new,efficient and environmentally friendly energy conversion materials.Transition metals have attracted the attention of researchers because of their variability in structure and composition.In recent years,many researchers have combined the transition metal before and after to form a double?multi?metal,which has improved its performance.Molybdenum-based materials are currently receiving widespread attention due to their low cost,variable valence and abundant storage.Based on the research and analysis of the above literature,this paper develops the application of one-dimensional rod structure as a template.Based on the interaction between materials,ZIF-67,Ni?OH?₂ and NiMoO₄ are successfully loaded,and a new method for synthesizing composite materials is obtained,which improves the performance of electrocatalytic overall water splitting.The main research content is divided into the following three parts:?1?The ZIF-67/Mo-MOFs composite was synthesized by using Mo-MOFs 1D rod structure as the substrate and then loading ZIF-67 polyhedron.Further high temperature nitriding results in a one-dimensional tubular Co-Mo₂N hybrid.The material has good hydrogen evolution reaction,oxygen evolution reaction and electrocatalytic overall water splitting catalytic activity.?2?Nickel-molybdenum composite metals also have good electrocatalytic properties.Therefore,NiMoO₄ nanorods were selected as the core material,and Ni?OH?₂nanosheets were loaded onto NiMoO₄ nanorods by secondary hydrothermal method to finally synthesize NiMoO₄@Ni?OH?₂ precursors.Further,a molybdenum-nickel double metal nitride material with morphology retention was prepared by high temperature nitridation and reduction treatment.The material has good electrocatalytic hydrogen evolution reaction,oxygen evolution reaction and electrocatalytic overall water splitting catalytic activity.?3?Based on the previous experimental investigation,a Co-Ni_0.2Mo_0.8N nitride material was further synthesized for electrocatalytic decomposition of water.The synthesized Co?CO₃?_0.5?OH?_0.11@NiMoO₄ was used as a precursor,and a further high-temperature nitriding treatment was carried out to obtain a Co-Ni_0.2Mo_0.8N material.Co-Ni_0.2Mo_0.8N material has good hydrogen evolution reaction,oxygen evolution reaction and electrocatalytic overall water splitting catalytic activity.