The Low-energy Consumption Hydrogen Production Coupling System for Water Electrolysis Based on the Oxidation Azo Reaction of 3,4-Diaminofurazan
The oxygen evolution reaction(OER),which has slow kinetics and low economic value of the product,seriously reduces the energy conversion efficiency of the overall water electrolysis for hydro-gen production and the economic benefits of its practical applications.Therefore,replacing OER with an oxidation reaction that has a lower potential and higher value can effectively reduce the cell voltage and en-ergy consumption for hydrogen production,improve the energy conversion efficiency,and at the same time obtain high-value-added chemical products.This paper establishes a new low-energy-consumption water electrolysis for hydrogen production coupling system based on the oxidative azo coupling reaction of 3,4-diaminofurazan.The specific method is to use a carbon cloth-supported NiS2 catalyst(CC@NiS2)as the cathode hydrogen evolution reaction catalyst and utilize a copper oxide nanocatalyst to drive the anode re-action,thereby constructing the entire coupling system and conducting relevant experimental tests and ana-lyses.This system only requires a cell voltage of 1.45 V to drive a current density of 10 mA·cm-2,which is 330 mV lower than that of the traditional water electrolysis system(1.78 V).Among them,the carbon cloth-supported NiS2 catalyst as the cathode hydrogen evolution reaction catalyst can stably operate for more than 20 hours with an overpotential of only 190.5 mV when driving a current density of 10 mA·cm-2.Mean-while,the anode can achieve the electrosynthesis of 3,3'-diamino-4,4'-azofurazan energetic materials.Driv-en by the copper oxide nanocatalyst,problems such as high danger,high pollution,and high cost that occur in conventional organic synthesis are avoided.This paper provides a new strategy for the safe production of energetic organic compounds and the low-energy-consumption and green preparation of high-purity hydro-gen.
low-energy hydrogen productioncoupling systemgreen electrosynthesisenergetic materialstransition metal sulfides
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