Design Of PdCu₃ Alloy And FeNi Diatom Catalysts And Peformance Of Electrocatalytic CO₂ Reduction/O₂ Evolution

As one of the common compounds in the air,CO₂is an excellent energy substitute.In recent years,a large number of researchers have conducted research on CO₂and found that through electrocatalysis,CO₂can be converted into a series of renewable and sustainable new energy sources.In this thesis,a wet chemical method is used to prepare a catalyst with Pd Cu nano-alloy particles supported on a N-doped porous C substrate,and by adjusting the size of the Pd Cu alloy and the exposed crystal faces to construct an anchor on the carbon substrate with specific exposed crystal faces Pd Cu nano-alloy.The Faraday efficiency of the catalyst for CO generation at-0.5 V vs.RHE is close to 100%,and its stability can also exceed 30h.The improvement of its CO₂RR performance is attributed to active sites and high specific surface area brought by its unique alloy exposed surface,which not only facilitates the adsorption and activation of CO₂molecules,but also reduces the Gibbs free energy required to determine the step rate in the conversion of CO₂to CO.Since many electrochemical processes,such as water splitting to produce hydrogen,fuel cells,and metal-air batteries,all involve oxygen evolution reactions,oxygen evolution reactions play a very important role in electrochemistry and have attracted attention for a long time.It is necessary to develop a catalyst that can increase the oxygen evolution reaction rate.In this paper,a wet chemical method is used to load Fe Ni oxide on N-doped carbon black and doped with Cl.The synthesized catalyst has an overpotential of 226 m V at 10 m A cm^-2.And it has a stable performance of up to 100 h.This work has certain enlightening significance for the preparation of non-metallic elements doped bimetallic catalysts.