Preparation And Electrochemical Properties Of Heterogeneous Element-Doped Cu-Based Catalysts

Electrochemistry has a wide range of applications in many fields due to its advantages such as being green and environmentally friendly.New environmental pollution treatment（water treatment,CO₂ treatment）,new energy（lithium battery,fuel cell）,Life medicine（Electrochemical luminescence,electrochemical sensor）,the vigorous development of electrochemical technology has brought many potential technological revolutions to the above fields.How to quickly promote the development of the above-mentioned new fields is inseparable from the study of related electrochemical technologies,especially the selection of appropriate electrode materials becomes particularly important.Among metal-based nanomaterials,Cu-based nanomaterials have been widely studied due to their low cost and excellent chemical properties.However,Cu-based catalysts have a small surface area and low active sites which has hindered the development of materials during the electrochemical reaction.Hence,this paper introduces the preparation and electrochemical performance of heterogeneous element doped Cu-based catalysts.The main contents are as follows:1.The prepared the N and Pd doped Cu₃PdN nanocrystals（NCs）and the research in the electrochemical reduction of CO₂:we report Cu₃PdN NCs catalyst is successfully prepared by solution synthesis method and applied to electrocatalytic reduction of CO₂.With the doping of Pd and N,the electrochemically surface areas（ECSAs）of Cu NPs increased,and Cu₃PdN NCs with the increase a large number of active sites.In addition,the gas phase products are mainly a small amount of CO（<5%）and H₂,and the liquid phase product are HCOOH.Moreover,the pyridinic-N for Cu₃PdN NCs may provide active sites in this paper.When precious metal Pd is added to the matrix of the composite,the electrocatalysis activity can be improved by synergistic effects.The feasibility for developed of Cu₃PdN NCs opens up new insights for further development of efficient electrocatalysts for conversion of CO₂ into valuable chemical fuel.2.Synthesis of Se-doped Cu_2-xSe Nanoparticles（NPs）and its application in glucose biosensor:in this work,a reliable strategy was developed to fabricate monodisperse Cu_2-xSe NPs with RGO as support for glucose biosensor application.These Cu_2-xSe NPs show high sensitivity of 536μM mM^-1 cm^-2,a wide linear detection range up to 3.375 mM and a low detection limit of 0.05 mM（S/N=3）.Besides,the monodisperse Cu_2-xSe NPs manifest an excellent selectivity and the ability of anti-interference substances.Moreover,the increase a large number of ECSAs provide lots of active sites to enhance the electrocatalytic activity compared with Cu NPs after selenization.This work verifies that monodisperse Cu_2-xSe NPs can be used as a non-enzymatic glucose sensor material for development applications.