{"title":"The role of Cu(II) in the process of forming non-stoichiometric copper sulphide coatings by a chemical route","authors":"J. Vinkevičius, A. Žielienė, G. Valiulienė","doi":"10.1080/00202967.1999.11871241","DOIUrl":null,"url":null,"abstract":"The composition of non-stoichiometric copper sulphide (Cu) coatings obtained during the interaction of Cu(II) with Na 2 S n (n = 1-4) has been investigated by cyclic voltammetry in 0.05 M H 2 SO 4 solution. The overall reaction has been shown to correspond to the equation. 4 Na 2 S 0 + 2 Cu(OH) 2ad →Cu 2 S ad + (4n-3) S 0 ad + 4 NaOH + 2 Na 2 S in which S o /Cu = (4n 3 1/2). Such a stoichiometry of reaction has been explained by the formation of an intermediate the adsorbed Cut II) polysulphide (Na 2 CuS n ) or a polynuclear complex (Na 2 Cu 2 S and its decomposition in simultaneous intramolecular redox reaction between Cu(II) and S 2 . When increasing n from I to 4/2-x) increases from 1.91 to 1.99 approximately.","PeriodicalId":23268,"journal":{"name":"Transactions of The Institute of Metal Finishing","volume":"77 1","pages":"37-40"},"PeriodicalIF":1.2000,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/00202967.1999.11871241","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Transactions of The Institute of Metal Finishing","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1080/00202967.1999.11871241","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ELECTROCHEMISTRY","Score":null,"Total":0}
引用次数: 5
Abstract
The composition of non-stoichiometric copper sulphide (Cu) coatings obtained during the interaction of Cu(II) with Na 2 S n (n = 1-4) has been investigated by cyclic voltammetry in 0.05 M H 2 SO 4 solution. The overall reaction has been shown to correspond to the equation. 4 Na 2 S 0 + 2 Cu(OH) 2ad →Cu 2 S ad + (4n-3) S 0 ad + 4 NaOH + 2 Na 2 S in which S o /Cu = (4n 3 1/2). Such a stoichiometry of reaction has been explained by the formation of an intermediate the adsorbed Cut II) polysulphide (Na 2 CuS n ) or a polynuclear complex (Na 2 Cu 2 S and its decomposition in simultaneous intramolecular redox reaction between Cu(II) and S 2 . When increasing n from I to 4/2-x) increases from 1.91 to 1.99 approximately.
期刊介绍：
Transactions of the Institute of Metal Finishing provides international peer-reviewed coverage of all aspects of surface finishing and surface engineering, from fundamental research to in-service applications. The coverage is principally concerned with the application of surface engineering and coating technologies to enhance the properties of engineering components and assemblies. These techniques include electroplating and electroless plating and their pre- and post-treatments, thus embracing all cleaning pickling and chemical conversion processes, and also complementary processes such as anodising. Increasingly, other processes are becoming important particularly regarding surface profile, texture, opacity, contact integrity, etc.
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