Electrochemical reactivity of lead chromate in carboxylic acids

✍ Scribed by A. Bennouna; B. Durand; O. Vittori

• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 477 KB
• Volume: 32
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(87)85064-8

✦ Synopsis

The electrochemical behaviour of lead chromate samples is studied by means of a cpe with conducting binder. Voltammetric curves recorded with ethanoic or methanoic acids as electrolyte and binder exhibit mainly two electrochemical steps. The first one is an irreversible process resulting from the progressive dissolution of the powdered solid as the potential is made more cathodic and from the simultaneous reduction of CrO:-ions into Crs+ rons. The shape and the potential of the connected peak are dependent on the morphology of the sample. The second one is reversible and due to the reduction of Pb2+ ions. resulting from the dissolution, into metallic lead deposited on carbon particles.