Methanol oxidation as anode reaction in zinc electrowinning
2004 (English)In: Electrode Processes VII / [ed] Birss, Evans, Josowicz and Osawa, 2004, 264-275 p.Conference paper (Refereed)
The lead anodes used in zinc electrowinning today are not dimensionally stable and have a high overvoltage for oxygen evolution. By replacing the oxygen evolution in sulphate based electrolytes with methanol oxidation the anode potential could be lowered significantly. This would reduce the energy consumption and also enable the use of new and more stable types of electrodes. In this study, different types of electrodes were compared regarding their activity and stability for methanol oxidation in a zinc electrowinning environment. The activities of the electrodes studied were sufficient for electrowinning processes. The highest activity was obtained with porous PtRu, but platinised titanium was the most stable electrode. All electrodes were deactivated with time and the deactivation mechanism seemed to differ between Pt and PtRu. The best method for reactivation was to periodically reverse the current. The platinised titanium electrode was considered to be most suitable for use in electrowinning processes.
Place, publisher, year, edition, pages
2004. 264-275 p.
, The Electrochemical Society Proceedings Series, PV200418
IdentifiersURN: urn:nbn:se:kth:diva-88001ScopusID: 2-s2.0-31744451124ISBN: 978-1-56677-473-4OAI: oai:DiVA.org:kth-88001DiVA: diva2:502071
206th ECS Meeting; Honolulu, HI; 3 October 2004 through 8 October 2004
QC 201202242012-02-142012-02-142012-02-24Bibliographically approved