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Oxidation of propenol on nanostructured Ni and NiZn electrodes in alkaline solution
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SYSNO ASEP 0434969 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Oxidation of propenol on nanostructured Ni and NiZn electrodes in alkaline solution Author(s) Göransson, G. (SE)
Jirkovský, Jakub (UFCH-W)
Krtil, Petr (UFCH-W) RID, ORCID
Ahlberg, E. (SE)Source Title Electrochimica acta. - : Elsevier - ISSN 0013-4686
Roč. 139, SEP 2014 (2014), s. 345-355Number of pages 11 s. Language eng - English Country GB - United Kingdom Keywords electrodeposition ; DEMS ; pulse plating Subject RIV CG - Electrochemistry Institutional support UFCH-W - RVO:61388955 UT WOS 000342275200047 EID SCOPUS 84905375773 DOI https://doi.org/10.1016/j.electacta.2014.06.169 Annotation Oxidation of propenol on nanostructured pulse plated Ni and NiZn alloys in alkaline solution gives the corresponding aldehyde, propenal, as the major product. The process is redox mediated by the NiOOH/Ni(OH)(2) couple and starts as soon as NiOOH is formed on the surface. Depending on the applied potential, propenol oxidation takes place in parallel with water oxidation. The latter requires a higher surface concentration of NiOOH compared to propenol oxidation, indicating that a binuclear mechanism for oxygen evolution prevails at low overpotentials. The redox reaction of nickel oxide is markedly slower at the NiZn alloy than for solid Ni or pulse plated Ni, which also is reflected in the oxidation of water and propenol. Separation of all three oxidation currents (Ni(OH)(2), water and propenol) shows that pulse plated Ni is more efficient as catalyst than NiZn per NiOOH site, for both water and propenol oxidation. The role of Zn ions in the mixed NiZn hydroxide is discussed and a mechanism for propenol oxidation is suggested. (C) 2014 Elsevier Ltd. All rights reserved. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2015
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