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Oxidation of propenol on nanostructured Ni and NiZn electrodes in alkaline solution
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SYSNO ASEP 0434969 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Oxidation of propenol on nanostructured Ni and NiZn electrodes in alkaline solution Tvůrce(i) Göransson, G. (SE)
Jirkovský, Jakub (UFCH-W)
Krtil, Petr (UFCH-W) RID, ORCID
Ahlberg, E. (SE)Zdroj.dok. Electrochimica acta. - : Elsevier - ISSN 0013-4686
Roč. 139, SEP 2014 (2014), s. 345-355Poč.str. 11 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova electrodeposition ; DEMS ; pulse plating Vědní obor RIV CG - Elektrochemie Institucionální podpora UFCH-W - RVO:61388955 UT WOS 000342275200047 EID SCOPUS 84905375773 DOI https://doi.org/10.1016/j.electacta.2014.06.169 Anotace 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. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2015
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