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dc.contributor.author | Fazleeva R.R. | |
dc.contributor.author | Nasretdinova G.R. | |
dc.contributor.author | Osin Y.N. | |
dc.contributor.author | Ziganshina A.Y. | |
dc.contributor.author | Yanilkin V.V. | |
dc.date.accessioned | 2021-02-25T20:38:00Z | |
dc.date.available | 2021-02-25T20:38:00Z | |
dc.date.issued | 2020 | |
dc.identifier.issn | 1066-5285 | |
dc.identifier.uri | https://dspace.kpfu.ru/xmlui/handle/net/162118 | |
dc.description.abstract | © 2020, Springer Science+Business Media LLC. Two-step electrosynthesis of CoO-CoO•xH2O-supported metal nanoparticles (MNPs, M = Au, Ag, Pd) was carried out in N,N-dimethylformamide in the absence and in presence of poly(N-vinylpyrrolidone) (PVP) using atmospheric oxygen as both a reagent and a mediator at potentials of its reduction to a superoxide radical anion. In the first step, oxygen reduction in the presence of Co2+ ions added to the solution as a salt or generated by dissolving the Co-anode during electrolysis produces a mixture of cobalt oxide CoO and its hydrated form CoO-CoO • xH2O (CoOxHy). When Ag+, Au+, Pd2+ ions are added to the obtained solution of CoOx H y, a redox reaction between CoO and the metal ion gives the MNPs and CoO+. In the second step, oxygen-mediated electroreduction of CoO+ serving as the second mediator is carried out, and the redox reaction is completely shifted towards the formation of MNPs. In the absence of PVP, AgNPs (18±4 nm) bind and stabilize completely in the CoOxHy matrix, PdNPs (6±1 nm) stabilize only partially, and AuNPs (21±10 nm) do not bind and, therefore, only their agglomerates are obtained (~200 nm). In the presence of PVP, individual AgNPs (5±2 nm), AuNPs (13±5 nm), PdNPs (3±1 nm) are stabilized in the PVP shell and are bound by the matrix. The obtained nanocomposites M/CoOx H y and M@PVP/CoOxHy catalyze the reduction of p-nitrophenol with sodium borohydride in an aqueous medium. Their catalytic activity is due to MNPs; CoOx H y acts as an inert matrix. | |
dc.relation.ispartofseries | Russian Chemical Bulletin | |
dc.subject | cobalt(II) oxide | |
dc.subject | electrochemical synthesis | |
dc.subject | nanocomposite | |
dc.subject | oxygen-mediated electroreduction | |
dc.title | Two-step electrosynthesis and catalytic activity of CoO−CoO • xH<inf>2</inf>O-supported Ag, Au, and Pd nanoparticles | |
dc.type | Article | |
dc.relation.ispartofseries-issue | 2 | |
dc.relation.ispartofseries-volume | 69 | |
dc.collection | Публикации сотрудников КФУ | |
dc.relation.startpage | 241 | |
dc.source.id | SCOPUS10665285-2020-69-2-SID85083111530 |