Electrochemical synthesis of metal nanoparticles using a polymeric mediator, whose reduced form is adsorbed (deposited) on an electrode

V. V. Yanilkin; N. V. Nastapova; R. R. Fazleeva; G. R. Nasretdinova; E. D. Sultanova; A. Yu. Ziganshina; A. T. Gubaidullin; A. I. Samigullina; V. G. Evtugin; V. V. Vorobev; Yu. N. Osin

doi:10.1007/s11172-018-2062-2

Electrochemical synthesis of metal nanoparticles using a polymeric mediator, whose reduced form is adsorbed (deposited) on an electrode

Authors: Yanilkin V.V.¹, Nastapova N.V.¹, Fazleeva R.R.¹, Nasretdinova G.R.¹, Sultanova E.D.¹, Ziganshina A.Y.¹, Gubaidullin A.T.¹, Samigullina A.I.¹, Evtugin V.G.², Vorobev V.V.², Osin Y.N.²
Affiliations:
1. A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center of the Russian Academy of Sciences
2. Kazan (Volga Region) Federal University
Issue: Vol 67, No 2 (2018)
Pages: 215-229
Section: Full Articles
URL: https://journals.rcsi.science/1066-5285/article/view/242084
DOI: https://doi.org/10.1007/s11172-018-2062-2
ID: 242084

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Abstract

Efficient mediated electrosynthesis of nanocomposite Au@р(MVCA⁸⁺-co-St) (~6 nm), in which ultrasmall Au nanoparticles (Au-NP) were bound in nanocapsules of water-soluble nanoparticles of соpolymer р(MVCA⁸⁺-co-St) of tetraviologen calix[4]resorcinol (MVCA⁸⁺) with styrene (St), was accomplished by the reduction of Au^I in aqueous medium. The quanti- tative reduction of Au^I was carried out using the theoretically necessary amount of electricity and was not accompanied by the deposition of metal on the electrode. Radical cations of viologen units MV^•+ of the molecule р(MVCA^4•+-co-St) adsorbed on the electrode and π-dimers MV^•+···MV^•+ of π-polymers [р(MVCA^4•+-co-St)]_n deposited on the electrode act- ed as the reducing agents with respect to Au^I. During electrolysis, the nanoparticles agglo- merated to 37—50 nm. The nanocomposite particles dispersed in ethanol had sizes of 72±16 nm and also contained Au-NP with sizes of 51±8 and 19±3 nm. The catalytic activity of the nanocomposite in the reduction of p-nitrophenol with sodium borohydride was demon- strated. A similar reduction of AgCl nanoparticles (~250 nm) led to the formation of silver nanoparticles with crystallite sizes in the range of 7—11 nm, the process was inefficient, however, even when using 250% of electricity, an incomplete reduction of AgCl was still observed.

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Electrochemical synthesis of metal nanoparticles using a polymeric mediator, whose reduced form is adsorbed (deposited) on an electrode

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