KFU. Card publication. Structure and catalytic activity of ultrasmall Rh, Pd and (Rh + Pd) nanoparticles obtained by mediated electrosynthesis

KAZAN
FEDERAL UNIVERSITY

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STRUCTURE AND CATALYTIC ACTIVITY OF ULTRASMALL RH, PD AND (RH + PD) NANOPARTICLES OBTAINED BY MEDIATED ELECTROSYNTHESIS

Form of presentation

Articles in international journals and collections

Year of publication

2019

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Authors, employees of KFU

Ziganshina Albina Yulduzovna, author

Bibliographic description in the original language

V. V. Yanilkin, N. V. Nastapova, G. R. Nasretdinova, Yu. N. Osin, V. G. Evtjugin, A. Yu. Ziganshina, A. T. Gubaidullin, Structure and catalytic activity of ultrasmall Rh, Pd and (Rh + Pd) nanoparticles obtained by mediated electrosynthesis // New J. Chem. – 2019. – 43. – 3931—3945.

Annotation

Efficient electrosynthesis of ultrasmall spherical mono- and bimetallic nanoparticles (NPs) of Rh and Pd stabilized in the shell of cetyltrimethylammonium chloride (CTAC) in the solution bulk was carried out by methylviologen (MV) mediated reduction of equimolar amounts of Pd(II) and Rh(III) (1.5 mM) in the presence of CTAC (10 mM) at controlled potentials of the MV2+/MV˙+ redox couple in a water/0.1 M NaCl medium at room temperature. Similar electrosynthesis of RhNPs also effectively proceeds when poly(N-vinylpyrrolidone) (10 mM) is used as a stabilizer. Metal ions are quantitatively converted to NPs upon consumption of the theoretical amount of electricity. Sizes of isolated PdNPs and RhNPs are 4.6 ? 0.9 nm and 1.7 ? 0.3 nm, respectively. Bimetallic (Pd,Rh)NPs were obtained by three procedures: (i) preliminary synthesis of RhNPs followed by reduction of Pd(II) ((Rh/Pd)NPs, 2.2 ? 0.7 nm); (ii) preliminary synthesis of PdNPs followed by reduction of Rh(III) ((Pd/Rh)NPs, 4.9 ? 1.0 nm); (iii) joint reduction of Pd(II) and Rh(III) ((Pd–Rh)NPs, 3.1 ? 0.5 nm). In all cases, solid-solution alloy (Pd,Rh)NPs are obtained. In an aqueous medium, all the NPs obtained are catalytically active in the hydrogenation of p-nitrophenol with sodium borohydride to p-aminophenol, but their use in the Suzuki coupling reaction of iodobenzene with phenylboronic acid does not lead to the target product. An increase in the CTAC concentration by 7.5 times leads to an increase in the catalytic activity of PdNPs in both types of reactions.

Keywords

palladium nanoparticle

The name of the journal

NEW JOURNAL OF CHEMISTRY

URL

https://pubs.rsc.org/en/content/articlelanding/2019/NJ/C8NJ06233A

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=262891&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Ziganshina Albina Yulduzovna	ru_RU
dc.date.accessioned	2019-01-01T00:00:00Z	ru_RU
dc.date.available	2019-01-01T00:00:00Z	ru_RU
dc.date.issued	2019	ru_RU
dc.identifier.citation	V. V. Yanilkin, N. V. Nastapova, G. R. Nasretdinova, Yu. N. Osin, V. G. Evtjugin, A. Yu. Ziganshina, A. T. Gubaidullin, Structure and catalytic activity of ultrasmall Rh, Pd and (Rh + Pd) nanoparticles obtained by mediated electrosynthesis // New J. Chem. – 2019. – 43. – 3931—3945.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=262891&p_lang=2	ru_RU
dc.description.abstract	NEW JOURNAL OF CHEMISTRY	ru_RU
dc.description.abstract	Efficient electrosynthesis of ultrasmall spherical mono- and bimetallic nanoparticles (NPs) of Rh and Pd stabilized in the shell of cetyltrimethylammonium chloride (CTAC) in the solution bulk was carried out by methylviologen (MV) mediated reduction of equimolar amounts of Pd(II) and Rh(III) (1.5 mM) in the presence of CTAC (10 mM) at controlled potentials of the MV2+/MV˙+ redox couple in a water/0.1 M NaCl medium at room temperature. Similar electrosynthesis of RhNPs also effectively proceeds when poly(N-vinylpyrrolidone) (10 mM) is used as a stabilizer. Metal ions are quantitatively converted to NPs upon consumption of the theoretical amount of electricity. Sizes of isolated PdNPs and RhNPs are 4.6 ? 0.9 nm and 1.7 ? 0.3 nm, respectively. Bimetallic (Pd,Rh)NPs were obtained by three procedures: (i) preliminary synthesis of RhNPs followed by reduction of Pd(II) ((Rh/Pd)NPs, 2.2 ? 0.7 nm); (ii) preliminary synthesis of PdNPs followed by reduction of Rh(III) ((Pd/Rh)NPs, 4.9 ? 1.0 nm); (iii) joint reduction of Pd(II) and Rh(III) ((Pd–Rh)NPs, 3.1 ? 0.5 nm). In all cases, solid-solution alloy (Pd,Rh)NPs are obtained. In an aqueous medium, all the NPs obtained are catalytically active in the hydrogenation of p-nitrophenol with sodium borohydride to p-aminophenol, but their use in the Suzuki coupling reaction of iodobenzene with phenylboronic acid does not lead to the target product. An increase in the CTAC concentration by 7.5 times leads to an increase in the catalytic activity of PdNPs in both types of reactions.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject		ru_RU
dc.title	Structure and catalytic activity of ultrasmall Rh, Pd and (Rh + Pd) nanoparticles obtained by mediated electrosynthesis	ru_RU
dc.type	Articles in international journals and collections	ru_RU