KFU. Card publication. Methylviologen mediated electrochemical synthesis of catalytically active ultrasmall bimetallic PdAg nanoparticles stabilized by CTAC

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METHYLVIOLOGEN MEDIATED ELECTROCHEMICAL SYNTHESIS OF CATALYTICALLY ACTIVE ULTRASMALL BIMETALLIC PDAG NANOPARTICLES STABILIZED BY CTAC

Form of presentation

Articles in international journals and collections

Year of publication

2018

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Authors, employees of KFU

Ziganshina Albina Yulduzovna, author

Bibliographic description in the original language

G. R. Nasretdinova, R. R. Fazleeva, Yu. N. Osin, V. G. Evtjugin, A. T. Gubaidullin, A. Yu. Ziganshina, V. V. Yanilkin, Methylviologen mediated electrochemical synthesis of catalytically active ultrasmall bimetallic PdAg nanoparticles stabilized by CTAC // Electrochimica Acta. – 2018. – 285. – 149-163.

Annotation

Efficient electrosynthesis of the monodisperse ultrasmall spherical mono- and bimetallic nanoparticles (NP) of Ag and Pd stabilized in the CTAC shell in solution bulk was carried out by methylviologen mediated reduction of equimolar amounts of Pd(II) and Ag(I) (1.5 mM) in the presence of CTAC (75 mM) at controlled potentials of the MV2+/MV?+ redox couple in water/0.1 M NaCl medium at room temperature. Metal ions are quantitatively converted to NP upon consumption of the theoretical amount of electricity. Sizes of isolated PdNP and AgNP are 5 ? 1 nm and 18 ? 5 nm, respectively. Bimetallic PdAgNP were obtained in three ways: (i) by preliminary synthesis of PdNP and subsequent reduction of AgCl (Pd/AgNP); (ii) by preliminary synthesis of AgNP and subsequent reduction of PdCl2 (Ag/PdNP); (iii) by joint reduction of PdCl2 and AgCl (Ag-PdNP). In all cases, a solid-solution alloy PdAgNP is obtained. The driving force for the alloy formation is the energy gain of ∼33 kJ/mol of an alloy. In the first way, the NP size (8 ? 2 nm) and the Pd content in the alloy (76%) are slightly higher than in the other two methods (6 ? 1 nm, 50 and 68%), but the alloy crystallite size (2–5 nm) in NP is the same. PdNP and alloys NP exhibit a high catalytic activity toward the p-nitrophenol reduction and the Suzuki-Miyaura cross-coupling reactions. In the reduction reaction, an addition of silver to palladium decreases the catalytic activity of NP. The catalytic activity of alloys in the coupling reaction correlates with the Pd content in an alloy. And the catalytic activity of the alloy Pd/AgNP obtained in the first method of the NP preparation is higher than that of PdNP.

Keywords

palladiun nanoparticle, silver nanoparticle, viologen

The name of the journal

ELECTROCHIMICA ACTA

URL

https://www.sciencedirect.com/science/article/abs/pii/S0013468618316104?via%3Dihub

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

https://repository.kpfu.ru/eng/?p_id=262895&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Ziganshina Albina Yulduzovna	ru_RU
dc.date.accessioned	2018-01-01T00:00:00Z	ru_RU
dc.date.available	2018-01-01T00:00:00Z	ru_RU
dc.date.issued	2018	ru_RU
dc.identifier.citation	G. R. Nasretdinova, R. R. Fazleeva, Yu. N. Osin, V. G. Evtjugin, A. T. Gubaidullin, �. Yu. Ziganshina, V. V. Yanilkin, Methylviologen mediated electrochemical synthesis of catalytically active ultrasmall bimetallic PdAg nanoparticles stabilized by CTAC // Electrochimica Acta. – 2018. – 285. – 149-163.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=262895&p_lang=2	ru_RU
dc.description.abstract	ELECTROCHIMICA ACTA	ru_RU
dc.description.abstract	Efficient electrosynthesis of the monodisperse ultrasmall spherical mono- and bimetallic nanoparticles (NP) of Ag and Pd stabilized in the CTAC shell in solution bulk was carried out by methylviologen mediated reduction of equimolar amounts of Pd(II) and Ag(I) (1.5 mM) in the presence of CTAC (75 mM) at controlled potentials of the MV2+/MV?+ redox couple in water/0.1 M NaCl medium at room temperature. Metal ions are quantitatively converted to NP upon consumption of the theoretical amount of electricity. Sizes of isolated PdNP and AgNP are 5 ? 1 nm and 18 ? 5 nm, respectively. Bimetallic PdAgNP were obtained in three ways: (i) by preliminary synthesis of PdNP and subsequent reduction of AgCl (Pd/AgNP); (ii) by preliminary synthesis of AgNP and subsequent reduction of PdCl2 (Ag/PdNP); (iii) by joint reduction of PdCl2 and AgCl (Ag-PdNP). In all cases, a solid-solution alloy PdAgNP is obtained. The driving force for the alloy formation is the energy gain of ∼33 kJ/mol of an alloy. In the first way, the NP size (8 ? 2 nm) and the Pd content in the alloy (76%) are slightly higher than in the other two methods (6 ? 1 nm, 50 and 68%), but the alloy crystallite size (2–5 nm) in NP is the same. PdNP and alloys NP exhibit a high catalytic activity toward the p-nitrophenol reduction and the Suzuki-Miyaura cross-coupling reactions. In the reduction reaction, an addition of silver to palladium decreases the catalytic activity of NP. The catalytic activity of alloys in the coupling reaction correlates with the Pd content in an alloy. And the catalytic activity of the alloy Pd/AgNP obtained in the first method of the NP preparation is higher than that of PdNP.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	palladiun nanoparticle	ru_RU
dc.subject	silver nanoparticle	ru_RU
dc.subject	viologen	ru_RU
dc.title	Methylviologen mediated electrochemical synthesis of catalytically active ultrasmall bimetallic PdAg nanoparticles stabilized by CTAC	ru_RU
dc.type	Articles in international journals and collections	ru_RU