Reactivity of nanocrystalline copper oxide and its modification under magnetic field

A.Ye Yermakov; T.A. Feduschak; M.A. Uimin; A.A. Mysik; V.S. Gaviko; O.N. Chupakhin; A.B. Shishmakov; V.G. Kharchuk; L.A. Petrov; Y.A. Kotov; A.V. Vosmerikov; A.V. Korolyov

doi:10.1016/j.ssi.2004.05.014

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Reactivity of nanocrystalline copper oxide and its modification under magnetic field

Journal article

Peer reviewed

Reactivity of nanocrystalline copper oxide and its modification under magnetic field

A.Ye Yermakov, T.A. Feduschak, M.A. Uimin, A.A. Mysik, V.S. Gaviko, O.N. Chupakhin, A.B. Shishmakov, V.G. Kharchuk, L.A. Petrov, Y.A. Kotov, …

Solid state ionics, Vol.172(1), pp.317-323

31/08/2004

DOI: https://doi.org/10.1016/j.ssi.2004.05.014

Abstract

Charge phase separation

Magneto-controlled catalyst and adsorbent

Nanoparticles

Reaction rate

Reactivity

The influence of magnetic field on the rate of oxidative dehydrogenation of 2,3,5-trimetyl-1,4-hydroquinone (TMHQ) to 2,3,5-trimetyl-1,4-benzoquinone (TMBQ) with catalysts based on copper oxide nanopowders has been investigated. The initial transformation rate of TMHQ and the final product yield greatly increase after a preliminary magnetization of nanopowders. The adsorption ability of Cu-oxide-based nanopowders with respect to ammonia enhances by 1.5 after their magnetization. Physical mechanism of reactivity variation of CuO nanopowders under the influence of weak stationary external magnetic field ( H≤3 kOe) has been proposed. As a result of magnetic field influence, the ferromagnetic regions with modified spin and charge state have appeared in an antiferromagnetic CuO of nonstoichiometric composition. These regions can be new catalytic or adsorption centers.

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Title: Reactivity of nanocrystalline copper oxide and its modification under magnetic field
Creators - without role: A.Ye Yermakov - M.N. Mikheev Institute of Metal Physics
T.A. Feduschak - Institute of Petroleum Chemistry
M.A. Uimin - M.N. Mikheev Institute of Metal Physics
A.A. Mysik - M.N. Mikheev Institute of Metal Physics
V.S. Gaviko - M.N. Mikheev Institute of Metal Physics
O.N. Chupakhin - Institute of Organic Synthesis
A.B. Shishmakov - Institute of Organic Synthesis
V.G. Kharchuk - Institute of Organic Synthesis
L.A. Petrov - Institute of Organic Synthesis
Y.A. Kotov - Institute of Electrophysics
A.V. Vosmerikov - Institute of Petroleum Chemistry
A.V. Korolyov - M.N. Mikheev Institute of Metal Physics
Publication Details: Solid state ionics, Vol.172(1), pp.317-323
Publisher: Elsevier B.V
Identifiers: 9940425208331
Academic Unit: King Abdulaziz University
Language: English
Resource Type: Journal article