Structure and activity of Ni-Cr2O3 and Ni-Cu-Cr2O3 catalysts

Slinkin, A. A.; Fedorovskaya, A.; Pribytkova, N. A.; Rubinshtein, A. M.

doi:10.1007/bf00853887

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“…14 Moreover, ferrimagnetic Fe 3 O 4 and ferromagnetic CrO 2 were successfully composited with Cr 2 O 3 to present exchange bias effect. 15,16 Slinkin et al 17 have studied the magnetization and ferromagnetic resonance of Ni-Cr 2 O 3 composite, which was mainly used to identify the phase composition of metallic nickel in the product. However, the magnetic coupling between Ni and Cr 2 O 3 phases was not discussed in depth.…”

Section: Introductionmentioning

confidence: 99%

“…28 Previously, Ni-Cr 2 O 3 composites have been prepared by the reduction of nickel and chromium hydroxides or oxides with hydrogen. 17,22 Recently, the electrodeposition process was employed in the preparation of Ni-Cr 2 O 3 nanocomposites. 23,32 As we know, the ethylene glycol reduction method has been widely applied in the fabrication of inorganic nanostructures, including Ni and Cr 2 O 3 .…”

Section: Introductionmentioning

confidence: 99%

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The ferromagnetic–antiferromagnetic properties of Ni–Cr₂O₃composite hollow spheres prepared by an in situ reduction method

et al. 2014

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Considerable efforts have been exerted on the facile synthesis of magnetic composite materials because of their unique properties and potential applications. Especially for ferromagnetic-antiferromagnetic systems, the magnetic exchange bias effect is essential for the development of magneto-electronic switching devices and magnetic storage media. In this research, a facile ethylene glycol in situ reduction strategy has been successfully employed in the preparation of Ni-Cr 2 O 3 composite hollow spheres. X-Ray powder diffraction was used to determine the phase composition. Scanning electron microscopy and transmission electron microscopy was employed to characterize the morphologies of the as-prepared samples. Experiments proved that the volume ratio of ethylene glycol to water played a determinative role in the final morphology of the products. The magnetization vs. temperature results revealed a spin-glass-like behavior with blocking temperature of about 150 K for the as-prepared Ni-Cr 2 O 3 composites. Induced by the coupling between ferromagnetic Ni and antiferromagnetic Cr 2 O 3 , a small exchange bias effect could be observed in the magnetic hysteresis loops. At lower temperature, a larger exchange bias field and coercivity are obtained. A high surface area of 145.1 m 2 g −1 was obtained for the prepared porous hollow spheres.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The ferromagnetic–antiferromagnetic properties of Ni–Cr₂O₃composite hollow spheres prepared by an in situ reduction method

et al. 2014

View full text Add to dashboard Cite

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Structure and activity of Ni-Cr2O3 and Ni-Cu-Cr2O3 catalysts

Cited by 1 publication

References 2 publications

The ferromagnetic–antiferromagnetic properties of Ni–Cr₂O₃composite hollow spheres prepared by an in situ reduction method

The ferromagnetic–antiferromagnetic properties of Ni–Cr₂O₃composite hollow spheres prepared by an in situ reduction method

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Structure and activity of Ni-Cr2O3 and Ni-Cu-Cr2O3 catalysts

Cited by 1 publication

References 2 publications

The ferromagnetic–antiferromagnetic properties of Ni–Cr2O3composite hollow spheres prepared by an in situ reduction method

The ferromagnetic–antiferromagnetic properties of Ni–Cr2O3composite hollow spheres prepared by an in situ reduction method

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The ferromagnetic–antiferromagnetic properties of Ni–Cr₂O₃composite hollow spheres prepared by an in situ reduction method

The ferromagnetic–antiferromagnetic properties of Ni–Cr₂O₃composite hollow spheres prepared by an in situ reduction method