Encapsulation of nickel nanoparticles in carbon obtained by the sonochemical decomposition of Ni(C8H12)2

Yuri Koltypin, Asuncion Fernandez, T. Cristina Rojas, Juan Campora, Pilar Palma, Ruslan Prozorov, Aharon Gedanken

Research output: Contribution to journalArticlepeer-review

94 Scopus citations

Abstract

A new precursor for the sonochemical preparation of amorphous nickel, Ni(cyclooctadiene)2, yielded relatively large (200 nm) amorphous nanoparticles composed of nickel and carbon atoms. Small nickel particles were dispersed all over the particle. When these particles were heated slightly above their crystallization temperature, much smaller particles (5 nm) of encapsulated crystalline nickel in amorphous carbon were obtained. The XPS spectrum reveals that the crystallization process is also accompanied by the reduction of the surface Ni2+ions by the amorphous carbon atoms. The DSC measurements substantiate this assumption.

Original languageEnglish
Pages (from-to)1331-1335
Number of pages5
JournalChemistry of Materials
Volume11
Issue number5
DOIs
StatePublished - 1999

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