An improved chemical reduction route for fine nickel powders

Chan Ok Bae, Youn Hyun Kim, Jung Ho Son, Seong Ju Hwang, Young Uk Kwon, Byung Yoon Lee, Young Sic Kim

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


We report an improved chemical reduction route toward fine nickel powders by using nickel hydrazine complexes [Ni(N2H4) 3SO4 and Ni(N2H4)nCl 2 (n = 2 and 3)] as the starting materials, rather than Ni(OH) 2, which is used in the conventional procedure. The reductions of the hydrazine complexes had reaction rates that were three to ten-fold higher than those of the conventional method. As a result, the products consist of homogeneous, phase-pure, spherical, fine nickel particles that have smooth surfaces; they were formed without the need for additives or extreme reaction conditions. The reaction rates could be related to the solubilities of the precursors, which increase in the order Ni(N2H4) 2Cl2 > Ni(N2H4) 3Cl2 > Ni(N2H4) 3SO4; we propose a reaction mechanism based on this observation.

Original languageEnglish
Pages (from-to)902-910
Number of pages9
JournalJournal of Industrial and Engineering Chemistry
Issue number6
Publication statusPublished - 2005 Nov

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)


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