INVESTIGATION OF PLATINUM-CATALYZED FORMATION OF COBALT NANOPARTICLES BY MIXED POTENTIAL

Authors

  • Mary Donnabelle Lirio Balela-Garcia Department of Mining, Metallurgical and Materials Engineering, University of the Philippines
  • Shunsuke Yagi Nanoscience and Nanotechnology Research Center, Osaka Prefecture University
  • Eiichiro Matsubara Department of Materials Science and Engineering, Kyoto University

DOI:

https://doi.org/10.11113/aej.v4.15428

Abstract

Cobalt (Co) nanoparticles with diameters of 20 to 60 nm were successfully formed by seed-mediated electroless deposition in aqueous solution at room temperature. The formation of Co nanoparticles was investigated by in situ monitoring of mixed potential and deposition rate. Co nanoparticles was produced when the mixed potential was below the oxidation-reduction potential of Co(II)/Co, which coincided with a sharp increase in deposited mass on a gold-sputtered quartz crystal substrate. The mixed potential was positive and Co nanoparticles were not produced without platinum (Pt) addition. Increasing concentration of Pt addition resulted in a decrease in mixed potential and Co nanoparticle diameter. Thus, Pt effectively enhanced Co deposition rate and served as nucleation seeds for Co nanoparticles.

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Published

2014-02-17

Issue

Vol. 4 No. 1 (2015): June 2015 Part B

Section

Materials Engineering

How to Cite

INVESTIGATION OF PLATINUM-CATALYZED FORMATION OF COBALT NANOPARTICLES BY MIXED POTENTIAL. (2014). ASEAN Engineering Journal, 4(1), 66-73. https://doi.org/10.11113/aej.v4.15428