Effect of pH on the spontaneous synthesis of palladium nanoparticles on reduced graphene oxide

Xiaorui Zhang, Wataru Ooki, Yoshinori R. Kosaka, Akinori Okonogi, Galina Marzun, Philipp Wagener, Stephan Barcikowski, Takahiro Kondo, Junji Nakamura

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Palladium (Pd) nanoparticles were spontaneously deposited on reduced graphene oxide (rGO) without any external reducing agents. The prepared Pd/rGO composites were then characterized by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Spontaneous deposition occurred because of a redox reaction between the Pd precursor and rGO, which involved reduction of bivalent Pd to metallic Pd 0 and oxidation of the sp 2 carbon of rGO to oxygen-containing functional groups. The amount of Pd deposited on rGO varied with pH, and this was attributed to electrostatic interactions between the Pd precursor and rGO based on the results of zeta potential measurements. The importance of the redox reaction in the spontaneous deposition was demonstrated in the experiment with Zn, Ni, Cu, Ag, Pt, Pd, and Au.

Original languageEnglish
Pages (from-to)911-915
Number of pages5
JournalApplied Surface Science
Volume389
DOIs
Publication statusPublished - Dec 15 2016
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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