Paper supports in electrocatalysis: Weak contact catalysis with seed-mediated grown gold nanoparticle deposits

M Oyama, D Nakashima, Charles Y Cummings, Frank Marken

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Paper surfaces (Whatman filter papers, Kimwipes (R), and Japanese Washi papers) were employed as support for gold nanoparticles (AuNPs) deposited by the seed-mediated growth method. The AuNP-modified paper or textile was brought into "weak" (or non-permanent) contact with a glassy carbon electrode and immersed into aqueous electrolyte media. Electrochemical responses for the Fe(CN)(6)(4-)/Fe(CN)(6)(3-) redox system in 0.1 M phosphate buffer (pH 7.0) and 1.0 M KCl solutions were investigated by voltammetry and impedance methods. Even for weakly contacted AuNP catalysts of relatively low density faster electron transfer was observed. Particle sizes of at least 20 nm diameter were required. There was no permanent contact from AuNP catalysts to the electrode and the process was therefore termed "weak contact catalysis". The method is proposed as a rapid and novel catalyst screening tool with potential applications in fuel cell and sensor technologies.
Original languageEnglish
Pages (from-to)68-71
Number of pages4
JournalElectrochemistry Communications
Volume13
Issue number1
DOIs
Publication statusPublished - Jan 2011

Keywords

  • catalyst support
  • gold nanoparticles
  • voltammetry
  • paper
  • contact-electrocatalysis
  • seed-mediated growth method
  • electron-transfer reactions
  • modified electrodes
  • impedance
  • textile

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