期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 13, 期 1, 页码 68-71出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2010.11.015
关键词
Modified electrodes; Gold nanoparticles; Electron-transfer reactions; Textile; Paper; Catalyst support; Seed-mediated growth method; Voltammetry; Impedance; Contact-electrocatalysis
资金
- Ministry of Education, Culture, Science, Sports and Technology, Japan [20550074]
- Grants-in-Aid for Scientific Research [20550074] Funding Source: KAKEN
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. (C) 2010 Elsevier B.V. All rights reserved.
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