A Simple Electrochemical Approach Based on Inexpensive Wall-Jet Screen-Printed Ring Disk Electrode to Evaluate Oxygen Reduction Catalysts

作者：Yang Ting Hao; Liao Chun Yen; Chang Jen Lin; Lien Chien Hung; Zen Jyh Myng^*

来源：Electroanalysis, 2009, 21(21): 2390-2394.

DOI：10.1002/elan.200904696

• Oxygen reduction reaction
• Manganese dioxide
• Ring disk electrode
• Screen-printed electrode
• Catalysts
• Oxygen

A simple electrochemical approach to evaluate oxygen reduction catalysts using an inexpensive screen-printed ring disk carbon electrode system, consisting of a ring electrode deposited with MnO(2) and a disk electrode modified with the catalysts for study, is developed in this study. The as-prepared MnO(2) is selective and sensitive for H(2)O(2) oxidation in the presence of O(2) and is crucial to the proposed approach. By coupling with a wall-jet electrochemical cell, the product generated from the reduction reaction at the disk electrode can effectively be monitored at the MnO(2)- deposited ring electrode. Model catalysts of nano-Au and nano-Pd representing 2e(-) reduction of O(2) to H(2)O(2) and 4e(-) reduction to H(2)O, respectively, were evaluated as electrode materials in oxygen reduction reaction to demonstrate the applicability of the proposed method.

• 出版日期2009-11