Facile surface functionalization of carbon/nafion for enhancement of methanol electro-oxidation

Yu Chi Hsieh, Li Chung Chang, Pu-Wei Wu*, Jyh Fu Lee, Chen Hong Liao

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

We report a facile electrochemical method to produce functional groups on the carbon surface in which multiple cyclic voltammetric (CV) sweeps are imposed in 0.5 M H2SO4 electrolyte on the samples containing carbon cloth, Vulcan XC72R, and Nafion ionomer. With supply of ambient O 2, the generation of radicals from the oxygen reduction and Nafion ionomer degradation enables an accelerated formation of oxygenated functional groups on the carbon surface. Raman analysis reveals structural variation for the carbon electrodes after CV modifications. X-ray photoelectron spectroscopy confirms the alteration of carbon structure in conjunction with notable increase of oxygenated groups and reduction in fluorine amount. The functionalized electrodes allow a 250% increment for PtRu electrodeposition as compared to the reference sample. We carry out electrochemical measurements on methanol electro-oxidation for the PtRu samples. The functionalized electrode demonstrates significant improvement in apparent current density and mass activity as opposed to the reference sample.

Original languageEnglish
Title of host publicationPolymer Electrolyte Fuel Cells 10, PEFC 10
Pages2017-2026
Number of pages10
Edition1 PART 2
DOIs
StatePublished - 1 Dec 2010
Event10th Polymer Electrolyte Fuel Cell Symposium, PEFC 10 - 218th ECS Meeting - Las Vegas, NV, United States
Duration: 10 Oct 201015 Oct 2010

Publication series

NameECS Transactions
Number1 PART 2
Volume33
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Conference

Conference10th Polymer Electrolyte Fuel Cell Symposium, PEFC 10 - 218th ECS Meeting
CountryUnited States
CityLas Vegas, NV
Period10/10/1015/10/10

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