The effect of concentration on the galvanostatic pulse deposition of PtRu

Yu Far Chiu*, Li Chung Chang, Pu-Wei Wu, Yu Chi Hsieh

*Corresponding author for this work

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

Abstract

Fabrication of PtRu nanoparticles was conducted by a galvanoslatic pulse electrodeposition technique. We studied various deposition parameters including current on-time and off-time, current density, as well as concentrations for the Pt and Ru precursors in the plating bath in order to determine the optimized process condition for the highest methanol oxidation ability. Cyclic voltammetric profiles were obtained in electrolytes of 0.5 M H 2 SO 4 , and mixture of 0.5 M H 2 SO 4 and 1.0 M CH 3 OH to determine characteristics in the hydrogen absorption/desorption and peak currents in the anodic/cathodic scans. We observed that a shorter current off-time resulted in better catalytic abilities when the Pt precursor concentration was increased. Partial dissolution of Ru in the as-deposited PtRu nanoparticles during the current off-time might be responsible.

Original languageEnglish
Title of host publicationECS Transactions - Proton Exchange Membrane Fuel Cells 8
Pages901-911
Number of pages11
Edition2 PART 1
DOIs
StatePublished - 1 Dec 2008
EventProton Exchange Membrane Fuel Cells 8, PEMFC - 214th ECS Meeting - Honolulu, HI, United States
Duration: 12 Oct 200817 Oct 2008

Publication series

NameECS Transactions
Number2 PART 1
Volume16
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Conference

ConferenceProton Exchange Membrane Fuel Cells 8, PEMFC - 214th ECS Meeting
CountryUnited States
CityHonolulu, HI
Period12/10/0817/10/08

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