An electrodeposited Pd-Co cathode catalyst for a microfabricated direct methanol fuel cell

S. Tominaka, S. Ohta, T. Momma, T. Osaka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Citations (Scopus)

Abstract

Pd-Co was electrodeposited as a rough cathode catalyst for a direct methanol fuel cell fabricated using micro-electromechanical systems technology. Pd-Co was electrodeposited at -10 mA/cm2 for 60 s or -200 mA/cm 2 for 5 s. The deposits were evaluated with respect to microstructures, electrochemical characteristics, and fuel cell performances. As a result, oxygen reduction activity of the sample prepared at -200 mA/cm 2 was higher than that prepared at 10 mA/cm , while the electrochemically active surface areas were almost the same. Microstructures of the former and the latter were observed dendritic and flat, respectively. We conclude that the difference of oxygen reduction activity is attributed to the difference of the microstructure. In addition, we modified the dendritic sample by depositing Pd-Co at -0.75 V vs. Ag/AgCl. The modification increased open circuit potential for oxygen reduction by 30 mV from 0.70 to 0.73 V.

Original languageEnglish
Title of host publicationECS Transactions - 7th Symposium Devoted to Proton Exchange Membrane Fuel Cells
Pages1369-1377
Number of pages9
Edition1 PART 2
DOIs
Publication statusPublished - 2007 Dec 1
Event7th Symposium Devoted to Proton Exchange Membrane Fuel Cells - 212th ECS Meeting - Washington, DC, United States
Duration: 2007 Oct 72007 Oct 12

Publication series

NameECS Transactions
Number1 PART 2
Volume11
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Conference

Conference7th Symposium Devoted to Proton Exchange Membrane Fuel Cells - 212th ECS Meeting
CountryUnited States
CityWashington, DC
Period07/10/707/10/12

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Tominaka, S., Ohta, S., Momma, T., & Osaka, T. (2007). An electrodeposited Pd-Co cathode catalyst for a microfabricated direct methanol fuel cell. In ECS Transactions - 7th Symposium Devoted to Proton Exchange Membrane Fuel Cells (1 PART 2 ed., pp. 1369-1377). (ECS Transactions; Vol. 11, No. 1 PART 2). https://doi.org/10.1149/1.2781049