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

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

*この研究の対応する著者

研究成果: Conference contribution

11 被引用数 (Scopus)

抄録

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.

本文言語English
ホスト出版物のタイトルECS Transactions - 7th Symposium Devoted to Proton Exchange Membrane Fuel Cells
ページ1369-1377
ページ数9
1 PART 2
DOI
出版ステータスPublished - 2007 12 1
イベント7th Symposium Devoted to Proton Exchange Membrane Fuel Cells - 212th ECS Meeting - Washington, DC, United States
継続期間: 2007 10 72007 10 12

出版物シリーズ

名前ECS Transactions
番号1 PART 2
11
ISSN(印刷版)1938-5862
ISSN(電子版)1938-6737

Conference

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

ASJC Scopus subject areas

  • 工学(全般)

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