Improvement in activity of highly durable silica-coated Pd/CNT cathode catalysts for PEFC by addition of Cu

Sakae Takenaka, Hiroyuki Miyata, Tomoharu Tsukamoto, Hideki Matsune, Masahiro Kishida

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

1 被引用数 (Scopus)

抄録

We have previously demonstrated that silica-coated Pd cathode catalysts show high durability under severe cathode conditions in polymer electrolyte fuel cells (PEFCs), while Pd catalysts without silica-coating seriously deactivate under the same conditions due to the dissolution of Pd metal. However, the activity of silica-coated Pd catalysts for the oxygen reduction reaction (ORR) was inferior to that of Pt catalysts used in state of the art PEFCs. In the present study, the ORR activity of Pd catalysts was improved by addition of Cu. Cu-added Pd catalyst prepared with a conventional impregnation method using mixed aqueous solutions of PdCl2 and Cu(NO3)2 had an ORR activity twice that of Pd catalysts. XRD and XAFS studies showed alloy formation between Pd and Cu. Thus, Pd-Cu alloys showed higher activity for the ORR compared with Pd metal.

本文言語英語
ホスト出版物のタイトルPolymer Electrolyte Fuel Cells 12, PEFC 2012
ページ1715-1722
ページ数8
2
DOI
出版ステータス出版済み - 12 1 2012
イベント12th Polymer Electrolyte Fuel Cell Symposium, PEFC 2012 - 222nd ECS Meeting - Honolulu, HI, 米国
継続期間: 10 7 201210 12 2012

出版物シリーズ

名前ECS Transactions
番号2
50
ISSN(印刷版)1938-5862
ISSN(電子版)1938-6737

その他

その他12th Polymer Electrolyte Fuel Cell Symposium, PEFC 2012 - 222nd ECS Meeting
Country米国
CityHonolulu, HI
Period10/7/1210/12/12

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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