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

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

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationPolymer Electrolyte Fuel Cells 12, PEFC 2012
Pages1715-1722
Number of pages8
Edition2
DOIs
Publication statusPublished - Dec 1 2012
Event12th Polymer Electrolyte Fuel Cell Symposium, PEFC 2012 - 222nd ECS Meeting - Honolulu, HI, United States
Duration: Oct 7 2012Oct 12 2012

Publication series

NameECS Transactions
Number2
Volume50
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other12th Polymer Electrolyte Fuel Cell Symposium, PEFC 2012 - 222nd ECS Meeting
CountryUnited States
CityHonolulu, HI
Period10/7/1210/12/12

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All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Takenaka, S., Miyata, H., Tsukamoto, T., Matsune, H., & Kishida, M. (2012). Improvement in activity of highly durable silica-coated Pd/CNT cathode catalysts for PEFC by addition of Cu. In Polymer Electrolyte Fuel Cells 12, PEFC 2012 (2 ed., pp. 1715-1722). (ECS Transactions; Vol. 50, No. 2). https://doi.org/10.1149/05002.1715ecst