Highly durable carbon nanotube-supported Pd cathode catalysts covered with silica layers for polymer electrolyte fuel cells: Effect of silica layer thickness on the catalytic performance

Sakae Takenaka, Hiroaki Miyamoto, Naoto Susuki, Hideki Matsune, Masahiro Kishida

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

1 Citation (Scopus)

Abstract

Carbon nanotube-supported Pd catalyst (Pd/CNT) was covered with silica layers a few nanometers thick by successive hydrolysis of 3- aminopropyltriethoxysilane (APTES) and tetraethoxysilane (TEOS) to improve the durability of the Pd catalyst under cathode conditions of polymer electrolyte fuel cells (PEFCs). The coverage with silica layers resulted in the improvement of durability of Pd/CNT during the potential cycling between 0.05 and 1.20 V (vs. RHE) in aqueous HClO 4 electrolyte. The catalytic activity and durability of silica-coated Pd/CNT strongly depended on silica layer thickness in the catalysts. The coverage with thicker silica layers improved the durability of Pd/CNT but the catalytic activity of the catalysts for the oxygen reduction reaction became lower with silica layer thickness. The coverage of Pd/CNT with silica layers of ca. 3 nm thickness is preferable from a viewpoint of the catalytic activity and durability.

Original languageEnglish
Title of host publicationPolymer Electrolyte Fuel Cells 11
Pages2305-2312
Number of pages8
Edition1
DOIs
Publication statusPublished - Dec 1 2011
Event11th Polymer Electrolyte Fuel Cell Symposium, PEFC 11 - 220th ECS Meeting - Boston, MA, United States
Duration: Oct 9 2011Oct 14 2011

Publication series

NameECS Transactions
Number1
Volume41
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other11th Polymer Electrolyte Fuel Cell Symposium, PEFC 11 - 220th ECS Meeting
CountryUnited States
CityBoston, MA
Period10/9/1110/14/11

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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