Highly durable Pd metal catalysts for the oxygen reduction reaction in fuel cells; coverage of Pd metal with silica.
Pd cathode catalysts for polymer electrolyte fuel cells have been covered with silica layers a few nanometres thick. The silica-coated Pd catalysts showed high activity and excellent durability for the oxygen reduction under the severe cathode conditions of PEFCs, while Pd catalysts without silica-coating were seriously deactivated under the same conditions. The coverage of Pd metal with silica prevents the diffusion of Pd species out of the silica layers.
Takenaka
Sakae
S
Department of Chemical Engineering, Graduate School of Engineering, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan. takenaka@chem-eng.kyushu-u.ac.jp
Susuki
Naoto
N
Miyamoto
Hiroaki
H
Tanabe
Eishi
E
Matsune
Hideki
H
Kishida
Masahiro
M