TY - JOUR
T1 - Microstructural analysis of catalyst/catalyst support interfaces of PEFC electrocatalysts
AU - Chou, J. T.
AU - Sasaki, K.
N1 - Funding Information:
This study was mainly supported by the JST-CREST project. We thank Prof. Dr. I. Mochida for supplying CNFs and for helpful suggestions. The financial support to J. -T. Chou by the 21th-century COE program by MEXT, Japan is also gratefully acknowledged.
PY - 2008/9/30
Y1 - 2008/9/30
N2 - In this study, we observed the catalyst/catalyst support interfaces of Polymer Electrolyte Fuel Cell (PEFC) electrocatalysts by High-Resolution TEM. As the catalyst supports, various carbon nanofibers, including VGCF (Vapor-grown carbon fibers), Platelet type carbon nanofibers and Herringbone-type carbon nanofibers, were applied. We found larger Platinum particles in the Pt/VGCF. The interfacial structure was identified to be the (111)Pt//(0001)Graphite, so that its boundary is relatively stable, whereas particle growth could easily occur. On the contrary, in the Pt/Platelet and in the Pt/Herringbone, well-dispersed Platinum particles were observed, as the catalyst/catalyst support interface is rather unstable. Moreover, twin was observed in the Platinum particles supported on the Herringbone-type nanofibers.
AB - In this study, we observed the catalyst/catalyst support interfaces of Polymer Electrolyte Fuel Cell (PEFC) electrocatalysts by High-Resolution TEM. As the catalyst supports, various carbon nanofibers, including VGCF (Vapor-grown carbon fibers), Platelet type carbon nanofibers and Herringbone-type carbon nanofibers, were applied. We found larger Platinum particles in the Pt/VGCF. The interfacial structure was identified to be the (111)Pt//(0001)Graphite, so that its boundary is relatively stable, whereas particle growth could easily occur. On the contrary, in the Pt/Platelet and in the Pt/Herringbone, well-dispersed Platinum particles were observed, as the catalyst/catalyst support interface is rather unstable. Moreover, twin was observed in the Platinum particles supported on the Herringbone-type nanofibers.
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U2 - 10.1016/j.ssi.2008.04.011
DO - 10.1016/j.ssi.2008.04.011
M3 - Article
AN - SCOPUS:48349130133
VL - 179
SP - 1405
EP - 1408
JO - Solid State Ionics
JF - Solid State Ionics
SN - 0167-2738
IS - 27-32
ER -