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Bimodal nanoporous platinum on sacrificial nanoporous copper for catalysis of the oxygen-reduction reaction

Published online by Cambridge University Press:  22 November 2018

Masataka Hakamada ,
Yuto Sato  and
Mamoru Mabuchi
Masataka Hakamada*
Affiliation:
Department of Energy Science and Technology, Graduate School of Energy Science, Kyoto University, Yoshidahonmachi, Sakyo, 606-8501 Kyoto, Japan
Yuto Sato
Affiliation:
Department of Energy Science and Technology, Graduate School of Energy Science, Kyoto University, Yoshidahonmachi, Sakyo, 606-8501 Kyoto, Japan
Mamoru Mabuchi
Affiliation:
Department of Energy Science and Technology, Graduate School of Energy Science, Kyoto University, Yoshidahonmachi, Sakyo, 606-8501 Kyoto, Japan
*
Address all correspondence to Masataka Hakamada at hakamada.masataka.3x@kyoto-u.ac.jp
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Abstract

Bimodal nanoporous platinum (BNP-Pt) is synthesized by using a sacrificial nanoporous copper (NP-Cu) support for oxygen-reduction-reaction (ORR) catalysts in fuel cells. The specific ORR catalytic activity of BNP-Pt increases by the dissolution and removal of supporting NP-Cu, suggesting that the BNP structure improves the intrinsic catalytic properties of platinum. The lattice contraction of BNP-Pt containing residual copper even after NP-Cu removal is milder than predicted by Vegard's law. The BNP structure governs the intrinsic catalytic activity of the platinum by relaxing the lattice contraction and by alloying with copper and/or misfit strain at the Pt/Cu interface.

Type
Research Letters
Information
MRS Communications , Volume 9 , Issue 1 , March 2019 , pp. 292 - 297
Copyright
Copyright © Materials Research Society 2018 

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