Bimodal nanoporous platinum on sacrificial nanoporous copper for catalysis of the oxygen-reduction reaction. (22nd November 2018)

• Record Type: Journal Article
• Authors: Hakamada, Masataka; Sato, Yuto; Mabuchi, Mamoru
• Is Part Of: MRS communications. Volume 9:Number 1(2019)
• Page Start: 292
• Page End: 297
• Publication Date: 2018-11-22
• Subjects: Materials -- Periodicals; 620.11
• DOI: 10.1557/mrc.2018.223
• Languages: English
• ISSNs: 2159-6859

Abstract

Abstract: 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.