Morphology-controlled synthesis of ternary Pt-Pd-Cu alloy nanoparticles for efficient electrocatalytic oxygen reduction reactions

Title
Morphology-controlled synthesis of ternary Pt-Pd-Cu alloy nanoparticles for efficient electrocatalytic oxygen reduction reactions
Authors
류재윤최정훈임동희서혜린이상영손연선박진후장종현김형준홍성안김필유성종
Keywords
Oxygen reduction reaction; Electrocatalysis; Ternay alloy nanoparticles; Morphology control; Galvanic displacement reaction
Issue Date
2015-09
Publisher
Applied catalysis B, Environmental
Citation
VOL 174-175, 526-532
Abstract
In the present work, we have accomplished morphology-controlled synthesis of ternary Pt–Pd–Cu alloy nanoparticles, particularly for efficient electrocatalytic oxygen reduction reactions. By controlling over the degree of galvanic displacement at room temperature, we selectively introduced porous and hollow architectures into Pt-decorated Pd–Cu alloy nanoparticles. Porous morphology was accompanied with partially facilitated Pt substitution reaction while hollow shape was exclusively achieved when the galvanic reaction was coupled with additional pre-treatment process which could eventually make the following displacement reaction more facile. Not only the both porous and hollow Pt@PdCu/C catalysts exhibited enhanced ORR performances compared to commercial Pt/C, but also they displayed outstanding durability. In addition, we investigated the alloying effects between Pt and Pd–Cu composite and the presumable influences of lattice strain through preliminary theoretical calculation to account for the enhanced ORR efficiency and durability of the present catalysts.
URI
http://pubs.kist.re.kr/handle/201004/49675
ISSN
09263373
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KIST Publication > Article
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