Journal
ACS NANO
Volume 11, Issue 11, Pages 10844-10851Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.7b04097
Keywords
dendrite@frame; kinetic control; phase segregation; ternary alloy; electrocatalysis; oxygen reduction reaction
Categories
Funding
- Korea University Future Research Grant
- [IBS-R023-D1]
- [NRF-2017R1A2B3005682]
- [NRF-2015R1D1A3A01019467]
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Pt-based alloy nanoframes have shown great potential as electrocatalysts toward the oxygen reduction reaction (ORR) in fuel cells. However, the intrinsically infirm nanoframes could be severely deformed during extended electro-cyclings, which eventually leads to the loss of the initial catalytic activity. Therefore, the structurally robust nanoframe is a worthy synthetic target. Furthermore, ternary alloy phase electrocatalysts offer more opportunities in optimizing the stability and activity than binary alloy ones. Herein, we report a robust PtCuNi ternary nanoframe, structurally fortified with an inner-lying PtCu dendrite, which shows a highly active and stable catalytic performance toward ORR. Remarkably, the PtCu@PtCuNi catalyst exhibited 11 and 16 times higher mass and specific activities than those of commercial Pt/C.
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