Mrinal Kanti Kabiraz

Radially Phase Segregated PtCu@PtCuNi Dendrite@Frame
Nanocatalyst for Oxygen Reduction Reaction

Mrinal Kanti Kabiraz, Sang-Il Choi*
*Corresponding Author: Prof. Sang-Il Choi
E-mail: sichoi@knu.ac.kr
Abstract
Pt-based alloy nanoframes have shown a great potential as electrocatalysts toward 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 inner-lying PtCu dendrite, which shows highly active and stable catalytic performance toward ORR. Remarkably, the PtCu@PtCuNi catalyst exhibited 11 and 16 times higher mass and specific activities than commercial Pt/C

Keywords: dendrite@frame, kinetic control, phase-segregation, ternary alloy, electrocatalysis, oxygen reduction reaction
Reference: 10.1021/acsnano.7b04097
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