Direct Synthesis of Intermetallic Platinum-Alloy Nanoparticles Highly-Loaded on Carbon Supports for Efficient Electrocatalysis

Title
Direct Synthesis of Intermetallic Platinum-Alloy Nanoparticles Highly-Loaded on Carbon Supports for Efficient Electrocatalysis
Authors
유성종이동욱이응준유태용유지문Arun Kumar SinhaMegalamane S. Bootharaju정위연이현석이병훈김지현Wytse Hooch Antink김용민이종민조성표성영은현택환
Issue Date
2020-08
Publisher
Journal of the American Chemical Society
Citation
VOL 142, NO 33-14200
Abstract
Compared to nanostructured platinum (Pt) catalysts, ordered Pt-based intermetallic nanoparticles supported on a carbon substrate exhibit much enhanced catalytic performance, especially in fuel cell electrocatalysis. However, direct synthesis of homogeneous intermetallic alloy nanocatalysts on carbonaceous supports with high loading is still challenging. Herein, we report a novel synthetic strategy to directly produce highly dispersed MPt alloy nanoparticles (M = Fe, Co, or Ni) on various carbon supports with high catalyst loading. Importantly, a unique bimetallic compound, composed of [M(bpy)3]2+ cation (bpy = 2,2′-bipyridine) and [PtCl6]2? anion, evenly decomposes on carbon surface and forms uniformly sized intermetallic nanoparticles with a nitrogen-doped carbon protection layer. The excellent oxygen reduction reaction (ORR) activity and stability of the representative reduced graphene oxide (rGO)-supported L10-FePt catalyst (37 wt %-FePt/rGO), exhibiting 18.8 times higher specific activity than commercial Pt/C catalyst without degradation over 20?000 cycles, well demonstrate the effectiveness of our synthetic approach toward uniformly alloyed nanoparticles with high homogeneity.
URI
http://pubs.kist.re.kr/handle/201004/72065
ISSN
0002-7863
Appears in Collections:
KIST Publication > Article
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