Ru-core@Pt-shell nanosheet for fuel cell electrocatalysts with high activity and durability

被引：31
作者：
Takimoto, Daisuke [1 ]
Ohnishi, Tomohiro [2 ]
Nutariya, Jeerapat [2 ,3 ]
Shen, Zhongrong [2 ]
Ayato, Yusuke [2 ,4 ]
Mochizuki, Dai [1 ,2 ,4 ]
Demortiere, Arnaud [5 ,6 ]
Boulineau, Adrien [7 ,8 ]
Sugimoto, Wataru [1 ,2 ,4 ]
机构：
[1] Shinshu Univ, Interdisciplinary Grad Sch Sci & Technol, 3-15-1 Tokida, Ueda, Nagano 3868567, Japan
[2] Shinshu Univ, Fac Text Sci & Technol, 3-15-1 Tokida, Ueda, Nagano 3868567, Japan
[3] Ubon Ratchathani Univ, Fac Sci, Dept Phys, 85 Satholmark Rd, Warin Chamrap 34190, Ubon Ratchathan, Thailand
[4] Shinshu Univ, Ctr Energy & Environm Sci, 3-15-1 Tokida, Ueda, Nagano 3868567, Japan
[5] CNRS, FR 3459, RS2E, Amiens, France
[6] Univ Picardie Jules Verne, CNRS, UMR 7314, LRCS, F-80039 Amiens, France
[7] CEA, LITEN, 17 Rue Martyrs, F-38054 Grenoble 9, France
[8] Univ Grenoble Alpes, F-38000 Grenoble, France
来源：
JOURNAL OF CATALYSIS | 2017年 / 345卷
基金：
日本学术振兴会;
关键词：
Core-shell; Nanosheet; Oxygen reduction reaction; Hydrogen oxidation reaction; CO tolerance; Durability; OXYGEN REDUCTION REACTION; CRYSTALLINE PLATINUM NANOSHEETS; LIMITED REDOX REPLACEMENT; THIN-FILM CATALYSTS; ELECTRONIC-STRUCTURE; MONOLAYER SHELL; SURFACE; STABILITY; HYDROGEN; ALLOY;
D O I：
10.1016/j.jcat.2016.11.026
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Pt-based electrocatalysts with higher activity and durability are necessary for cost-competitive polymer electrolyte membrane fuel cells. We have combined the high utilization and activity of core@shell nanostructures with the high surface area and stability of atomically thin nanosheets to afford electrocatalysts that show enhanced activity and durability for both cathode and anode reactions. Ru-core@Pt-shell nanosheets with an average thickness of 1.5-4.5 Pt monolayers have an electrochemically active Pt surface area of 112-151 m(2) (g-Pt)(-1), 1.4-1.9 times larger than typical Pt/C catalysts. A catalyst with a mono layer Ru-core and an average 3.5 monolayer Pt-shell supported on carbon (Ru@Pt-3.5ML(ns)/C) shows 4.5 times higher mass activity than benchmark Pt/C catalyst for the oxygen reduction reaction with a slower degradation rate, making this nanomaterial one of the most active and durable Pt-based catalysts. For the anode reactions, Ru@Pt-1.5ML(ns)/C shows 2 times higher apparent mass activity for the hydrogen oxidation activity in pure H-2 as well as 300 ppm CO containing H-2, and better stability against potential cycling. (C) 2016 Elsevier Inc. All rights reserved.
引用
收藏
页码：207 / 215
页数：9
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