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

页码：207 / 215

页数：9

共 44 条

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