Iridium-decorated Palladium-Platinum core-shell catalysts for oxygen reduction reaction in proton exchange membrane fuel cell

被引：26

作者：

Wang, Chen-Hao ^{[1
]}

Hsu, Hsin-Cheng ^{[1
]}

Wang, Kai-Ching ^{[1
]}

机构：

[1] Natl Taiwan Univ Sci & Technol, Dept Mat Sci & Engn, Taipei 10607, Taiwan

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2014年 / 427卷

关键词：

Fuel cell; Oxygen reduction reaction; Core-shell structure; HIGH-PERFORMANCE ANODE; MONOLAYER ELECTROCATALYSTS; O-2; REDUCTION; ALLOY ELECTROCATALYSTS; PT NANOPARTICLES; NANOWIRE ARRAYS; ELECTROLYTE; DEGRADATION; SURFACE; NI;

D O I：

10.1016/j.jcis.2013.11.068

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：

Carbon-supported Pt, Pd, Pd-Pt core-shell (Pt-shell-Pd-core/C) and Ir-decorated Pd-Pt core-shell (Ir-decorated Pt-shell-Pd-core/C) catalysts were synthesized, and their physical properties, electrochemical behaviors, oxygen reduction reaction (ORR) characteristics and proton exchange membrane fuel cell (PEMFC) performances were investigated herein. From the XRD patterns and TEM images, Ir-decorated Pt-shell-Pd-core/C has been confirmed that Pt was deposited on the Pd nanoparticle which had the core-shell structure. Ir-decorated Pt-shell-Pd-core/C has more positive OH reduction peak than Pt/C, which is beneficial to weaken the binding energy of Pt-OH during the ORR. Thus, Ir-decorated Pt-shell-Pd-core/C has higher ORR activity than Pt/C. The maximum power density of H-2-O-2 PEMFC using Ir-decorated Pt-shell-Pd-core/C is 792.2 mW cm(-2) at 70 degrees C, which is 24% higher than that using Pt/C. The single-cell accelerated degradation test of PEMFC using Ir-decorated Pt-shell-Pd-core/C shows good durability by the potential cycling of 40,000 cycles. This study concludes that Ir-decorated Pt-shell-Pd-core/C has the low Pt content, but it can facilitate the low-cost and high-efficient PEMFC. (C) 2013 Elsevier Inc. All rights reserved.

引用

页码：91 / 97

页数：7

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