Effect of high oxygen reduction reaction activity of octahedral PtNi nanoparticle electrocatalysts on proton exchange membrane fuel cell performance

被引：37

作者：

Sakamoto, Ryogo ^{[1
]}

Omichi, Kaoru ^{[1
]}

Furuta, Terumi ^{[1
]}

Ichikawa, Masao ^{[1
]}

机构：

[1] Honda Res & Dev Co Ltd, Fundamental Technol Res Ctr, Wako, Saitama, Japan

来源：

JOURNAL OF POWER SOURCES | 2014年 / 269卷

关键词：

PEM fuel cell; Electrocatalysts; Octahedral PtNi nanoparticles; Oxygen reduction reaction; PLATINUM MONOLAYER; CATALYSTS; PD; STABILITY;

D O I：

10.1016/j.jpowsour.2014.07.011

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：

To reduce Pt loading in proton exchange membrane (PEM) fuel cells, we synthesized (111) faceted octahedral PtNi nanoparticles supported by carbon black (octahedral PtNi NPs/C) using a new chemical method, and evaluated the effect of reduction of Pt loading and durability in actual PEM fuel cells. We confirmed that the synthesized particles were octahedral and the PtNi alloy nanoparticles had a size of 10-15 nm. In high resolution transmission electron microscopy analysis, nearly all exposed surfaces of the octahedral PtNi NPs were identified as (111) facets. Energy dispersion X-ray spectroscopy analysis showed that the corners and edges of the octahedral PtNi NPs were richer in platinum than the internal region, thus it was determined that the octahedral PtNi NPs adopted a core -shell structure. Mass activity of octahedral PtNi NPs/C as a cathode in fuel cells was 3.4 times higher than that of commercial Pt catalysts. This corresponds to a 71% reduction of Pt for the cathode. In potential cycling tests, the octahedral PtNi NPs/C also exhibited better durability than the commercial Pt catalysts. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：117 / 123

页数：7

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