Electrochemical surface area measurements of platinum- and palladium-based nanoparticles

被引：187

作者：

Shao, Minhua ^{[1
]}

Odell, Jonathan H. ^{[1
]}

Choi, Sang-Il ^{[2
,3
]}

Xia, Younan ^{[2
,3
]}

机构：

[1] UTC Power, South Windsor, CT 06074 USA

[2] Georgia Inst Technol, Wallace H Couler Dept Biomed Engn, Atlanta, GA 30332 USA

[3] Emory Univ, Sch Chem & Biochem, Sch Chem & Biomol Engn, Georgia Inst Technol, Atlanta, GA 30332 USA

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2013年 / 31卷

关键词：

Electrocatalysts; Octahedron; Shape-controlled; Platinum alloys; Specific activity; Oxygen reduction reaction; VOLTAMMETRY; ELECTRODES; DEPOSITION; CATALYSTS; COPPER;

D O I：

10.1016/j.elecom.2013.03.011

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrochemical surface area (ECA) calculation was studied using the charges associated with stripping of CO and underpotentially deposited H and Cu on highly dispersed Pt- and Pd-based nanoparticles. The surface areas followed a general trend of H-UPD < CO striping < Cu-UPD. Transition metals in the alloys were found to have a significant effect on the determination of surface area. The surface area could be underestimated by nearly 50% using H-UPD on conventional (non-shape-controlled) PtNi/C. In addition to the effect from Ni, the shape/structure of the nanoparticles also made the calculation more complicated. The surface area could be underestimated by more than two times using H-UPD on octahedral PtNi/C compared to using Cu-UPD. Cu-UPD was demonstrated to be a more accurate method to estimate the electrochemical active areas than H-UPD and CO striping. (c) 2013 Elsevier B.V. All rights reserved.

引用

页码：46 / 48

页数：3

共 18 条

[1] Determining the Active Surface Area for Various Platinum Electrodes [J].