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

Minhua Shao; Jonathan H. Odell; Sang Il Choi; Younan Xia

doi:10.1016/j.elecom.2013.03.011

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

Minhua Shao, Jonathan H. Odell, Sang Il Choi, Younan Xia

Research output: Contribution to journal › Article › peer-review

190 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	46-48
Number of pages	3
Journal	Electrochemistry Communications
Volume	31
DOIs	https://doi.org/10.1016/j.elecom.2013.03.011
State	Published - Jun 2013

Keywords

Electrocatalysts
Octahedron
Oxygen reduction reaction
Platinum alloys
Shape-controlled
Specific activity

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10.1016/j.elecom.2013.03.011

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title = "Electrochemical surface area measurements of platinum- and palladium-based nanoparticles",

abstract = "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 HUPD < CO striping < CuUPD. 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 HUPD 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 HUPD on octahedral PtNi/C compared to using CuUPD. CuUPD was demonstrated to be a more accurate method to estimate the electrochemical active areas than HUPD and CO striping.",

keywords = "Electrocatalysts, Octahedron, Oxygen reduction reaction, Platinum alloys, Shape-controlled, Specific activity",

author = "Minhua Shao and Odell, {Jonathan H.} and Choi, {Sang Il} and Younan Xia",

year = "2013",

month = jun,

doi = "10.1016/j.elecom.2013.03.011",

language = "English",

volume = "31",

pages = "46--48",

journal = "Electrochemistry Communications",

issn = "1388-2481",

publisher = "Elsevier Inc.",

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TY - JOUR

T1 - Electrochemical surface area measurements of platinum- and palladium-based nanoparticles

AU - Shao, Minhua

AU - Odell, Jonathan H.

AU - Choi, Sang Il

AU - Xia, Younan

PY - 2013/6

Y1 - 2013/6

N2 - 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 HUPD < CO striping < CuUPD. 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 HUPD 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 HUPD on octahedral PtNi/C compared to using CuUPD. CuUPD was demonstrated to be a more accurate method to estimate the electrochemical active areas than HUPD and CO striping.

AB - 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 HUPD < CO striping < CuUPD. 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 HUPD 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 HUPD on octahedral PtNi/C compared to using CuUPD. CuUPD was demonstrated to be a more accurate method to estimate the electrochemical active areas than HUPD and CO striping.

KW - Electrocatalysts

KW - Octahedron

KW - Oxygen reduction reaction

KW - Platinum alloys

KW - Shape-controlled

KW - Specific activity

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DO - 10.1016/j.elecom.2013.03.011

M3 - Article

AN - SCOPUS:84875389361

SN - 1388-2481

VL - 31

SP - 46

EP - 48

JO - Electrochemistry Communications

JF - Electrochemistry Communications

ER -

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

Abstract

Keywords

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