Electrocatalytic activity of PtRu alloy colloids for CO and CO/H2 electrooxidation: Stripping voltammetry and rotating disk measurements

T. J. Schmidt; M. Noeske; H. A. Gasteiger; R. J. Behm; P. Britz; W. Brijoux; H. Bönnemann

doi:10.1021/la962068r

Electrocatalytic activity of PtRu alloy colloids for CO and CO/H₂ electrooxidation: Stripping voltammetry and rotating disk measurements

T. J. Schmidt, M. Noeske, H. A. Gasteiger, R. J. Behm, P. Britz, W. Brijoux, H. Bönnemann

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230 Scopus citations

Abstract

The electrocatalytic activity of a bimetallic Pt_0.5Ru_0.5N(Oct₄)Cl colloid toward the oxidation of CO and a CO/H₂ gas mixture (simulated reformer gas) was measured. The particle size distribution with a mean diameter of 1.7 ± 0.5 nm was determined by high-resolution transmission electron microscopy, and the formation of stoichiometrically alloyed particles was verified by point-resolved energy dispersive X-ray analysis. The CO-stripping voltammetry of glassy carbon supported Pt_0.5Ru_0.5 clusters was found to be in excellent agreement with CO-stripping voltammetry data measured on well-characterized bulk alloy electrodes. The activity of the colloid toward the continuous oxidation of 2% CO in H₂ was assessed in a rotating disk electrode configuration at 25°C in 0.5 M H₂SO₄, leading to the conclusion that PtRu colloids are a promising route toward the preparation of bimetallic high-surface-area fuel cell catalysts.

Original language	English
Pages (from-to)	2591-2595
Number of pages	5
Journal	Langmuir
Volume	13
Issue number	10
DOIs	https://doi.org/10.1021/la962068r
State	Published - 14 May 1997
Externally published	Yes

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@article{7588b9c64476417e9a606a4614eb9b7b,

title = "Electrocatalytic activity of PtRu alloy colloids for CO and CO/H2 electrooxidation: Stripping voltammetry and rotating disk measurements",

abstract = "The electrocatalytic activity of a bimetallic Pt0.5Ru0.5N(Oct4)Cl colloid toward the oxidation of CO and a CO/H2 gas mixture (simulated reformer gas) was measured. The particle size distribution with a mean diameter of 1.7 ± 0.5 nm was determined by high-resolution transmission electron microscopy, and the formation of stoichiometrically alloyed particles was verified by point-resolved energy dispersive X-ray analysis. The CO-stripping voltammetry of glassy carbon supported Pt0.5Ru0.5 clusters was found to be in excellent agreement with CO-stripping voltammetry data measured on well-characterized bulk alloy electrodes. The activity of the colloid toward the continuous oxidation of 2% CO in H2 was assessed in a rotating disk electrode configuration at 25°C in 0.5 M H2SO4, leading to the conclusion that PtRu colloids are a promising route toward the preparation of bimetallic high-surface-area fuel cell catalysts.",

author = "Schmidt, {T. J.} and M. Noeske and Gasteiger, {H. A.} and Behm, {R. J.} and P. Britz and W. Brijoux and H. B{\"o}nnemann",

year = "1997",

month = may,

day = "14",

doi = "10.1021/la962068r",

language = "English",

volume = "13",

pages = "2591--2595",

journal = "Langmuir",

issn = "0743-7463",

publisher = "American Chemical Society",

number = "10",

}

TY - JOUR

T1 - Electrocatalytic activity of PtRu alloy colloids for CO and CO/H2 electrooxidation

T2 - Stripping voltammetry and rotating disk measurements

AU - Schmidt, T. J.

AU - Noeske, M.

AU - Gasteiger, H. A.

AU - Behm, R. J.

AU - Britz, P.

AU - Brijoux, W.

AU - Bönnemann, H.

PY - 1997/5/14

Y1 - 1997/5/14

N2 - The electrocatalytic activity of a bimetallic Pt0.5Ru0.5N(Oct4)Cl colloid toward the oxidation of CO and a CO/H2 gas mixture (simulated reformer gas) was measured. The particle size distribution with a mean diameter of 1.7 ± 0.5 nm was determined by high-resolution transmission electron microscopy, and the formation of stoichiometrically alloyed particles was verified by point-resolved energy dispersive X-ray analysis. The CO-stripping voltammetry of glassy carbon supported Pt0.5Ru0.5 clusters was found to be in excellent agreement with CO-stripping voltammetry data measured on well-characterized bulk alloy electrodes. The activity of the colloid toward the continuous oxidation of 2% CO in H2 was assessed in a rotating disk electrode configuration at 25°C in 0.5 M H2SO4, leading to the conclusion that PtRu colloids are a promising route toward the preparation of bimetallic high-surface-area fuel cell catalysts.

AB - The electrocatalytic activity of a bimetallic Pt0.5Ru0.5N(Oct4)Cl colloid toward the oxidation of CO and a CO/H2 gas mixture (simulated reformer gas) was measured. The particle size distribution with a mean diameter of 1.7 ± 0.5 nm was determined by high-resolution transmission electron microscopy, and the formation of stoichiometrically alloyed particles was verified by point-resolved energy dispersive X-ray analysis. The CO-stripping voltammetry of glassy carbon supported Pt0.5Ru0.5 clusters was found to be in excellent agreement with CO-stripping voltammetry data measured on well-characterized bulk alloy electrodes. The activity of the colloid toward the continuous oxidation of 2% CO in H2 was assessed in a rotating disk electrode configuration at 25°C in 0.5 M H2SO4, leading to the conclusion that PtRu colloids are a promising route toward the preparation of bimetallic high-surface-area fuel cell catalysts.

UR - http://www.scopus.com/inward/record.url?scp=6244232908&partnerID=8YFLogxK

U2 - 10.1021/la962068r

DO - 10.1021/la962068r

M3 - Article

AN - SCOPUS:6244232908

SN - 0743-7463

VL - 13

SP - 2591

EP - 2595

JO - Langmuir

JF - Langmuir

IS - 10

ER -

Electrocatalytic activity of PtRu alloy colloids for CO and CO/H₂ electrooxidation: Stripping voltammetry and rotating disk measurements

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