Hydrogen electrooxidation over palladium-gold alloy: Effect of pretreatment in ethylene on catalytic activity and CO tolerance

Alexander N. Simonov; Pavel E. Plyusnin; Yury V. Shubin; Ren I. Kvon; Sergey V. Korenev; Valentin N. Parmon

doi:10.1016/j.electacta.2012.05.043

Hydrogen electrooxidation over palladium-gold alloy: Effect of pretreatment in ethylene on catalytic activity and CO tolerance

Alexander N. Simonov
, Pavel E. Plyusnin
, Yury V. Shubin
, Ren I. Kvon
, Sergey V. Korenev
, Valentin N. Parmon

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

18 Citations (Scopus)

Abstract

Palladium gold alloy powder (PdAu ₂) was synthesized by reduction of the [Pd(NH ₃) ₄][AuCl ₄] ₂ complex with H ₂ at 90°C, and then was additionally heated in a C ₂H ₄ (PdAu ₂-C _x) or H ₂ flow (PdAu ₂-H ₂) at 300°C. The samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy and by a set of electrochemical methods. The Pd:Au ratio on the surface of the PdAu ₂ alloy suffers marginal changes after heating under C ₂H ₄ atmosphere, and decreases as a result of heating in a H ₂ flow. Hydrogen oxidation reaction (HOR) over the catalysts was studied using rotating disk electrode at 25°C in 0.1 M HClO ₄ in pure H ₂ and in the presence of 1100 ppm of CO. Heat-treatment of the PdAu ₂ alloy under H ₂ does not improve its HOR activity and CO tolerance (normalized to Pd and total metal surface area), while the PdAu ₂-C _x catalyst exhibits substantially enhanced catalytic performance in the HOR both in the absence and in the presence of CO as compared to the parent PdAu ₂ alloy. The enhanced activity of the C ₂H ₄-treated PdAu ₂ alloy is explained by the promoting action of carbon atoms incorporated into the alloy structure during treatment under C ₂H ₄ atmosphere. This supposition is approved by the fact that mild oxidative treatment of the PdAu ₂-C _x sample degrades notably its catalytic activity.

Original language	English
Pages (from-to)	344-353
Number of pages	10
Journal	Electrochimica Acta
Volume	76
DOIs	https://doi.org/10.1016/j.electacta.2012.05.043
Publication status	Published - 1 Aug 2012
Externally published	Yes

Keywords

CO tolerance
Hydrogen electrooxidation
Interstitial carbon
Palladium-gold alloy

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10.1016/j.electacta.2012.05.043

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@article{0d3acb85c6db48d881c51f44a8da53d2,

title = "Hydrogen electrooxidation over palladium-gold alloy: Effect of pretreatment in ethylene on catalytic activity and CO tolerance",

abstract = "Palladium gold alloy powder (PdAu 2) was synthesized by reduction of the [Pd(NH 3) 4][AuCl 4] 2 complex with H 2 at 90°C, and then was additionally heated in a C 2H 4 (PdAu 2-C x) or H 2 flow (PdAu 2-H 2) at 300°C. The samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy and by a set of electrochemical methods. The Pd:Au ratio on the surface of the PdAu 2 alloy suffers marginal changes after heating under C 2H 4 atmosphere, and decreases as a result of heating in a H 2 flow. Hydrogen oxidation reaction (HOR) over the catalysts was studied using rotating disk electrode at 25°C in 0.1 M HClO 4 in pure H 2 and in the presence of 1100 ppm of CO. Heat-treatment of the PdAu 2 alloy under H 2 does not improve its HOR activity and CO tolerance (normalized to Pd and total metal surface area), while the PdAu 2-C x catalyst exhibits substantially enhanced catalytic performance in the HOR both in the absence and in the presence of CO as compared to the parent PdAu 2 alloy. The enhanced activity of the C 2H 4-treated PdAu 2 alloy is explained by the promoting action of carbon atoms incorporated into the alloy structure during treatment under C 2H 4 atmosphere. This supposition is approved by the fact that mild oxidative treatment of the PdAu 2-C x sample degrades notably its catalytic activity.",

keywords = "CO tolerance, Hydrogen electrooxidation, Interstitial carbon, Palladium-gold alloy",

author = "Simonov, \{Alexander N.\} and Plyusnin, \{Pavel E.\} and Shubin, \{Yury V.\} and Kvon, \{Ren I.\} and Korenev, \{Sergey V.\} and Parmon, \{Valentin N.\}",

year = "2012",

month = aug,

day = "1",

doi = "10.1016/j.electacta.2012.05.043",

language = "English",

volume = "76",

pages = "344--353",

journal = "Electrochimica Acta",

issn = "0013-4686",

publisher = "Elsevier",

}

TY - JOUR

T1 - Hydrogen electrooxidation over palladium-gold alloy

T2 - Effect of pretreatment in ethylene on catalytic activity and CO tolerance

AU - Simonov, Alexander N.

AU - Plyusnin, Pavel E.

AU - Shubin, Yury V.

AU - Kvon, Ren I.

AU - Korenev, Sergey V.

AU - Parmon, Valentin N.

PY - 2012/8/1

Y1 - 2012/8/1

N2 - Palladium gold alloy powder (PdAu 2) was synthesized by reduction of the [Pd(NH 3) 4][AuCl 4] 2 complex with H 2 at 90°C, and then was additionally heated in a C 2H 4 (PdAu 2-C x) or H 2 flow (PdAu 2-H 2) at 300°C. The samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy and by a set of electrochemical methods. The Pd:Au ratio on the surface of the PdAu 2 alloy suffers marginal changes after heating under C 2H 4 atmosphere, and decreases as a result of heating in a H 2 flow. Hydrogen oxidation reaction (HOR) over the catalysts was studied using rotating disk electrode at 25°C in 0.1 M HClO 4 in pure H 2 and in the presence of 1100 ppm of CO. Heat-treatment of the PdAu 2 alloy under H 2 does not improve its HOR activity and CO tolerance (normalized to Pd and total metal surface area), while the PdAu 2-C x catalyst exhibits substantially enhanced catalytic performance in the HOR both in the absence and in the presence of CO as compared to the parent PdAu 2 alloy. The enhanced activity of the C 2H 4-treated PdAu 2 alloy is explained by the promoting action of carbon atoms incorporated into the alloy structure during treatment under C 2H 4 atmosphere. This supposition is approved by the fact that mild oxidative treatment of the PdAu 2-C x sample degrades notably its catalytic activity.

AB - Palladium gold alloy powder (PdAu 2) was synthesized by reduction of the [Pd(NH 3) 4][AuCl 4] 2 complex with H 2 at 90°C, and then was additionally heated in a C 2H 4 (PdAu 2-C x) or H 2 flow (PdAu 2-H 2) at 300°C. The samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy and by a set of electrochemical methods. The Pd:Au ratio on the surface of the PdAu 2 alloy suffers marginal changes after heating under C 2H 4 atmosphere, and decreases as a result of heating in a H 2 flow. Hydrogen oxidation reaction (HOR) over the catalysts was studied using rotating disk electrode at 25°C in 0.1 M HClO 4 in pure H 2 and in the presence of 1100 ppm of CO. Heat-treatment of the PdAu 2 alloy under H 2 does not improve its HOR activity and CO tolerance (normalized to Pd and total metal surface area), while the PdAu 2-C x catalyst exhibits substantially enhanced catalytic performance in the HOR both in the absence and in the presence of CO as compared to the parent PdAu 2 alloy. The enhanced activity of the C 2H 4-treated PdAu 2 alloy is explained by the promoting action of carbon atoms incorporated into the alloy structure during treatment under C 2H 4 atmosphere. This supposition is approved by the fact that mild oxidative treatment of the PdAu 2-C x sample degrades notably its catalytic activity.

KW - CO tolerance

KW - Hydrogen electrooxidation

KW - Interstitial carbon

KW - Palladium-gold alloy

UR - https://www.scopus.com/pages/publications/84862980156

U2 - 10.1016/j.electacta.2012.05.043

DO - 10.1016/j.electacta.2012.05.043

M3 - Article

AN - SCOPUS:84862980156

SN - 0013-4686

VL - 76

SP - 344

EP - 353

JO - Electrochimica Acta

JF - Electrochimica Acta

ER -

Hydrogen electrooxidation over palladium-gold alloy: Effect of pretreatment in ethylene on catalytic activity and CO tolerance

Abstract

Keywords

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