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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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",

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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

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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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