Temperature-programmed reduction study on carbon-supported platinum-gold alloy catalysts

Kuan Wen Wang; Chuin Tih Yeh

doi:10.1016/j.jcis.2008.04.069

Temperature-programmed reduction study on carbon-supported platinum-gold alloy catalysts

Kuan Wen Wang, Chuin Tih Yeh

Graduate Institute of Materials Science and Engineering

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

15 Scopus citations

Abstract

Alloy catalysts of Pt-Au/C with different Pt/Au ratios were prepared by the precipitation-deposition of metal chlorides and reduced by H₂ at 470 K. The surface composition of alloy crystallites deposited on the prepared catalysts was characterized by a technique of temperature-programmed reduction (TPR). In the characterization, O₂ was chemisorbed on the reduced catalysts and the chemisorbed O₂ was reduced by TPR. A low-temperature routine (LT) in the temperature range between 120 and 430 K was used for the TPR characterization. Monometallic catalysts of Au/C and Pt/C showed a reduction peak in the LT-TPR at reduction temperature (T_r) = 145 and 240 K, respectively. T_r from alloyed catalysts fell in the range and increased monotonously with their Pt/Au ratios. Interior Pt atoms in deposited alloy particles tended to segregate toward their surface during oxidation treatment at elevated temperatures.

Original language	English
Pages (from-to)	203-206
Number of pages	4
Journal	Journal of Colloid and Interface Science
Volume	325
Issue number	1
DOIs	https://doi.org/10.1016/j.jcis.2008.04.069
State	Published - 1 Sep 2008

Keywords

Alloy
Gold
Platinum
Redox treatment
Temperature-programmed reduction

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10.1016/j.jcis.2008.04.069

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title = "Temperature-programmed reduction study on carbon-supported platinum-gold alloy catalysts",

abstract = "Alloy catalysts of Pt-Au/C with different Pt/Au ratios were prepared by the precipitation-deposition of metal chlorides and reduced by H2 at 470 K. The surface composition of alloy crystallites deposited on the prepared catalysts was characterized by a technique of temperature-programmed reduction (TPR). In the characterization, O2 was chemisorbed on the reduced catalysts and the chemisorbed O2 was reduced by TPR. A low-temperature routine (LT) in the temperature range between 120 and 430 K was used for the TPR characterization. Monometallic catalysts of Au/C and Pt/C showed a reduction peak in the LT-TPR at reduction temperature (Tr) = 145 and 240 K, respectively. Tr from alloyed catalysts fell in the range and increased monotonously with their Pt/Au ratios. Interior Pt atoms in deposited alloy particles tended to segregate toward their surface during oxidation treatment at elevated temperatures.",

keywords = "Alloy, Gold, Platinum, Redox treatment, Temperature-programmed reduction",

author = "Wang, {Kuan Wen} and Yeh, {Chuin Tih}",

note = "Funding Information: The authors appreciate the National Science Council of the Republic of China for financial support on this study under Contract No. NSC 95-2113-m-155-001. ",

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T1 - Temperature-programmed reduction study on carbon-supported platinum-gold alloy catalysts

AU - Wang, Kuan Wen

AU - Yeh, Chuin Tih

N1 - Funding Information: The authors appreciate the National Science Council of the Republic of China for financial support on this study under Contract No. NSC 95-2113-m-155-001.

PY - 2008/9/1

Y1 - 2008/9/1

N2 - Alloy catalysts of Pt-Au/C with different Pt/Au ratios were prepared by the precipitation-deposition of metal chlorides and reduced by H2 at 470 K. The surface composition of alloy crystallites deposited on the prepared catalysts was characterized by a technique of temperature-programmed reduction (TPR). In the characterization, O2 was chemisorbed on the reduced catalysts and the chemisorbed O2 was reduced by TPR. A low-temperature routine (LT) in the temperature range between 120 and 430 K was used for the TPR characterization. Monometallic catalysts of Au/C and Pt/C showed a reduction peak in the LT-TPR at reduction temperature (Tr) = 145 and 240 K, respectively. Tr from alloyed catalysts fell in the range and increased monotonously with their Pt/Au ratios. Interior Pt atoms in deposited alloy particles tended to segregate toward their surface during oxidation treatment at elevated temperatures.

AB - Alloy catalysts of Pt-Au/C with different Pt/Au ratios were prepared by the precipitation-deposition of metal chlorides and reduced by H2 at 470 K. The surface composition of alloy crystallites deposited on the prepared catalysts was characterized by a technique of temperature-programmed reduction (TPR). In the characterization, O2 was chemisorbed on the reduced catalysts and the chemisorbed O2 was reduced by TPR. A low-temperature routine (LT) in the temperature range between 120 and 430 K was used for the TPR characterization. Monometallic catalysts of Au/C and Pt/C showed a reduction peak in the LT-TPR at reduction temperature (Tr) = 145 and 240 K, respectively. Tr from alloyed catalysts fell in the range and increased monotonously with their Pt/Au ratios. Interior Pt atoms in deposited alloy particles tended to segregate toward their surface during oxidation treatment at elevated temperatures.

KW - Alloy

KW - Gold

KW - Platinum

KW - Redox treatment

KW - Temperature-programmed reduction

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U2 - 10.1016/j.jcis.2008.04.069

DO - 10.1016/j.jcis.2008.04.069

M3 - 期刊論文

C2 - 18555264

AN - SCOPUS:47749141459

SN - 0021-9797

VL - 325

SP - 203

EP - 206

JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

IS - 1

ER -

Temperature-programmed reduction study on carbon-supported platinum-gold alloy catalysts

Abstract

Keywords

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