Nanosized Pt-Co catalysts for the preferential CO oxidation

Eun Yong Ko; Eun Duck Park; Kyung Won Seo; Hyun Chul Lee; Doohwan Lee; Soonho Kim

doi:10.1166/jnn.2006.058

Nanosized Pt-Co catalysts for the preferential CO oxidation

Eun Yong Ko, Eun Duck Park, Kyung Won Seo, Hyun Chul Lee, Doohwan Lee, Soonho Kim

Department of Chemical Engineering

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

10 Scopus citations

Abstract

The preferential CO oxidation in the presence of excess hydrogen was studied over Pt-Co/γ-Al ₂O ₃. CO chemisorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectrometer (EDX) and temperature programmed reduction (TPR) were conducted to characterize active catalysts. The catalytic activity for CO oxidation and methanation at low temperatures increased with the amounts of cobalt in Pt-Co/γ-Al ₂O ₃. This accompanied the TPR peak shift to lower temperatures. The optimum molar ratio between Co and Pt was determined to be 10. The co-impregnated Pt-Co/γ-Al ₂O ₃ appeared to be superior to Pt/Co/γ-Al ₂O ₃ and Co/Pt/γ-Al ₂O ₃. The reductive pretreatment at high temperature such as 773 K increased the CO ₂ selectivity over a wide reaction temperature. The bimetallic phase of Pt-Co seems to give rise to high catalytic activity in selective oxidation of CO in H ₂-rich stream.

Original language	English
Pages (from-to)	3567-3571
Number of pages	5
Journal	Journal of Nanoscience and Nanotechnology
Volume	6
Issue number	11
DOIs	https://doi.org/10.1166/jnn.2006.058
State	Published - Nov 2006

Keywords

CO oxidation
Fuel cell
PROX
Pt-Co
Pt/γ-Al O

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title = "Nanosized Pt-Co catalysts for the preferential CO oxidation",

abstract = "The preferential CO oxidation in the presence of excess hydrogen was studied over Pt-Co/γ-Al 2O 3. CO chemisorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectrometer (EDX) and temperature programmed reduction (TPR) were conducted to characterize active catalysts. The catalytic activity for CO oxidation and methanation at low temperatures increased with the amounts of cobalt in Pt-Co/γ-Al 2O 3. This accompanied the TPR peak shift to lower temperatures. The optimum molar ratio between Co and Pt was determined to be 10. The co-impregnated Pt-Co/γ-Al 2O 3 appeared to be superior to Pt/Co/γ-Al 2O 3 and Co/Pt/γ-Al 2O 3. The reductive pretreatment at high temperature such as 773 K increased the CO 2 selectivity over a wide reaction temperature. The bimetallic phase of Pt-Co seems to give rise to high catalytic activity in selective oxidation of CO in H 2-rich stream.",

keywords = "CO oxidation, Fuel cell, PROX, Pt-Co, Pt/γ-Al O",

author = "Ko, {Eun Yong} and Park, {Eun Duck} and Seo, {Kyung Won} and Lee, {Hyun Chul} and Doohwan Lee and Soonho Kim",

year = "2006",

month = nov,

doi = "10.1166/jnn.2006.058",

language = "English",

volume = "6",

pages = "3567--3571",

journal = "Journal of Nanoscience and Nanotechnology",

issn = "1533-4880",

publisher = "American Scientific Publishers",

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}

TY - JOUR

T1 - Nanosized Pt-Co catalysts for the preferential CO oxidation

AU - Ko, Eun Yong

AU - Park, Eun Duck

AU - Seo, Kyung Won

AU - Lee, Hyun Chul

AU - Lee, Doohwan

AU - Kim, Soonho

PY - 2006/11

Y1 - 2006/11

N2 - The preferential CO oxidation in the presence of excess hydrogen was studied over Pt-Co/γ-Al 2O 3. CO chemisorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectrometer (EDX) and temperature programmed reduction (TPR) were conducted to characterize active catalysts. The catalytic activity for CO oxidation and methanation at low temperatures increased with the amounts of cobalt in Pt-Co/γ-Al 2O 3. This accompanied the TPR peak shift to lower temperatures. The optimum molar ratio between Co and Pt was determined to be 10. The co-impregnated Pt-Co/γ-Al 2O 3 appeared to be superior to Pt/Co/γ-Al 2O 3 and Co/Pt/γ-Al 2O 3. The reductive pretreatment at high temperature such as 773 K increased the CO 2 selectivity over a wide reaction temperature. The bimetallic phase of Pt-Co seems to give rise to high catalytic activity in selective oxidation of CO in H 2-rich stream.

AB - The preferential CO oxidation in the presence of excess hydrogen was studied over Pt-Co/γ-Al 2O 3. CO chemisorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectrometer (EDX) and temperature programmed reduction (TPR) were conducted to characterize active catalysts. The catalytic activity for CO oxidation and methanation at low temperatures increased with the amounts of cobalt in Pt-Co/γ-Al 2O 3. This accompanied the TPR peak shift to lower temperatures. The optimum molar ratio between Co and Pt was determined to be 10. The co-impregnated Pt-Co/γ-Al 2O 3 appeared to be superior to Pt/Co/γ-Al 2O 3 and Co/Pt/γ-Al 2O 3. The reductive pretreatment at high temperature such as 773 K increased the CO 2 selectivity over a wide reaction temperature. The bimetallic phase of Pt-Co seems to give rise to high catalytic activity in selective oxidation of CO in H 2-rich stream.

KW - CO oxidation

KW - Fuel cell

KW - PROX

KW - Pt-Co

KW - Pt/γ-Al O

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U2 - 10.1166/jnn.2006.058

DO - 10.1166/jnn.2006.058

M3 - Article

C2 - 17252813

AN - SCOPUS:33845751154

SN - 1533-4880

VL - 6

SP - 3567

EP - 3571

JO - Journal of Nanoscience and Nanotechnology

JF - Journal of Nanoscience and Nanotechnology

IS - 11

ER -

Nanosized Pt-Co catalysts for the preferential CO oxidation

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Keywords

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