Preferential CO oxidation in hydrogen-rich stream over Pt catalysts modified with alkali metals. Part I. Catalytic performance

Hisanori Tanaka; Masatoshi Kuriyama; Yoichi Ishida; Shin ichi Ito; Keiichi Tomishige; Kimio Kunimori

doi:10.1016/j.apcata.2008.03.030

Preferential CO oxidation in hydrogen-rich stream over Pt catalysts modified with alkali metals. Part I. Catalytic performance

Hisanori Tanaka, Masatoshi Kuriyama, Yoichi Ishida, Shin ichi Ito, Keiichi Tomishige, Kimio Kunimori

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

50 Citations (Scopus)

Abstract

In preferential CO oxidation in H₂-rich stream (PROX), the additive effect of potassium on Pt catalysts was more remarkable over Al₂O₃ than over SiO₂, ZrO₂, Nb₂O₅ and TiO₂. The additive effect of potassium to Pt/Al₂O₃ was more effective than other alkali metals. Especially, the presence of H₂ drastically promoted CO oxidation over Pt/Al₂O₃ modified with potassium. On the other hand, the suppressing effect of steam on the PROX was more significant over K-Pt/Al₂O₃ than over Pt/Al₂O₃, although the PROX activity of K-Pt/Al₂O₃ was much higher than that of Pt/Al₂O₃ even under the presence of steam. The different effect of steam addition to the PROX over K-Pt/Al₂O₃ suggests that the active site can be Pt surface modified with potassium ions.

Original language	English
Pages (from-to)	117-124
Number of pages	8
Journal	Applied Catalysis A: General
Volume	343
Issue number	1-2
DOIs	https://doi.org/10.1016/j.apcata.2008.03.030
Publication status	Published - 2008 Jul 1
Externally published	Yes

Keywords

Alkali metal ions
Platinum
Potassium
Preferential CO oxidation
Presence of H

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology

Access to Document

10.1016/j.apcata.2008.03.030

Cite this

@article{269893254ce94960ad18402fc60947e9,

title = "Preferential CO oxidation in hydrogen-rich stream over Pt catalysts modified with alkali metals. Part I. Catalytic performance",

abstract = "In preferential CO oxidation in H2-rich stream (PROX), the additive effect of potassium on Pt catalysts was more remarkable over Al2O3 than over SiO2, ZrO2, Nb2O5 and TiO2. The additive effect of potassium to Pt/Al2O3 was more effective than other alkali metals. Especially, the presence of H2 drastically promoted CO oxidation over Pt/Al2O3 modified with potassium. On the other hand, the suppressing effect of steam on the PROX was more significant over K-Pt/Al2O3 than over Pt/Al2O3, although the PROX activity of K-Pt/Al2O3 was much higher than that of Pt/Al2O3 even under the presence of steam. The different effect of steam addition to the PROX over K-Pt/Al2O3 suggests that the active site can be Pt surface modified with potassium ions.",

keywords = "Alkali metal ions, Platinum, Potassium, Preferential CO oxidation, Presence of H",

author = "Hisanori Tanaka and Masatoshi Kuriyama and Yoichi Ishida and Ito, {Shin ichi} and Keiichi Tomishige and Kimio Kunimori",

year = "2008",

month = jul,

day = "1",

doi = "10.1016/j.apcata.2008.03.030",

language = "English",

volume = "343",

pages = "117--124",

journal = "Applied Catalysis A: General",

issn = "0926-860X",

publisher = "Elsevier",

number = "1-2",

}

TY - JOUR

T1 - Preferential CO oxidation in hydrogen-rich stream over Pt catalysts modified with alkali metals. Part I. Catalytic performance

AU - Tanaka, Hisanori

AU - Kuriyama, Masatoshi

AU - Ishida, Yoichi

AU - Ito, Shin ichi

AU - Tomishige, Keiichi

AU - Kunimori, Kimio

PY - 2008/7/1

Y1 - 2008/7/1

N2 - In preferential CO oxidation in H2-rich stream (PROX), the additive effect of potassium on Pt catalysts was more remarkable over Al2O3 than over SiO2, ZrO2, Nb2O5 and TiO2. The additive effect of potassium to Pt/Al2O3 was more effective than other alkali metals. Especially, the presence of H2 drastically promoted CO oxidation over Pt/Al2O3 modified with potassium. On the other hand, the suppressing effect of steam on the PROX was more significant over K-Pt/Al2O3 than over Pt/Al2O3, although the PROX activity of K-Pt/Al2O3 was much higher than that of Pt/Al2O3 even under the presence of steam. The different effect of steam addition to the PROX over K-Pt/Al2O3 suggests that the active site can be Pt surface modified with potassium ions.

AB - In preferential CO oxidation in H2-rich stream (PROX), the additive effect of potassium on Pt catalysts was more remarkable over Al2O3 than over SiO2, ZrO2, Nb2O5 and TiO2. The additive effect of potassium to Pt/Al2O3 was more effective than other alkali metals. Especially, the presence of H2 drastically promoted CO oxidation over Pt/Al2O3 modified with potassium. On the other hand, the suppressing effect of steam on the PROX was more significant over K-Pt/Al2O3 than over Pt/Al2O3, although the PROX activity of K-Pt/Al2O3 was much higher than that of Pt/Al2O3 even under the presence of steam. The different effect of steam addition to the PROX over K-Pt/Al2O3 suggests that the active site can be Pt surface modified with potassium ions.

KW - Alkali metal ions

KW - Platinum

KW - Potassium

KW - Preferential CO oxidation

KW - Presence of H

UR - http://www.scopus.com/inward/record.url?scp=43849110606&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=43849110606&partnerID=8YFLogxK

U2 - 10.1016/j.apcata.2008.03.030

DO - 10.1016/j.apcata.2008.03.030

M3 - Article

AN - SCOPUS:43849110606

SN - 0926-860X

VL - 343

SP - 117

EP - 124

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

IS - 1-2

ER -

Preferential CO oxidation in hydrogen-rich stream over Pt catalysts modified with alkali metals. Part I. Catalytic performance

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this