Stabilized gold on cerium-modified cryptomelane: Highly active in low-temperature CO oxidation

V. P. Santos; S. A.C. Carabineiro; J. J.W. Bakker; O. S.G.P. Soares; X. Chen; M. F.R. Pereira; J. J.M. Órfão; J. L. Figueiredo; J. Gascon; F. Kapteijn

doi:10.1016/j.jcat.2013.08.030

Stabilized gold on cerium-modified cryptomelane: Highly active in low-temperature CO oxidation

V. P. Santos^*, S. A.C. Carabineiro, J. J.W. Bakker, O. S.G.P. Soares, X. Chen, M. F.R. Pereira, J. J.M. Órfão, J. L. Figueiredo, J. Gascon, F. Kapteijn

^*Corresponding author for this work

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

83 Scopus citations

Abstract

Cerium-doped cryptomelane stabilizes polyhedron Au nano-particles smaller than 3 nm. The obtained Au/Ce/cryptomelane catalyst is highly active for CO oxidation. Cationic, neutral, and anionic gold species were found on Ce/cryptomelane. The modification of cryptomelane by the addition of cerium is twofold: (i) cerium is incorporated in the tunnels of cryptomelane, increasing the number of defects which function as nucleation sites for gold and (ii) ceria nano-particles at the surface induce charge transfer between gold and cryptomelane. TOF for Au/Ce-K-OMS-2 is about twice that of Au/CeO₂ prepared by the same procedure.

Original language	English (US)
Pages (from-to)	58-65
Number of pages	8
Journal	Journal of Catalysis
Volume	309
DOIs	https://doi.org/10.1016/j.jcat.2013.08.030
State	Published - 2014
Externally published	Yes

Keywords

CO oxidation
Cerium doping
Cryptomelane
Gold catalysis
Oxygen vacancies

ASJC Scopus subject areas

Catalysis
Physical and Theoretical Chemistry

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10.1016/j.jcat.2013.08.030

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@article{80d2434f7761444c8919770a2dc3e70e,

title = "Stabilized gold on cerium-modified cryptomelane: Highly active in low-temperature CO oxidation",

abstract = "Cerium-doped cryptomelane stabilizes polyhedron Au nano-particles smaller than 3 nm. The obtained Au/Ce/cryptomelane catalyst is highly active for CO oxidation. Cationic, neutral, and anionic gold species were found on Ce/cryptomelane. The modification of cryptomelane by the addition of cerium is twofold: (i) cerium is incorporated in the tunnels of cryptomelane, increasing the number of defects which function as nucleation sites for gold and (ii) ceria nano-particles at the surface induce charge transfer between gold and cryptomelane. TOF for Au/Ce-K-OMS-2 is about twice that of Au/CeO2 prepared by the same procedure.",

keywords = "CO oxidation, Cerium doping, Cryptomelane, Gold catalysis, Oxygen vacancies",

author = "Santos, {V. P.} and Carabineiro, {S. A.C.} and Bakker, {J. J.W.} and Soares, {O. S.G.P.} and X. Chen and Pereira, {M. F.R.} and {\'O}rf{\~a}o, {J. J.M.} and Figueiredo, {J. L.} and J. Gascon and F. Kapteijn",

year = "2014",

doi = "10.1016/j.jcat.2013.08.030",

language = "English (US)",

volume = "309",

pages = "58--65",

journal = "Journal of Catalysis",

issn = "0021-9517",

publisher = "Elsevier",

}

TY - JOUR

T1 - Stabilized gold on cerium-modified cryptomelane

T2 - Highly active in low-temperature CO oxidation

AU - Santos, V. P.

AU - Carabineiro, S. A.C.

AU - Bakker, J. J.W.

AU - Soares, O. S.G.P.

AU - Chen, X.

AU - Pereira, M. F.R.

AU - Órfão, J. J.M.

AU - Figueiredo, J. L.

AU - Gascon, J.

AU - Kapteijn, F.

PY - 2014

Y1 - 2014

N2 - Cerium-doped cryptomelane stabilizes polyhedron Au nano-particles smaller than 3 nm. The obtained Au/Ce/cryptomelane catalyst is highly active for CO oxidation. Cationic, neutral, and anionic gold species were found on Ce/cryptomelane. The modification of cryptomelane by the addition of cerium is twofold: (i) cerium is incorporated in the tunnels of cryptomelane, increasing the number of defects which function as nucleation sites for gold and (ii) ceria nano-particles at the surface induce charge transfer between gold and cryptomelane. TOF for Au/Ce-K-OMS-2 is about twice that of Au/CeO2 prepared by the same procedure.

AB - Cerium-doped cryptomelane stabilizes polyhedron Au nano-particles smaller than 3 nm. The obtained Au/Ce/cryptomelane catalyst is highly active for CO oxidation. Cationic, neutral, and anionic gold species were found on Ce/cryptomelane. The modification of cryptomelane by the addition of cerium is twofold: (i) cerium is incorporated in the tunnels of cryptomelane, increasing the number of defects which function as nucleation sites for gold and (ii) ceria nano-particles at the surface induce charge transfer between gold and cryptomelane. TOF for Au/Ce-K-OMS-2 is about twice that of Au/CeO2 prepared by the same procedure.

KW - CO oxidation

KW - Cerium doping

KW - Cryptomelane

KW - Gold catalysis

KW - Oxygen vacancies

UR - http://www.scopus.com/inward/record.url?scp=84884965189&partnerID=8YFLogxK

U2 - 10.1016/j.jcat.2013.08.030

DO - 10.1016/j.jcat.2013.08.030

M3 - Article

AN - SCOPUS:84884965189

SN - 0021-9517

VL - 309

SP - 58

EP - 65

JO - Journal of Catalysis

JF - Journal of Catalysis

ER -

Stabilized gold on cerium-modified cryptomelane: Highly active in low-temperature CO oxidation

Abstract

Keywords

ASJC Scopus subject areas

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