Pd1/MgO(1 0 0): A model system in nanocatalysis

S. Abbet; A. M. Ferrari; L. Giordano; G. Pacchioni; H. Häkkinen; U. Landman; U. Heiz

doi:10.1016/S0039-6028(02)01637-0

Pd₁/MgO(1 0 0): A model system in nanocatalysis

S. Abbet, A. M. Ferrari, L. Giordano, G. Pacchioni, H. Häkkinen, U. Landman, U. Heiz

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

39 Scopus citations

Abstract

Nanocatalysts consist of small size-selected clusters adsorbed on uniform sites of a support material. Here, we focus on a simple model system, which is fabricated by soft-landing atomic Pd ions on oxygen vacancies (F-centers) of a MgO(1 0 0) surface (Pd₁/MgO(F_s)). We used thermal desorption and infrared spectroscopies (TDS, FTIR) to study the acetylene polymerization and the CO oxidation catalyzed by this system. In one-heating-cycle experiments, only the formation of benzene is observed during the polymerization reaction and the combustion of CO leads to the formation of CO₂ detected at 260 and 500 K. Experimental results in combination with ab initio calculations reveal the mechanisms of these reactions and demonstrate the role of surface defects in nanocatalysis.

Original language	English
Pages (from-to)	249-255
Number of pages	7
Journal	Surface Science
Volume	514
Issue number	1-3
DOIs	https://doi.org/10.1016/S0039-6028(02)01637-0
State	Published - 10 Aug 2002
Externally published	Yes

Keywords

Alkynes
Carbon monoxide
Catalysis
Density functional calculations
Magnesium oxides
Palladium
Surface chemical reaction
Thermal desorption spectroscopy

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10.1016/S0039-6028(02)01637-0

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title = "Pd1/MgO(1 0 0): A model system in nanocatalysis",

abstract = "Nanocatalysts consist of small size-selected clusters adsorbed on uniform sites of a support material. Here, we focus on a simple model system, which is fabricated by soft-landing atomic Pd ions on oxygen vacancies (F-centers) of a MgO(1 0 0) surface (Pd1/MgO(Fs)). We used thermal desorption and infrared spectroscopies (TDS, FTIR) to study the acetylene polymerization and the CO oxidation catalyzed by this system. In one-heating-cycle experiments, only the formation of benzene is observed during the polymerization reaction and the combustion of CO leads to the formation of CO2 detected at 260 and 500 K. Experimental results in combination with ab initio calculations reveal the mechanisms of these reactions and demonstrate the role of surface defects in nanocatalysis.",

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author = "S. Abbet and Ferrari, {A. M.} and L. Giordano and G. Pacchioni and H. H{\"a}kkinen and U. Landman and U. Heiz",

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T2 - A model system in nanocatalysis

AU - Abbet, S.

AU - Ferrari, A. M.

AU - Giordano, L.

AU - Pacchioni, G.

AU - Häkkinen, H.

AU - Landman, U.

AU - Heiz, U.

PY - 2002/8/10

Y1 - 2002/8/10

N2 - Nanocatalysts consist of small size-selected clusters adsorbed on uniform sites of a support material. Here, we focus on a simple model system, which is fabricated by soft-landing atomic Pd ions on oxygen vacancies (F-centers) of a MgO(1 0 0) surface (Pd1/MgO(Fs)). We used thermal desorption and infrared spectroscopies (TDS, FTIR) to study the acetylene polymerization and the CO oxidation catalyzed by this system. In one-heating-cycle experiments, only the formation of benzene is observed during the polymerization reaction and the combustion of CO leads to the formation of CO2 detected at 260 and 500 K. Experimental results in combination with ab initio calculations reveal the mechanisms of these reactions and demonstrate the role of surface defects in nanocatalysis.

AB - Nanocatalysts consist of small size-selected clusters adsorbed on uniform sites of a support material. Here, we focus on a simple model system, which is fabricated by soft-landing atomic Pd ions on oxygen vacancies (F-centers) of a MgO(1 0 0) surface (Pd1/MgO(Fs)). We used thermal desorption and infrared spectroscopies (TDS, FTIR) to study the acetylene polymerization and the CO oxidation catalyzed by this system. In one-heating-cycle experiments, only the formation of benzene is observed during the polymerization reaction and the combustion of CO leads to the formation of CO2 detected at 260 and 500 K. Experimental results in combination with ab initio calculations reveal the mechanisms of these reactions and demonstrate the role of surface defects in nanocatalysis.

KW - Alkynes

KW - Carbon monoxide

KW - Catalysis

KW - Density functional calculations

KW - Magnesium oxides

KW - Palladium

KW - Surface chemical reaction

KW - Thermal desorption spectroscopy

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EP - 255

JO - Surface Science

JF - Surface Science

IS - 1-3

ER -

Pd₁/MgO(1 0 0): A model system in nanocatalysis

Abstract

Keywords

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