Ethylene adsorption on Pt/Au/SiO2 catalysts

Jianyi Shen; Josephine M. Hill; Ramchandra M. Watwe; S. G. Podkolzin; J. A. Dumesic

doi:10.1023/a:1019038503569

Ethylene adsorption on Pt/Au/SiO₂ catalysts

Jianyi Shen, Josephine M. Hill, Ramchandra M. Watwe, S. G. Podkolzin, J. A. Dumesic

Nanjing University

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Abstract

Ethylene adsorption on a Pt/Au/SiO₂ catalyst (2 wt% Pt; Au/Pt atomic ratio of 10) was studied using adsorption microcalorimetry and FTIR spectroscopy. Ethylene adsorption at 300 K on Pt/Au/SiO₂ produced π-bonded, di-σ-bonded, and ethylidyne species with an initial heat of 140 kJ/mol, compared to a heat of 157 kJ/mol for Pt/SiO₂ on which only ethylidyne species formed. At 203 and 263 K, ethylene adsorbed on Pt as well as on Au surface atoms for the Pt/Au/SiO₂ catalyst. Quantum chemical, DFT calculations indicate that Au exerts a significantly smaller electronic effect on Pt than does addition of Sn to Pt.

Original language	English
Pages (from-to)	1-9
Number of pages	9
Journal	Catalysis Letters
Volume	60
Issue number	1-2
DOIs	https://doi.org/10.1023/a:1019038503569
State	Published - 1999

Keywords

Adsorption
CO
DFT
Ethylene
Gold
IR
Microcalorimetry
Platinum
Quantum chemical calculations

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title = "Ethylene adsorption on Pt/Au/SiO2 catalysts",

abstract = "Ethylene adsorption on a Pt/Au/SiO2 catalyst (2 wt% Pt; Au/Pt atomic ratio of 10) was studied using adsorption microcalorimetry and FTIR spectroscopy. Ethylene adsorption at 300 K on Pt/Au/SiO2 produced π-bonded, di-σ-bonded, and ethylidyne species with an initial heat of 140 kJ/mol, compared to a heat of 157 kJ/mol for Pt/SiO2 on which only ethylidyne species formed. At 203 and 263 K, ethylene adsorbed on Pt as well as on Au surface atoms for the Pt/Au/SiO2 catalyst. Quantum chemical, DFT calculations indicate that Au exerts a significantly smaller electronic effect on Pt than does addition of Sn to Pt.",

keywords = "Adsorption, CO, DFT, Ethylene, Gold, IR, Microcalorimetry, Platinum, Quantum chemical calculations",

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TY - JOUR

T1 - Ethylene adsorption on Pt/Au/SiO2 catalysts

AU - Shen, Jianyi

AU - Hill, Josephine M.

AU - Watwe, Ramchandra M.

AU - Podkolzin, S. G.

AU - Dumesic, J. A.

PY - 1999

Y1 - 1999

N2 - Ethylene adsorption on a Pt/Au/SiO2 catalyst (2 wt% Pt; Au/Pt atomic ratio of 10) was studied using adsorption microcalorimetry and FTIR spectroscopy. Ethylene adsorption at 300 K on Pt/Au/SiO2 produced π-bonded, di-σ-bonded, and ethylidyne species with an initial heat of 140 kJ/mol, compared to a heat of 157 kJ/mol for Pt/SiO2 on which only ethylidyne species formed. At 203 and 263 K, ethylene adsorbed on Pt as well as on Au surface atoms for the Pt/Au/SiO2 catalyst. Quantum chemical, DFT calculations indicate that Au exerts a significantly smaller electronic effect on Pt than does addition of Sn to Pt.

AB - Ethylene adsorption on a Pt/Au/SiO2 catalyst (2 wt% Pt; Au/Pt atomic ratio of 10) was studied using adsorption microcalorimetry and FTIR spectroscopy. Ethylene adsorption at 300 K on Pt/Au/SiO2 produced π-bonded, di-σ-bonded, and ethylidyne species with an initial heat of 140 kJ/mol, compared to a heat of 157 kJ/mol for Pt/SiO2 on which only ethylidyne species formed. At 203 and 263 K, ethylene adsorbed on Pt as well as on Au surface atoms for the Pt/Au/SiO2 catalyst. Quantum chemical, DFT calculations indicate that Au exerts a significantly smaller electronic effect on Pt than does addition of Sn to Pt.

KW - Adsorption

KW - CO

KW - DFT

KW - Ethylene

KW - Gold

KW - IR

KW - Microcalorimetry

KW - Platinum

KW - Quantum chemical calculations

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DO - 10.1023/a:1019038503569

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VL - 60

SP - 1

EP - 9

JO - Catalysis Letters

JF - Catalysis Letters

IS - 1-2

ER -

Ethylene adsorption on Pt/Au/SiO₂ catalysts

Abstract

Keywords

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