Charging effects on bonding and catalyzed oxidation of CO on Au8 clusters on MgO

Bokwon Yoon; Hannu Häkkinen; Uzi Landman; Anke S. Wörz; Jean Marie Antonietti; Stéphane Abbet; Ken Judai; Ueli Heiz

doi:10.1126/science.1104168

Charging effects on bonding and catalyzed oxidation of CO on Au₈ clusters on MgO

Bokwon Yoon
, Hannu Häkkinen
, Uzi Landman
, Anke S. Wörz
, Jean Marie Antonietti
, Stéphane Abbet
, Ken Judai
, Ueli Heiz

Chair of Physical Chemistry

Georgia Institute of Technology
University of Jyväskylä
Technical University of Munich

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

1373 Scopus citations

Abstract

Gold octamers (Au₈) bound to oxygen-vacancy F-center defects on Mg(001) are the smallest clusters to catalyze the low-temperature oxidation of CO to CO₂, whereas clusters deposited on close-to-perfect magnesia surfaces remain chemically inert. Charging of the supported clusters plays a key role in promoting their chemical activity. Infrared measurements of the stretch vibration of CO adsorbed on mass-selected gold octamers soft-landed on MgO(001) with coadsorbed O₂ show a red shift on an F-center-rich surface with respect to the perfect surface. The experiments agree with quantum ab initio calculations that predict that a red shift of the C-O vibration should arise via electron back-donation to the CO antibonding orbital.

Original language	English
Pages (from-to)	403-407
Number of pages	5
Journal	Science
Volume	307
Issue number	5708
DOIs	https://doi.org/10.1126/science.1104168
State	Published - 21 Jan 2005

Access to Document

10.1126/science.1104168

Cite this

@article{629f9743d87841cfb8f9ac56a8206688,

title = "Charging effects on bonding and catalyzed oxidation of CO on Au8 clusters on MgO",

abstract = "Gold octamers (Au8) bound to oxygen-vacancy F-center defects on Mg(001) are the smallest clusters to catalyze the low-temperature oxidation of CO to CO2, whereas clusters deposited on close-to-perfect magnesia surfaces remain chemically inert. Charging of the supported clusters plays a key role in promoting their chemical activity. Infrared measurements of the stretch vibration of CO adsorbed on mass-selected gold octamers soft-landed on MgO(001) with coadsorbed O2 show a red shift on an F-center-rich surface with respect to the perfect surface. The experiments agree with quantum ab initio calculations that predict that a red shift of the C-O vibration should arise via electron back-donation to the CO antibonding orbital.",

author = "Bokwon Yoon and Hannu H{\"a}kkinen and Uzi Landman and W{\"o}rz, \{Anke S.\} and Antonietti, \{Jean Marie\} and St{\'e}phane Abbet and Ken Judai and Ueli Heiz",

year = "2005",

month = jan,

day = "21",

doi = "10.1126/science.1104168",

language = "English",

volume = "307",

pages = "403--407",

journal = "Science",

issn = "0036-8075",

publisher = "American Association for the Advancement of Science",

number = "5708",

}

TY - JOUR

T1 - Charging effects on bonding and catalyzed oxidation of CO on Au8 clusters on MgO

AU - Yoon, Bokwon

AU - Häkkinen, Hannu

AU - Landman, Uzi

AU - Wörz, Anke S.

AU - Antonietti, Jean Marie

AU - Abbet, Stéphane

AU - Judai, Ken

AU - Heiz, Ueli

PY - 2005/1/21

Y1 - 2005/1/21

N2 - Gold octamers (Au8) bound to oxygen-vacancy F-center defects on Mg(001) are the smallest clusters to catalyze the low-temperature oxidation of CO to CO2, whereas clusters deposited on close-to-perfect magnesia surfaces remain chemically inert. Charging of the supported clusters plays a key role in promoting their chemical activity. Infrared measurements of the stretch vibration of CO adsorbed on mass-selected gold octamers soft-landed on MgO(001) with coadsorbed O2 show a red shift on an F-center-rich surface with respect to the perfect surface. The experiments agree with quantum ab initio calculations that predict that a red shift of the C-O vibration should arise via electron back-donation to the CO antibonding orbital.

AB - Gold octamers (Au8) bound to oxygen-vacancy F-center defects on Mg(001) are the smallest clusters to catalyze the low-temperature oxidation of CO to CO2, whereas clusters deposited on close-to-perfect magnesia surfaces remain chemically inert. Charging of the supported clusters plays a key role in promoting their chemical activity. Infrared measurements of the stretch vibration of CO adsorbed on mass-selected gold octamers soft-landed on MgO(001) with coadsorbed O2 show a red shift on an F-center-rich surface with respect to the perfect surface. The experiments agree with quantum ab initio calculations that predict that a red shift of the C-O vibration should arise via electron back-donation to the CO antibonding orbital.

UR - https://www.scopus.com/pages/publications/12344293427

U2 - 10.1126/science.1104168

DO - 10.1126/science.1104168

M3 - Article

AN - SCOPUS:12344293427

SN - 0036-8075

VL - 307

SP - 403

EP - 407

JO - Science

JF - Science

IS - 5708

ER -

Charging effects on bonding and catalyzed oxidation of CO on Au₈ clusters on MgO

Abstract

Access to Document

Other files and links

Fingerprint

Cite this