Activation of Oxygen on MgO: O2•- Radical Ion Formation on Thin, Metal-Supported MgO(001) Films

被引：91
|
作者：
Gonchar, Anastasia [2 ]
Risse, Thomas [2 ,3 ]
Freund, Hans-Joachim [2 ]
Giordano, Livia [1 ]
Di Valentin, Cristiana [1 ]
Pacchioni, Gianfranco [1 ]
机构：
[1] Univ Milano Bicocca, Dipartimento Sci Mat, I-20125 Milan, Italy
[2] Max Planck Gesell, Fritz Haber Inst, Dept Chem Phys, D-14195 Berlin, Germany
[3] Free Univ Berlin, Inst Chem & Biochem, D-14195 Berlin, Germany
来源：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2011年 / 50卷 / 11期
关键词：
heterogeneous catalysis; oxidation; oxygen activation; surface chemistry; thin films; PARAMAGNETIC-RESONANCE; SURFACE; EXCHANGE; DENSITY; ATOMS; MODEL;
D O I：
10.1002/anie.201005729
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Distortion is the key: In situ EPR spectroscopy provides the first experimental confirmation that the adsorption of O2 molecules on a stoichiometric ultrathin MgO(001) film on Mo(001) leads to the spontaneous formation of O2.- radicals. The results show that polaronic distortion of the MgO lattice (see picture; Mg yellow, O blue) stabilizes the radical, and this distortion is only possible in very thin films. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
引用
收藏
页码：2635 / 2638
页数：4
相关论文
共 50 条
  • [41] Surface structure and morphology of Mg-segregated epitaxial Fe3O4(001) thin films on MgO(001)
    Anderson, JF
    Kuhn, M
    Diebold, U
    Shaw, K
    Stoyanov, P
    Lind, D
    PHYSICAL REVIEW B, 1997, 56 (15): : 9902 - 9909
  • [42] Structural and Chemical Properties of NiOx Thin Films: Oxygen Vacancy Formation in O2 Atmosphere
    Blume, Raoul
    Calvet, Wolfram
    Ghafari, Aliakbar
    Mayer, Thomas
    Knop-Gericke, Axel
    Schloegl, Robert
    CHEMPHYSCHEM, 2023, 24 (23)
  • [43] Ion-induced secondary electron emission from MgO and Y2O3 thin films
    Ullah, Shakir
    Dogar, A. H.
    Mehmood, Nasir
    Hussain, Safeer
    Qayyum, A.
    VACUUM, 2009, 84 (05) : 509 - 513
  • [44] Growth process of CuO(111) and Cu2O(001) thin films on MgO(001) substrate under metal-mode condition by reactive dc-magnetron sputtering
    Itoh, Takahiro
    Maki, Kunisuke
    VACUUM, 2007, 81 (09) : 1068 - 1076
  • [45] Topotaxial formation of Mg4Nb2O9 and MgNb2O6 thin films on MgO (001) single crystals by vapor-solid reaction
    Sun, DC
    Senz, S
    Hesse, D
    JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2003, 86 (06) : 1049 - 1051
  • [46] OXYGEN ISOTOPE EXCHANGE BETWEEN O2 ADSORBATE AND UV-IRRADIATED MGO SURFACES
    YANAGISAWA, Y
    HUZIMURA, R
    MATSUMURA, K
    YAMABE, S
    SURFACE SCIENCE, 1991, 242 (1-3) : 513 - 517
  • [47] Structural phase diagram for ultra-thin epitaxial Fe3O4/MgO(001) films: thickness and oxygen pressure dependence
    Alraddadi, S.
    Hines, W.
    Yilmaz, T.
    Gu, G. D.
    Sinkovic, B.
    JOURNAL OF PHYSICS-CONDENSED MATTER, 2016, 28 (11)
  • [48] Giant Magnetoresistance and Anomalous Magnetic Properties of Highly Epitaxial Ferromagnetic LaBaCo2O5.5+δ Thin Films on (001) MgO
    Liu, Ming
    Ma, Chunrui
    Liu, Jian
    Collins, Gregory
    Chen, Chonglin
    He, Jie
    Jiang, Jiechao
    Meletis, Efstathios I.
    Sun, Li
    Jacobson, Allan J.
    Whangbo, Myung-Hwan
    ACS APPLIED MATERIALS & INTERFACES, 2012, 4 (10) : 5524 - 5528
  • [49] Pulsed laser deposition of Y2O3 thin films on MgO
    Gaboriaud, RJ
    Pailloux, F
    Perriere, J
    APPLIED SURFACE SCIENCE, 2002, 186 (1-4) : 477 - 482
  • [50] HRTEM and EELS study of Y2O3/MgO thin films
    Pailloux, F.
    Imhoff, D.
    Jublot, M.
    Paumier, F.
    Gaboriaud, R. J.
    Jaouen, M.
    MICRON, 2006, 37 (05) : 420 - 425
12345