Formation of Rh islands on Pd-supported α-Fe2O3 (0001)

被引：6
|
作者：
Pancotti, A. [1 ]
Abreu, G. J. P. [2 ]
Wang, J. L. [3 ]
Ferreira, A. V. M. [1 ]
Landers, R. [4 ]
de Siervo, A. [4 ]
机构：
[1] Univ Fed Goias, Unidade Acad Especial Ciencias Exatas & Tecnol, Campus Jatai,Rod Br 364,Km 168, Jatai, GO, Brazil
[2] Univ Fed Parana, Dept Fis, Caixa Postal 19044, BR-81531980 Curitiba, Parana, Brazil
[3] Donghua Univ, Coll Sci, Shanghai 201620, Peoples R China
[4] Univ Estadual Campinas, Inst Fis GlebWataghin, BR-13083859 Campinas, SP, Brazil
来源：
CRYSTENGCOMM | 2017年 / 19卷 / 15期
关键词：
IRON-OXIDE FILMS; PHOTOELECTRON DIFFRACTION; ATOMIC-STRUCTURE; NOBLE-METALS; CATALYSTS; OXIDATION; REDUCTION; PLATINUM; WATER; XPS;
D O I：
10.1039/c6ce02485h
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A rhodium ultra-thin film was deposited on a Pd-supported alpha-Fe2O3 (0001) film by molecular beam epitaxy (MBE). The surface atomic and electronic structures were studied using X-ray photoelectron diffraction (XPD), X-ray photoelectron spectroscopy (XPS), and low energy electron diffraction (LEED). For an oxide thin film (similar to 16.5 angstrom), an ordered (root 3 x root 3)R30 degrees structure was observed. The multiple scattering calculation approach combined with a genetic algorithm for surface structure optimization was used to investigate precisely the atomic structure of the oxide support as well as the Rh nanoislands or nanoparticles (NPs). Rh exhibited 3D growth on an alpha-Fe2O3 thin film forming NPs with a lattice constant expanded by 5.26% relative to the Rh bulk value. The coexistence of 60 degrees rotated domains and also evidence of Fe termination at the surface of alpha-Fe2O3 were observed.
引用
收藏
页码：2089 / 2095
页数：7
相关论文
共 50 条
  • [1] Water adsorption and O-defect formation on Fe2O3(0001) surfaces
    Ovcharenko, Roman
    Voloshina, Elena
    Sauer, Joachim
    PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2016, 18 (36) : 25560 - 25568
  • [2] The reducibility of Fe2O3 and supported Ru/Fe2O3 catalysts
    Józwiak, WK
    Maniecki, TP
    Gebauer, D
    PRZEMYSL CHEMICZNY, 2003, 82 (03): : 134 - 137
  • [3] Oxidation mechanism and ferryl domain formation on the α-Fe2O3 (0001) surface
    Jarvis, Emily A.
    Chaka, Anne M.
    SURFACE SCIENCE, 2007, 601 (09) : 1909 - 1914
  • [4] Surface properties of clean and Au or Pd covered hematite (α-Fe2O3) (0001)
    Kiejna, Adam
    Pabisiak, Tomasz
    JOURNAL OF PHYSICS-CONDENSED MATTER, 2012, 24 (09)
  • [5] A density functional study of oxygen vacancy formation on α-Fe2O3(0001) surface and the effect of supported Au nanoparticles
    Hoh, Soon Wen
    Thomas, Liam
    Jones, Glenn
    Willock, David J.
    RESEARCH ON CHEMICAL INTERMEDIATES, 2015, 41 (12) : 9587 - 9601
  • [6] A density functional study of oxygen vacancy formation on α-Fe2O3(0001) surface and the effect of supported Au nanoparticles
    Soon Wen Hoh
    Liam Thomas
    Glenn Jones
    David J. Willock
    Research on Chemical Intermediates, 2015, 41 : 9587 - 9601
  • [7] Stability of Hydroxylated α-Fe2O3(0001) Surfaces
    Chen, Jiachen
    Sharapa, Dmitry I.
    Plessow, Philipp N.
    ACS OMEGA, 2024, 9 (33): : 35449 - 35457
  • [8] Interaction of water with the Fe2O3(0001) surface
    Schoettner, Ludger
    Nefedov, Alexei
    Wang, Yuemin
    Woell, Christof
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2017, 254
  • [9] Role of La2O3 in Pd-supported catalysts for methanol decomposition
    Yang, C
    Ren, J
    Sun, YH
    CATALYSIS LETTERS, 2002, 84 (1-2) : 123 - 129
  • [10] Role of La2O3 in Pd-Supported Catalysts for Methanol Decomposition
    Cheng Yang
    Jie Ren
    Yuhan Sun
    Catalysis Letters, 2002, 84 : 123 - 129
12345