Does the Surface Structure of Oxide Affect the Strong Metal-Support Interaction with Platinum? Platinum on Fe3O4(001) versus Fe3O4(111)

被引：23
作者：
Zhang, Ke [1 ]
Shaikhutdinov, Shamil [1 ]
Freund, Hans-Joachim [1 ]
机构：
[1] Max Planck Gesell, Fritz Haber Inst, Abt Chem Phys, D-14195 Berlin, Germany
来源：
CHEMCATCHEM | 2015年 / 7卷 / 22期
关键词：
iron; platinum; supported catalysts; surface analysis; thin films; SCANNING-TUNNELING-MICROSCOPY; MODEL CATALYST; CO ADSORPTION; GROWTH; MAGNETITE; PT(100); AU; TIO2(110); FILMS; WATER;
D O I：
10.1002/cctc.201500328
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We studied the structure and thermal stability of Pt deposited on a Fe3O4(001) thin film to make a comparison with the Pt/Fe3O4(111) system that shows a strong metal-support interaction (SMSI) through encapsulation. Pt adatoms interact strongly with the (2x2)R45 degrees-reconstructed Fe3O4(001) surface and adsorb monoatomically on the narrow sites. Metal sintering sets in only above 700K to result in cuboid Pt nanoparticles exposing primarily (100) and (110) facets. Concomitantly, CO adsorption on Pt is fully suppressed as a result of the SMSI. The results provided strong evidence that the Pt nanoparticles on Fe3O4(001) are encapsulated by an FeO(111) layer in the same manner as observed for hemispherical Pt particles on Fe3O4(111). The comparison suggests that the SMSI effect through encapsulation is insensitive to the surface structure of the oxide, although the latter strongly affects the particle morphology.
引用
收藏
页码：3725 / 3730
页数：6
相关论文
共 43 条
[1]   Some recent results on metal/support interaction effects in NM/CeO2 (NM: noble metal) catalysts [J].
Bernal, S ;
Calvino, JJ ;
Cauqui, MA ;
Gatica, JM ;
Larese, C ;
Omil, JAP ;
Pintado, JM .
CATALYSIS TODAY, 1999, 50 (02) :175-206
[2]   Subsurface cation vacancy stabilization of the magnetite (001) surface [J].
Bliem, R. ;
McDermott, E. ;
Ferstl, P. ;
Setvin, M. ;
Gamba, O. ;
Pavelec, J. ;
Schneider, M. A. ;
Schmid, M. ;
Diebold, U. ;
Blaha, P. ;
Hammer, L. ;
Parkinson, G. S. .
SCIENCE, 2014, 346 (6214) :1215-1218
[3]   Cluster Nucleation and Growth from a Highly Supersaturated Adatom Phase: Silver on Magnetite [J].
Bliem, Roland ;
Kosak, Rukan ;
Perneczky, Lukas ;
Novotny, Zbynek ;
Gamba, Oscar ;
Fobes, David ;
Mao, Zhiqiang ;
Schmid, Michael ;
Blaha, Peter ;
Diebold, Ulrike ;
Parkinson, Gareth S. .
ACS NANO, 2014, 8 (07) :7531-7537
[4]   Model catalyst studies of the strong metal-support interaction:: Surface structure identified by STM on Pd nanoparticles on TiO2(110) [J].
Bowker, M ;
Stone, P ;
Morrall, P ;
Smith, R ;
Bennett, R ;
Perkins, N ;
Kvon, R ;
Pang, C ;
Fourre, E ;
Hall, M .
JOURNAL OF CATALYSIS, 2005, 234 (01) :172-181
[5]   Molecular scale investigations of the reactivity of magnetite with formic acid, pyridine, and carbon tetrachloride [J].
Cutting, Richard S. ;
Muryn, Chris A. ;
Thornton, Geoffrey ;
Vaughan, David J. .
GEOCHIMICA ET COSMOCHIMICA ACTA, 2006, 70 (14) :3593-3612
[6]   Growth of Fe3O4(001) thin films on Pt(100): Tuning surface termination with an Fe buffer layer [J].
Davis, Earl M. ;
Zhang, Ke ;
Cui, Yi ;
Kuhlenbeck, Helmut ;
Shaikhutdinov, Shamil ;
Freund, Hans-Joachim .
SURFACE SCIENCE, 2015, 636 :42-46
[7]   Imaging cluster surfaces with atomic resolution:: The strong metal-support interaction state of Pt supported on TiO2(110) [J].
Dulub, O ;
Hebenstreit, W ;
Diebold, U .
PHYSICAL REVIEW LETTERS, 2000, 84 (16) :3646-3649
[8]   Epitaxial growth of Au and Pt on Fe3O4(111) surface [J].
Gatel, C. ;
Snoeck, E. .
SURFACE SCIENCE, 2007, 601 (04) :1031-1039
[9]   Comparative study of Pt, Au and Ag growth on Fe3O4(001) surface [J].
Gatel, C. ;
Snoeck, E. .
SURFACE SCIENCE, 2006, 600 (13) :2650-2662
[10]   Initial nucleation of Au on the (√2 X √2)R45○ reconstructed Fe3O4(001) surface [J].
Jordan, K. ;
Murphy, S. ;
Shvets, I. V. .
SURFACE SCIENCE, 2006, 600 (24) :5150-5157
12345