Interface-confined triangular FeOx nanoclusters on Pt(111)
Under the oxidizing condition, the cheap metal component of bimetallic catalysts often segregates to the surface and forms oxide nanoclusters (NCs) supported on the metal surface, which exhibit unique structures and catalytic properties drastically different from the corresponding bulk materials. Here, density functional theory calculations are employed to describe the atomic and electronic structures of a series of triangular FeOx NCs confined on Pt(111) with the size ranging from ~0.3 nm to ~2.2 nm, which behave differently from the FeO film reported previously. The lattice of supported FeOx NCs on Pt(111) is found to vary not only with the NC size but also with the Fe/O ratio or the edge termination. Owing to a strong FeOx–Pt interaction, the heterogeneous distribution of local atomic and electronic structures of Fe across the FeOx NC is observed, though most of Fe atoms are positioned at the threefold hollow site of Pt(111). Furthermore, our study not only sheds light on the catalytically active sites of supported FeOx NCs but also provides guidance for the design of highly active and stable oxide nanocatalysts under reactive environment.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division
- Grant/Contract Number:
- SC0012704; 2017YFB0602205; 121421KYSB20150016
- OSTI ID:
- 1579498
- Alternate ID(s):
- OSTI ID: 1577219
- Report Number(s):
- BNL-212408-2019-JAAM; TRN: US2102673
- Journal Information:
- Journal of Chemical Physics, Vol. 151, Issue 21; ISSN 0021-9606
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Similar Records
The Atomic Structural Dynamics of γ-Al2O3 Supported Ir–Pt Nanocluster Catalysts Prepared from a Bimetallic Molecular Precursor: A Study Using Aberration-Corrected Electron Microscopy and X-ray Absorption Spectroscopy
Direct Visualization of Catalytically Active Sites at the FeO–Pt(111) Interface