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REDONDO, J. MICHALIČKA, J. KRAUSHOFER, F. FRANCESCHI, G. ŠMÍD, B. KUMAR, N. MAN, O. BLATNIK, M. WRANA, D. MALLADA, B. ŠVEC, M. PARKINSON, G. SETVÍN, M. RIVA, M. DIEBOLD, U. ČECHAL, J.
Originální název
Hematite α-Fe2O3(0001) in Top and Side View: Resolving Long-Standing Controversies about Its Surface Structure
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
Hematite is a common iron oxide found in nature, and the alpha-Fe2O3(0001) plane is prevalent on the nanomaterial utilized in photo- and electrocatalytic applications. The atomic-scale structure of the surface remains controversial despite decades of study, partly because it depends on sample history as well as the preparation conditions. Here, a comprehensive study is performed using an arsenal of surface techniques (non-contact atomic force microscopy, scanning tunneling microscopy, low-energy electron diffraction, and X-ray photoemission spectroscopy) complemented by analyses of the near surface region by high-resolution transmission electron microscopy and electron energy loss spectroscopy. The results show that the so-called "bi-phase" termination forms even under highly oxidizing conditions; a (1 x 1) surface is only observed in the presence of impurities. Furthermore, it is shown that the biphase is actually a continuous layer distorted due to a mismatch with the subsurface layers, and thus not the proposed mixture of FeO(111) and alpha-Fe2O3(0001) phases. Overall, the results show how combining surface and cross-sectional imaging provides a full view that can be essential for understanding the role of the near-surface region on oxide surface properties.
Klíčová slova
iron oxide; nc-AFM; surface structure; TEM; XPS
Autoři
REDONDO, J.; MICHALIČKA, J.; KRAUSHOFER, F.; FRANCESCHI, G.; ŠMÍD, B.; KUMAR, N.; MAN, O.; BLATNIK, M.; WRANA, D.; MALLADA, B.; ŠVEC, M.; PARKINSON, G.; SETVÍN, M.; RIVA, M.; DIEBOLD, U.; ČECHAL, J.
Vydáno
1. 11. 2023
Nakladatel
WILEY
Místo
HOBOKEN
ISSN
2196-7350
Periodikum
Advanced Materials Interfaces
Ročník
10
Číslo
32
Stát
Spolková republika Německo
Strany počet
9
URL
https://onlinelibrary.wiley.com/doi/10.1002/admi.202300602
BibTex
@article{BUT188696, author="Jesús {Redondo} and Jan {Michalička} and Florian {Kraushofer} and Giada {Franceschi} and Břetislav {Šmíd} and Nishant {Kumar} and Ondřej {Man} and Matthias {Blatnik} and Dominik {Wrana} and Benjamin {Mallada} and Martin {Švec} and Gareth S. {Parkinson} and Martin {Setvín} and Michele {Riva} and Ulrike {Diebold} and Jan {Čechal}", title="Hematite α-Fe2O3(0001) in Top and Side View: Resolving Long-Standing Controversies about Its Surface Structure", journal="Advanced Materials Interfaces", year="2023", volume="10", number="32", pages="9", doi="10.1002/admi.202300602", issn="2196-7350", url="https://onlinelibrary.wiley.com/doi/10.1002/admi.202300602" }