Hematite α-Fe2O3(0001) in Top and Side View: Resolving Long-Standing Controversies about Its Surface Structure

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F23%3APU151404" target="_blank" >RIV/00216305:26620/23:PU151404 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/23:00583874 RIV/00216208:11320/23:10477102 RIV/00216305:26620/26:0188696

Výsledek na webu

<a href="https://onlinelibrary.wiley.com/doi/10.1002/admi.202300602" target="_blank" >https://onlinelibrary.wiley.com/doi/10.1002/admi.202300602</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/admi.202300602" target="_blank" >10.1002/admi.202300602</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Hematite α-Fe2O3(0001) in Top and Side View: Resolving Long-Standing Controversies about Its Surface Structure

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Hematite α-Fe2O3(0001) in Top and Side View: Resolving Long-Standing Controversies about Its Surface Structure

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Advanced Materials Interfaces

ISSN

2196-7350

e-ISSN

—

Svazek periodika

10

Číslo periodika v rámci svazku

32

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

9

Strana od-do

„“-„“

Kód UT WoS článku

001159240100001

EID výsledku v databázi Scopus

2-s2.0-85168394306