Detail publikace

Rapid oxygen exchange between hematite and water vapor

JAKUB, Z. MEIER, M. KRAUSHOFER, F. BALAJKA, J. PAVELEC, J. SCHMID, M. FRANCHINI, C. DIEBOLD, U. PARKINSON, G.

Originální název

Rapid oxygen exchange between hematite and water vapor

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Oxygen exchange at oxide/liquid and oxide/gas interfaces is important in technology and environmental studies, as it is closely linked to both catalytic activity and material degradation. The atomic-scale details are mostly unknown, however, and are often ascribed to poorly defined defects in the crystal lattice. Here we show that even thermodynamically stable, well-ordered surfaces can be surprisingly reactive. Specifically, we show that all the 3-fold coordinated lattice oxygen atoms on a defect-free single-crystalline "r-cut" (1 (1) over bar 02) surface of hematite (alpha-Fe2O3) are exchanged with oxygen from surrounding water vapor within minutes at temperatures below 70 degrees C, while the atomic-scale surface structure is unperturbed by the process. A similar behavior is observed after liquid-water exposure, but the experimental data clearly show most of the exchange happens during desorption of the final monolayer, not during immersion. Density functional theory computations show that the exchange can happen during on-surface diffusion, where the cost of the lattice oxygen extraction is compensated by the stability of an HO-HOH-OH complex. Such insights into lattice oxygen stability are highly relevant for many research fields ranging from catalysis and hydrogen production to geochemistry and paleoclimatology.

Klíčová slova

atomic-scale view; low-temperature; isotope-exchange; oxide; adsorption; surface; stabilization; CO; dissociation; dissolution

Autoři

JAKUB, Z.; MEIER, M.; KRAUSHOFER, F.; BALAJKA, J.; PAVELEC, J.; SCHMID, M.; FRANCHINI, C.; DIEBOLD, U.; PARKINSON, G.

Vydáno

10. 11. 2021

Nakladatel

Nature Portfolio

Místo

BERLIN

ISSN

2041-1723

Periodikum

NATURE COMMUNICATIONS

Ročník

12

Číslo

1

Stát

Spojené království Velké Británie a Severního Irska

Strany od

1

Strany do

8

Strany počet

8

URL

https://www.nature.com/articles/s41467-021-26601-4

Plný text v Digitální knihovně

http://hdl.handle.net/11012/203101

BibTex

@article{BUT174929,
  author="Zdeněk {Jakub} and Matthias {Meier} and Florian {Kraushofer} and Jan {Balajka} and Jiří {Pavelec} and Michael {Schmid} and Cesare {Franchini} and Ulrike {Diebold} and Gareth S. {Parkinson}",
  title="Rapid oxygen exchange between hematite and water vapor",
  journal="NATURE COMMUNICATIONS",
  year="2021",
  volume="12",
  number="1",
  pages="1--8",
  doi="10.1038/s41467-021-26601-4",
  issn="2041-1723",
  url="https://www.nature.com/articles/s41467-021-26601-4"
}