Influence of LaFeO 3 Surface Termination on Water Reactivity
Journal Article
·
· Journal of Physical Chemistry Letters
The polarity of oxide surfaces can dramatically impact their surface reactivity, in particular with polar molecules such as water. The surface species that result from this interaction change the oxide electronic structure and chemical reactivity in applications such as photoelectrochemistry, but are challenging to probe experimentally with atomic-scale understanding. Here we report a detailed study of the surface chemistry and electronic structure of the perovskite LaFeO3 in humid conditions using ambient pressure X-ray photoelectron spectroscopy. Comparing the two possible terminations of the polar (001)-oriented surface, we find that the LaO surface is more reactive toward water, forming hydroxyl species and adsorbing molecular water at lower relative humidity than its FeO2-terminated counterpart. Our results demonstrate how the termination of a complex oxide can dramatically impact its reactivity, providing insight into the design of catalyst materials.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1347856
- Report Number(s):
- PNNL-SA-123478; 49306
- Journal Information:
- Journal of Physical Chemistry Letters, Journal Name: Journal of Physical Chemistry Letters Journal Issue: 5 Vol. 8; ISSN 1948-7185
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
Similar Records
Influence of LaFeO3 Surface Termination on Water Reactivity
Stabilization mechanisms of LaFeO3 (010) surfaces determined with first principles calculations
Journal Article
·
Thu Feb 16 00:00:00 UTC 2017
· Journal of Physical Chemistry Letters
·
OSTI ID:1343949
Stabilization mechanisms of LaFeO3 (010) surfaces determined with first principles calculations
Journal Article
·
Sat Jan 01 04:00:00 UTC 2011
· Journal of the American Ceramic Society
·
OSTI ID:1016039