Adsorption and Thermal Stability of Phenylphosphonic Acid on Cerium Oxides
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10510545" target="_blank" >RIV/00216208:11320/25:10510545 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=MuR3vzHaXW" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=MuR3vzHaXW</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.jpcc.5c04065" target="_blank" >10.1021/acs.jpcc.5c04065</a>
Alternative languages
Result language
angličtina
Original language name
Adsorption and Thermal Stability of Phenylphosphonic Acid on Cerium Oxides
Original language description
This paper reports on a study of the adsorption and thermal stability of phenylphosphonic acid (PPA) adsorbed by physical vapor deposition on the surfaces of epitaxial cerium oxide films of different structure, stoichiometry and composition. Advanced analytical methods based on photoelectron spectroscopy combined with DFT calculations showed that the binding of PPA to cerium oxide is through the phosphonate group, while the decomposition temperature is defined by the nature of the oxide. Tridentate PPA species are present on all substrates (CeO2, CeO1.7, Ce2O3, and Ce6WO12), indicating a strong affinity of PPA for cerium oxide. The presence of vacancies in the oxide influences the molecular orientation. The phenyl ring of the PPA tilts about 10 degrees more toward the surface plane of the reduced cerium oxides compared to CeO2, which is attributed to the adsorption of phosphonate groups on Ce4+ and Ce3+ cations. The PPA adlayer is more stable on the surfaces with higher concentrations of oxygen vacancies and/or Ce3+ cations, increasing the temperature to initiate cleavage of the P-C bond from 225 degrees C for PPA/CeO2 to 350 degrees C for the other systems. The PPA decomposition is signaled by the desorption of carbonaceous species above a critical temperature, while the phosphorus species remain stable even after annealing at 450 degrees C for all the cerium oxides. Overall, the results provide a comprehensive understanding of the binding of PPA to cerium oxides, allowing further development of functionalization strategies for inorganic materials by phosphonic acids.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Physical Chemistry C
ISSN
1932-7447
e-ISSN
1932-7455
Volume of the periodical
129
Issue of the periodical within the volume
34
Country of publishing house
US - UNITED STATES
Number of pages
17
Pages from-to
15265-15281
UT code for WoS article
001549277800001
EID of the result in the Scopus database
2-s2.0-105024936719