Stability of multifunctional Pd-Rh electrocatalysts supported on Co3O4(111) in alkaline environment: impact of the electronic metal-support interaction
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10501148" target="_blank" >RIV/00216208:11320/25:10501148 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=qyvAmr98Xq" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=qyvAmr98Xq</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d5nr00413f" target="_blank" >10.1039/d5nr00413f</a>
Alternative languages
Result language
angličtina
Original language name
Stability of multifunctional Pd-Rh electrocatalysts supported on Co3O4(111) in alkaline environment: impact of the electronic metal-support interaction
Original language description
The stabilities of monometallic Rh and Pd nanoparticles and bimetallic Pd-Rh core-shell nanoparticles supported on Co3O4(111) thin films grown on Ir(100) were investigated with respect to the oxidation state and dissolution in alkaline electrolyte under the conditions relevant for electrochemical ethanol oxidation. Towards this aim, the well-defined model systems were characterized by means of synchrotron radiation photoelectron spectroscopy coupled with an ex situ emersion electrochemical cell (EC-SRPES) and scanning tunneling microscopy (STM). We found that the electronic metal-support interaction (EMSI) has a strong influence on the oxidation state of Rh, resulting in a strong oxidation and anchoring of the oxidized Rh3+ species on the surface of Co3O4(111). Consequently, the EMSI prevents the dissolution of Rh into the electrolyte regardless of the potential range. In contrast, it has no effect on the oxidation state and dissolution of Pd in the potential range of 0.3-1.1 VRHE. However, extending the potential range to 0.3-1.5 VRHE results in a stronger dissolution of Pd due to the reversible oxidation/reduction of Pd, which is enhanced in the presence of the EMSI. Most importantly, the magnitude of the EMSI and, thus, the extent of noble metal oxidation, can be effectively controlled by the nature of the metal/Co3O4(111) interface in the bimetallic Pd-Rh core-shell nanoparticles.
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
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
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
Nanoscale
ISSN
2040-3364
e-ISSN
2040-3372
Volume of the periodical
17
Issue of the periodical within the volume
18
Country of publishing house
GB - UNITED KINGDOM
Number of pages
12
Pages from-to
11679-11690
UT code for WoS article
001471747300001
EID of the result in the Scopus database
2-s2.0-105003750746