Origin of the Low Overpotential for Isopropanol Oxidation on Pt-Ru Electrocatalysts
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10492166" target="_blank" >RIV/00216208:11320/24:10492166 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=yZPZo.cy06" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=yZPZo.cy06</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acsenergylett.4c01987" target="_blank" >10.1021/acsenergylett.4c01987</a>
Alternative languages
Result language
angličtina
Original language name
Origin of the Low Overpotential for Isopropanol Oxidation on Pt-Ru Electrocatalysts
Original language description
Electrochemically active liquid organic hydrogen carrier (EC-LOHC) technology is an emerging solution for safe and environmentally friendly hydrogen storage and energy conversion based on the use of organic redox-active compounds, such as the isopropanol/acetone couple. In this work, we identify the nature of the active state of the Pt-Ru electrocatalyst that provides the lowest overpotential and, thus, the highest catalytic activity. Toward this aim we employed ex situ electrochemical synchrotron radiation photoelectron spectroscopy (SRPES) and scanning tunneling microscopy (STM) in combination with in situ electrochemical infrared reflection absorption spectroscopy (EC-IRRAS). We show that the lowest overpotentials are not observed for Pt-Ru surface alloys but only in the presence of ultrasmall metallic Pt aggregates formed by dealloying of Pt-Ru catalysts upon oxidation and reduction cycles between 0.0 and 1.5 V-RHE. By tuning the initial composition of the Pt-Ru surface alloy, we maximize the density of active Pt aggregates.
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
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
ACS Energy Letters
ISSN
2380-8195
e-ISSN
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Volume of the periodical
9
Issue of the periodical within the volume
10
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
4875-4882
UT code for WoS article
001315699000001
EID of the result in the Scopus database
2-s2.0-85205677642