The Potential-Dependent Structure of Pt3Ni Alloy Electrocatalysts and Its Effect on Electrocatalytic Activity
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10510641" target="_blank" >RIV/00216208:11320/25:10510641 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=J.XKhJgSFy" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=J.XKhJgSFy</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acscatal.5c02601" target="_blank" >10.1021/acscatal.5c02601</a>
Alternative languages
Result language
angličtina
Original language name
The Potential-Dependent Structure of Pt3Ni Alloy Electrocatalysts and Its Effect on Electrocatalytic Activity
Original language description
The distribution of elements within alloy nanoparticles is a critical parameter for their electrocatalytic performance. Here, we use the case of a Pt3Ni alloy to show that this elemental distribution can dynamically respond to the applied potential, leading to strongly potential-dependent catalytic properties. Starting from the Pt3Ni core and Pt shell structure that forms in acid electrolyte due to Ni leaching, our electrochemical X-ray photoelectron spectroscopy measurements show that the Ni atoms can be reversibly moved between the core of the particles and the near-surface region using the applied potential. Through potential jump measurements, we show that this Ni migration modulates the hydrogen evolution reaction activity of the particles by over 30%. These observations highlight the potential of incorporating in situ restructuring of alloys as the final step in electrocatalyst design.
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
ACS Catalysis
ISSN
2155-5435
e-ISSN
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Volume of the periodical
15
Issue of the periodical within the volume
15
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
12994-13002
UT code for WoS article
001530028200001
EID of the result in the Scopus database
2-s2.0-105013073735