Surface Stability of Pt3Ni Nanoparticulate Alloy Electrocatalysts in Hydrogen Adsorption

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F13%3A00394305" target="_blank" >RIV/61388955:_____/13:00394305 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1021/la401562t" target="_blank" >http://dx.doi.org/10.1021/la401562t</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/la401562t" target="_blank" >10.1021/la401562t</a>

Result language

angličtina

Original language name

Surface Stability of Pt3Ni Nanoparticulate Alloy Electrocatalysts in Hydrogen Adsorption

Original language description

Nanoparticles of Pt/Ni alloys represent state of the art electrocatalysts for fuel cell reactions. Density functional theory (DFT) based calculations along with in situ X-ray absorption spectroscopy (XAS) data show that the surface structure of Pt3Ni nanoparticulate alloys is potential-dependent during electrocatalytic reactions. Pt3Ni based electrocatalysts demonstrate preferential confinement of Ni to the subsurface when the electrode is polarized in the double layer region where the surface is free of specifically adsorbed species. Hydrogen adsorption triggers nickel segregation to the surface. This process is facilitated by a high local surface coverage of adsorbed hydrogen in the vicinity of the surface confined Ni due to an uneven distribution ofthe adsorbate(s) on the catalyst?s surface. The adsorption triggered surface segregation shows a non-monotonous dependence on the electrode potential and can be identified as a breathing of the catalyst as was proposed previously. The ob

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CF - Physical chemistry and theoretical chemistry

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2013

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Langmuir

ISSN

0743-7463

e-ISSN

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Volume of the periodical

29

Issue of the periodical within the volume

29

Country of publishing house

US - UNITED STATES

Number of pages

5

Pages from-to

9046-9050

UT code for WoS article

000322416700003

EID of the result in the Scopus database

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