Local structure and composition of PtRh nanoparticles produced through cathodic corrosion

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F17%3A00506647" target="_blank" >RIV/61388955:_____/17:00506647 - isvavai.cz</a>

Result on the web

<a href="http://hdl.handle.net/11104/0297853" target="_blank" >http://hdl.handle.net/11104/0297853</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/c7cp01059a" target="_blank" >10.1039/c7cp01059a</a>

Result language

angličtina

Original language name

Local structure and composition of PtRh nanoparticles produced through cathodic corrosion

Original language description

Alloy nanoparticles fulfill an important role in catalysis. As such, producing them in a simple and clean way is much desired. A promising alloy nanoparticle production method is cathodic corrosion, which generates particles by applying an AC voltage to an alloy electrode. However, this harsh AC potential program might affect the final elemental distribution of the nanoparticles. In this work, we address this issue by characterizing the time that is required to create 1 mu mol of Rh, Pt12Rh88, Pt55Rh45 and Pt nanoparticles under various applied potentials. The corrosion time measurements are complemented by structural characterization through transmission electron microscopy, X-ray diffraction and X-ray absorption spectroscopy. The corrosion times indicate that platinum and rhodium corrode at different rates and that the cathodic corrosion rates of the alloys are dominated by platinum. In addition, the structure-sensitive techniques reveal that the elemental distributions of the created alloy nanoparticles indeed exhibit small degrees of elemental segregation. These results indicate that the atomic alloy structure is not always preserved during cathodic corrosion.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10403 - Physical chemistry

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

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

Name of the periodical

Physical Chemistry Chemical Physics

ISSN

1463-9076

e-ISSN

1463-9084

Volume of the periodical

19

Issue of the periodical within the volume

16

Country of publishing house

GB - UNITED KINGDOM

Number of pages

8

Pages from-to

10301-10308

UT code for WoS article

000400117700011

EID of the result in the Scopus database

2-s2.0-85019969389