Self-stabilized Pt-Rh bimetallic nanoclusters as durable electrocatalysts for dioxygen reduction in PEM fuel cells

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F14%3A33151742" target="_blank" >RIV/61989592:15310/14:33151742 - isvavai.cz</a>
Result on the web
<a href="http://pubs.rsc.org/en/content/articlepdf/2014/ra/c4ra08490j" target="_blank" >http://pubs.rsc.org/en/content/articlepdf/2014/ra/c4ra08490j</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/c4ra08490j" target="_blank" >10.1039/c4ra08490j</a>

Result language
angličtina
Original language name
Self-stabilized Pt-Rh bimetallic nanoclusters as durable electrocatalysts for dioxygen reduction in PEM fuel cells
Original language description
Self-stabilized Pt-Rh nanoclusters (NCs) were prepared by using a surfactant-free chemical reduction method with formic acid as the reducing agent. The elemental composition was determined by EDX analysis. The synthesized cluster was used as a supportless (SL) electrocatalyst for the reduction of oxygen (ORR) in acid medium. The composition of Pt-Rh bimetal NCs, in terms of atomic weight percentage, was optimized based on the available electrochemical surface area. Hydrodynamic linear scan voltammetricprofiles show that the onset potential for oxygen reduction is 0.78 V vs. RHE at the electrode rotation rate of 2400 rpm with 17.8 mu g cm(-2) loading of the SL Pt3Rh exhibiting the limiting current density of 3.5 mA cm(-2). The durability of the electrocatalysts was investigated by performing the accelerated durability test (ADT): the electrochemical surface area (ECSA) for SL Pt3Rh increased by nearly 9.2% while retaining nearly 85% of its initial limiting current density after 15 000
Czech name
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Czech description
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Type
J<sub>x</sub> - 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
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)

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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