Self-stabilized Pt-Rh bimetallic nanoclusters as durable electrocatalysts for dioxygen reduction in PEM fuel cells
Identifikátory výsledku
Kód výsledku v 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>
Výsledek na webu
<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>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Self-stabilized Pt-Rh bimetallic nanoclusters as durable electrocatalysts for dioxygen reduction in PEM fuel cells
Popis výsledku v původním jazyce
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
Název v anglickém jazyce
Self-stabilized Pt-Rh bimetallic nanoclusters as durable electrocatalysts for dioxygen reduction in PEM fuel cells
Popis výsledku anglicky
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
Klasifikace
Druh
J<sub>x</sub> - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
CEP obor
CF - Fyzikální chemie a teoretická chemie
OECD FORD obor
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Návaznosti výsledku
Projekt
Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2014
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
RSC Advances (online)
ISSN
2046-2069
e-ISSN
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Svazek periodika
4
Číslo periodika v rámci svazku
98
Stát vydavatele periodika
GB - Spojené království Velké Británie a Severního Irska
Počet stran výsledku
9
Strana od-do
55571-55579
Kód UT WoS článku
000344989800086
EID výsledku v databázi Scopus
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