Preparation of PtRu/C Electrocatalysts Using Citric Acid as Reducing Agent and OH- ions as Stabilizing Agent for Direct Alcohol Fuel Cell (DAFC)

PtRu/C electrocatalysts (Pt:Ru atomic ratio of 50:50 and 80:20) were prepared using citric acid as reducing agent and OH- ions as stabilizing agent. The obtained electrocatalysts were characterized by energy dispersive X-ray analysis and transmission electron microscopy. The electro-oxidation of met...

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Bibliographic Details
Published inInternational journal of electrochemical science Vol. 4; no. 7; pp. 954 - 961
Main Authors Neto, A.O., Verjulio-Silva, R.W.R., Linardi, M., Spinacé, E.V.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.07.2009
Subjects
citric acid
ethanol oxidation
fuel cell
methanol oxidation
PtRu/C
citric acid
methanol oxidation
fuel cell
ethanol oxidation
PtRu/C
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Summary:PtRu/C electrocatalysts (Pt:Ru atomic ratio of 50:50 and 80:20) were prepared using citric acid as reducing agent and OH- ions as stabilizing agent. The obtained electrocatalysts were characterized by energy dispersive X-ray analysis and transmission electron microscopy. The electro-oxidation of methanol and ethanol were studied at room temperature by chronoamperometry. Studies on the Direct Methanol Fuel Cell (DMFC) and Direct Ethanol Fuel Cell (DEFC) were carried at 90°C. For both electrocatalysts the obtained Pt:Ru atomic ratios were similar to the nominal ones and the average particles sizes were around 2.5 nm. The chronoamperometry and DAFC experiments showed that the electrocatalyst prepared with Pt:Ru atomic ratio of 80:20 has a superior performance for methanol oxidation, while the electrocatalyst prepared with Pt:Ru atomic ratio of 50:50 has a superior performance for ethanol oxidation.
ISSN:1452-3981
1452-3981
DOI:10.1016/S1452-3981(23)15198-4