OLIVEIRA NETO, A.VERJULIO SILVA, R.W.R.LINARDI, M.SPINACE, E.V.2014-07-152014-07-302014-07-152014-07-302009OLIVEIRA NETO, A.; VERJULIO SILVA, R.W.R.; LINARDI, M.; SPINACE, E.V. Preparation of PtRu/C electrocatalysts using citric acid as reducing agent and OH- ions as stabilizing agent for direct alcohol fuel cell (DAFC). <b>International Journal of Electrochemical Science</b>, v. 4, n. 7, p. 954-961, 2009. DOI: <a href="https://dx.doi.org/10.1016/s1452-3981(23)15198-4">10.1016/s1452-3981(23)15198-4</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/4855.1452-3981http://repositorio.ipen.br/handle/123456789/4855PtRu/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.954-961openAccesselectrocatalystsplatinumrutheniumcarbonmethanolethanoloxidationcitric aciddirect methanol fuel cellsx-ray diffractiontransmission electron microscopyamperometryArtigo de periódico7410.1016/s1452-3981(23)15198-4https://orcid.org/0000-0003-0105-6519https://orcid.org/0000-0002-7011-8261https://orcid.org/0000-0002-9287-6071