SANTOS, M.C.L.OTTONI, C.A.SOUZA, R.F.B. deSILVA, S.G. daASSUMPÇAO, M.H.M.T.SPINACE, E.V.NETO, A.O.2017-01-192017-01-192016SANTOS, M.C.L.; OTTONI, C.A.; SOUZA, R.F.B. de; SILVA, S.G. da; ASSUMPÇAO, M.H.M.T.; SPINACE, E.V.; NETO, A.O. Methanol oxidation in alkaline medium using PtIn/C electrocatalysts. <b>Electrocatalysis</b>, v. 7, n. 6, p. 445-450, 2016. DOI: <a href="https://dx.doi.org/10.1007/s12678-016-0324-z">10.1007/s12678-016-0324-z</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/27003.1868-2529http://repositorio.ipen.br/handle/123456789/27003Pt/C and PtIn/C with atomic ratios of 90:10, 70:30, and 50:50 were investigated for methanol electro-oxidation in alkaline media by using cyclic voltammetry (CV), chronoamperometry (CA), and direct methanol alkaline fuel cell (DMAFC). All electrocatalysts were synthesized using sodium borohydride method with 20 wt% of metals loading on carbon. X-ray diffraction (XRD) analysis revealed that bimetallic PtIn had faced centered cubic structure and, also, confirmed alloy formation for PtIn/C nanoparticles. Transmission electron micrographs showed metal nanoparticles with average particle size between 3.0 and 5.0 nm; however, the particle size increases when the In content was increased in PtIn/C. In the CV experiments, the onset potential of methanol electro-oxidation shifted to lower values as the indium content increased. Chronoamperometry experiments and direct methanol alkaline fuel cell suggested PtIn/C (70:30) as the most promising material for methanol electrooxidation: this result could be explained by the presence of Pt and In in close contact (electronic effect) as the occurrence of oxy-hydroxy interactions.445-450openAccessmethanoloxidationhydroxideselectrocatalystsx-ray diffractionArtigo de periódico6710.1007/s12678-016-0324-zhttps://orcid.org/0000-0002-9287-6071https://orcid.org/0000-0002-7011-826168.41