NANDENHA, J.NAGAHAMA, I.H.F.YAMASHITA, J.Y.FONTES, E.H.AYOUB, J.M.S.SOUZA, R.F.B. deFONSECA, F.C.NETO, A.O.2020-02-212020-02-212019NANDENHA, J.; NAGAHAMA, I.H.F.; YAMASHITA, J.Y.; FONTES, E.H.; AYOUB, J.M.S.; SOUZA, R.F.B. de; FONSECA, F.C.; NETO, A.O. Activation of methane on PdZn/C electrocatalysts in an acidic electrolyte at low temperatures. <b>International Journal of Electrochemical Science</b>, v. 14, n. 12, p. 10819-10834, 2019. DOI: <a href="https://dx.doi.org/10.20964/2019.12.76">10.20964/2019.12.76</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/30819.1452-3981http://repositorio.ipen.br/handle/123456789/30819PdZn/C electrocatalysts were prepared by sodium borohydride utilized as reducing agent for activation methane in an acidic medium at room temperature and in a proton exchange membrane fuel cell (PEMFC) at 80°C. The materials prepared were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The diffractograms of the PdZn/C electrocatalysts showed only peaks associated with Pd face-centered cubic (fcc) structure. Cyclic voltammograms (CV) of all electrocatalysts after adsorption of methane shown an increment in current during the anodic scan, this effect was more pronounced for Pd(70)Zn(30)/C. In situ ATR-FTIR (Attenuated Total Reflectance-Fourier Transform Infrared) experiments was not observed the formation of intermediates adsorbed for PdZn/C electrocatalysts, this behavior indicated that the methane oxidation occurs by parallel mechanisms. Polarization curves at 80°C in PEMFC show that Pd(90)Zn(10)/C has superior performance over the other electrocatalysts in methane oxidation.10819-10834openAccessmethanepalladiumzincelectrocatalystssodium compoundsborohydridesreductionoxidationpolarizationelectrolytesdiagramsArtigo de periódico121410.20964/2019.12.760000-0001-8745-34210000-0003-0708-2021https://orcid.org/0000-0002-9287-6071https://orcid.org/0000-0003-0708-202120.37044.00