No abstract

In this work, the use of the electrochemical deposit PtAg on the glassy carbon modified with graphene (PtAg/G) is proposed. The electrochemical test (Rotatory Disc Electrode, RDE) showed a better performance to reduce oxygen for PtAg/G compared to a similar material obtained in Vulcan carbon (PtAg/V). The reduction potential is around 0.82 V versus RHE in PtAg/G compared to 0.77 V versus RHE in PtAg/V. The PtAg/G has a smaller particle size, this was attributable to the better distribution of active graphene sites.