We performed a quantum dynamics study on the proton-like hydrogen (H⁺) transmission from the platinum (Pt) electrode to the Nafion side chain. In particular, we calculated the transmission probability (T_p) for H⁺ from the Pt side to the Nafion side using the coupled-channel method via the local reflection (LORE) matrix scheme and plotted T_p as a function of the H⁺ initial translational energy. Our results showed that without quantum effects, H⁺ transmission across the Pt-Nafion interface will be impossible to proceed at the operating temperatures (i.e. 353-373 K) of conventional fuel cells. We also found that the asymmetric nature of the barrier in the system we considered enhances the transmission. [DOI: 10.1380/ejssnt.2006.640]