Summary In this study, it is aimed to examine the effect of multi‐walled carbon nanotube doped graphene nanoplatelet (MWCNT‐GNP) supported PtPd bimetallic catalyst on the performance of the high‐temperature proton‐exchange membrane fuel cell (HT‐PEMFC). In addition, PtPd/GNP and PtPd/MWCNT bimetallic catalysts were also investigated for performance comparison. The characterizations of these catalysts were examined by ICP‐MS, XRD, HR‐TEM, and TGA analysis. The electrochemical characterizations of the catalysts were performed for both cyclic voltammetry (CV) and CO stripping experiments, as well as HT‐PEMFC tests. The specific surface area (SSA) for PtPd/GNP and PtPd/MWCNT catalysts was obtained as 148 and 137 m2/g, respectively, while the highest SSA was achieved as 164 m2/g for PtPd/MWCNT‐GNP. The performance of the catalysts was confirmed with the HT‐PEMFC tests, based on the H2/air and reformate gas/air experiments. The electrocatalytic results display that PdPt bimetallic catalysts exhibited higher catalytic property than that of commercial Pt/C catalyst. The highest performance was achieved with PtPd/MWCNT‐GNP catalyst as 0.390 and 0.310 W/cm2 at 160°C for H2/air and reformat/air, respectively. The obtained results indicate that the PtPd/MWCNT‐GNP catalyst is appropriate for HT‐PEMFC operations.