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Among the issues inherent to fuel cells, the high cost of the Pt electrocatalyst restricts its widespread application. Controlling nano-or subnano-material structures could improve the utilization of Pt. Here, the catalytic activity of the oxygen reduction reaction (ORR) on Pt monatomic wire that is supported on the zigzag edges of graphene nanoribbon (Pt-GNR) is studied using density functional theory. It is found that Pt-GNR is inert for ORR, due to the strong binding of OH and H 2 O.doi:10.1039/c4ra03387f fatcat:lvl5trjst5ekpht5wdphhlk5oa