Strengthening Pt/WO x interfacial interactions to increase the CO tolerance of Pt for hydrogen oxidation reaction.

Here, the modulation of the Pt electronic structure by the formation of an amorphous WO x overlayer on Pt nanoparticles is proposed. The resulting Pt/WO x @NC electrode shows exceptional CO oxidation potential (0.24 V vs . RHE) in aqueous test, and the corresponding membrane electrode assembly (MEA) steadily generates power in fuel cells fed with H 2 gas containing 1000 ppm CO.