Linking morphology with activity through the lifetime of pretreated PtNi nanostructured thin film catalysts - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Materials Chemistry A Année : 2015

Linking morphology with activity through the lifetime of pretreated PtNi nanostructured thin film catalysts

Résumé

The nanoscale morphology of highly active Pt3Ni7 nanostructured thin film fuel cell catalysts is linked with catalyst surface area and activity following catalyst pretreatments, conditioning and potential cycling. The significant role of fuel cell conditioning on the structure and composition of these extended surface catalysts is demonstrated by high resolution imaging, elemental mapping and tomography. The dissolution of Ni during fuel cell conditioning leads to highly complex, porous structures which were visualized in 3D by electron tomography. Quantification of the rendered surfaces following catalyst pretreatment, conditioning, and cycling shows the important role pore structure plays in surface area, activity, and durability.

Dates et versions

hal-01589396 , version 1 (18-09-2017)

Identifiants

Citer

D. A. Cullen, Miguel Lopez-Haro, Pascale Bayle-Guillemaud, Laure Guétaz, M. K. Debe, et al.. Linking morphology with activity through the lifetime of pretreated PtNi nanostructured thin film catalysts. Journal of Materials Chemistry A, 2015, 3 (21), pp.11660-11667. ⟨10.1039/c5ta01854d⟩. ⟨hal-01589396⟩
73 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More