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Intrinsic Catalytic Activity of Graphene Defects for the Co-II/III(bpy)(3) Dye-Sensitized Solar Cell Redox Mediator

Citation:

Roy-Mayhew, J. D. ; Pope, M. A. ; Punckt, C. ; Aksay, I. A. Intrinsic Catalytic Activity of Graphene Defects for the Co-II/III(bpy)(3) Dye-Sensitized Solar Cell Redox Mediator. ACS Applied Materials & Interfaces 2016, 8 9134-9141.

Date Published:

Apr

Type of Article:

Article

ISBN Number:

1944-8244

Accession Number:

WOS:000374274900033

Abstract:

We demonstrate that functionalized graphene, rich with lattice defects but lean with oxygen sites, catalyzes the reduction of Co-III(bpy)(3) as well as platinum does, exhibiting a rate of heterogeneous electron transfer, k(0), of similar to 6 x 10(-3) cm/s. We show this rate to be an order of magnitude higher than on oxygen-site-rich graphene oxide, and over 2 orders of magnitude higher than on the basal plane of graphite (as a surrogate for pristine graphene). Furthermore, dye-sensitized solar. cells using defect-rich graphene monolayers perform similarly to those using platinum nanoparticles as the catalyst.

Short Title:

ACS Appl. Mater. InterfacesACS Appl. Mater. Interfaces