Intrinsic Catalytic Activity of Graphene Defects for the CoII/III(bpy)3 Dye-Sensitized Solar Cell Redox Mediator
Source abstract
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, k0, of ∼6 × 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.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: TiO2 Photocatalysis and Solar Cells · Advanced Photocatalysis Techniques · Electrochemical sensors and biosensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States
Vorbeck Princeton Research Center, Vorbeck Materials Corporation, 11 Deerpark Drive, Suite 203, Monmouth Junction, New Jersey 08852, United States
Funding
Division of Graduate Education · Pacific Northwest National Laboratory
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