@article{109966,
  keywords = {Electrocatalysis, materials science, graphene, graphite oxide, sheets, Science \& Technology - Other Topics, glassy-carbon electrodes, raman-spectroscopy, dye-sensitized solar cell, catalytic activity, rate constant, heterogeneous electron transfer, cobalt redox mediator, electron-transfer kinetics, functionalized, counter electrodes, electrochemical performance, low-cost, films},
  author = {J. D. Roy-Mayhew and M. A. Pope and C. Punckt and I.A. Aksay},
  title = {Intrinsic Catalytic Activity of Graphene Defects for the Co-II/III(bpy)(3) Dye-Sensitized Solar Cell Redox Mediator},
  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. },
  year = {2016},
  journal = {ACS Applied Materials \& Interfaces},
  volume = {8},
  number = {14},
  pages = {9134-9141},
  month = {04/2016},
  isbn = {1944-8244},
  language = {English},
}