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Detailed Program
Paper Number : FU-P07
Time Frame : 12:00~13:30
Presentation Date : Thursday, 27, November
Session Name : Fuel cells and Batteries
Session Chair 1# : -
Session Chair 2# : -
Effects of graphene single layer on TiO2 nanorod/FTO electrode
Hyun Kim
School of Advanced Materials and System Engineering
Keywords: Graphene, TiO2 nanorod, Hydrogen

The Hydrogen production from solar water splitting has been considered as a solution to the energy and environmental issues. Splitting water into hydrogen and oxygen has been occured by stages, i) absorption of light, ii) electron-hole excitation, iii) charge transfer to reactive sites, iv) redox reaction. Among these stages, charge transfer stage is most important to lead the redox reaction of water. Graphene has been considered a new approach to improve the charge transfer rate without direct or indirect recombination [1]. In this work, graphene sheets were synthesized by chemical vapor deposition using methan source and then the sheets were directly transfered on the FTO glass. TiO2 nanorods were grown on graphene/FTO glass by hydrothermal method. The microstructural features of TiO2 nanorods/graphene/FTO photoanode were investigated by FE-SEM, TEM, XRD, Raman spectroscopy. Furthermore solar hydrogen production test was characterized in the PEC cells. In the results of those analysises, recombination of photo-excited electrons and holes was decreased by inserting graphene sheet between TiO2 nanorods and FTO substrates.
References:
[1] G. Xie and J. R. Gong, Adv. Mater, 25 (2013) p. 3820.
Acknowledgements : This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and future Planning (Grant No. 2014005324)