Abstract
In the present study, the possibility to use Ti/RuO2 electrode as capacitor for storage of photoelectrons generated under UV irradiation in Ti/TiO2 photoelectrode has been investigated. A light-sensitive TiO2 layer has been formed by means of anodizing Ti electrode in the solution of 0.5 M H2SO4. A layer of RuO2, exhibiting the properties of electrochemical capacitor, has been formed by means of thermal decomposition of RuOHCl3 also on Ti substrate. The photocharging capability of RuO2 has been studied by means of short-circuiting Ti/RuO2 electrode with Ti/TiO2 photoelectrode in deaerated solution of 0.1 M KOH. It has been shown that the intensity of photocurrent flowing from Ti/TiO2 to Ti/RuO2 electrode depends mainly on the potential of the latter. Maximum value of photocurrent density was ∼180 μA cm−2, which corresponded to maximum value of photon-to-electron conversion efficiency (IPCE) of about 60%. The amount of photogenerated charge Q ph, which can be stored, depends on the capacitance of RuO2 coating. Under the conditions of the experiment, Q ph ranged from ∼35 to ∼50 mC, which corresponded to a specific charge of RuO2 coating ranging between ∼20 and ∼30 mAh g−1.
Similar content being viewed by others
References
Kamat PV (2007) J Phys Chem 111:2834
Wang CT, Huang HH (2008) J Non-Cryst Solids 28:3336. doi:10.1016/j.jnoncrysol.2008.02.005
Tatsuma T, Saitoh S, Ohko Y, Fujishima A (2001) Chem Mater 13:2838. doi:10.1021/cm010024k
Akuto K, Sakurai Y (2001) J Electrochem Soc 148:A121. doi:10.1149/1.1339867
Akuto K, Takahashi M, Sakurai Y (2001) J Power Sources 103:72. doi:10.1016/S0378-7753(01)00834-5
Subasri R, Shinohara T (2003) Electrochem Commun 5:897. doi:10.1016/j.elecom.2003.08.016
Ngaotrakanwiwat P, Tatsuma T (2004) J Electroanal Chem 573:236. doi:10.1016/j.jelechem.2004.07.012
Fujishima A, Zhang X, Tryk AD (2008) Surf Sci Rep 63:515. doi:10.1016/j.surfrep.2008.10.001
Linsebigler AL, Lu G, Yates JT Jr (1995) Chem Rev 95:735. doi:10.1021/cr00035a013
Ni M, Leung MKH, Leung DYC, Sumathy K (2007) Renew Sust Ener Rev 11:401. doi:10.1016/j.rser.2005.01.009
Nowotny J, Bak T, Nowotny MK, Sheppard LR (2007) Int J Hydrogen Energy 32:2609. doi:10.1016/j.ijhydene.2006.09.004
Kawakita J, Shinohara T, Kuroda S, Suzuki M, Sodeka S (2008) Surf Coat Tech 202:4028. doi:10.1016/j.surfcoat.2008.02.006
Takahashi Y, Ngaotrakanwiwat P, Tatsuma T (2004) Electrochim Acta 49:2025. doi:10.1016/j.electacta.2003.12.032
Trasatti S (1980) Electrodes of conductive metallic oxides, Parts A, B. Elsevier, Amsterdam
Hu CC, Chen WC (2004) Electrochim Acta 49:3469. doi:10.1016/j.electacta.2004.03.017
Beranek R, Hildebrand H, Schmuki P (2003) Solid State Lett 6:B12. doi:10.1149/1.1545192
Choi JS, Wehspohn RB, Lee J, Gosele U (2004) Electrochim Acta 49:2645. doi:10.1016/j.electacta.2004.02.015
Poznyak SK, Talapin DV, Kulak AI (2005) J Electroanal Chem 579:299. doi:10.1016/j.jelechem.2005.03.002
Sugimoto W, Yokoshima K, Murakami Y, Takasu Y (2006) Electrochim Acta 52:1742. doi:10.1016/j.electacta.2006.02.054
Gujar TP, Shinde VR, Lokhande DC, Kim WY, Jung KD, Joo OS (2007) Electrochem Commun 9:504. doi:10.1016/j.elecom.2006.10.017
Zheng JP, Cygan PJ, Jow TR (1995) J Electrochem Soc 142:2699. doi:10.1149/1.2050077
Juodkazis K, Juodkazytė J, Šukienė V, Grigucevičienė A, Selskis A (2008) J Solid State Electrochem 12:1399. doi:10.1007/s10008-007-0476-0
Juodkazytė J, Vilkauskaitė R, Šebeka B, Juodkazis K (2007) Trans IMF 4:1
Chang CC, Wen TC (1997) Mater Chem Phys 47:203. doi:10.1016/S0254-0584(97)80052-1
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Juodkazytė, J., Šebeka, B., Kalinauskas, P. et al. Light energy accumulation using Ti/RuO2 electrode as capacitor. J Solid State Electrochem 14, 741–746 (2010). https://doi.org/10.1007/s10008-009-0843-0
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10008-009-0843-0