Photocatalytic production of oxygen in a dual bed system using a reversible redox mediator on Ir-TiO2 catalyst

Woo Seok Nam; Eun Young Kim; Gui Young Han

Korean Journal of Chemical Engineering, Vol.25, No.6, 1355-1357, November, 2008

DOI10.1007/s11814-008-0222-z Export Citation

Photocatalytic production of oxygen in a dual bed system using a reversible redox mediator on Ir-TiO2 catalyst

Woo Seok Nam, Eun Young Kim, and Gui Young Han^†

Department of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Korea

E-mail:

Photocatalytic O2 evolution by water splitting in an alkaline solution with a redox mediator was investigated in a dual bed system configuration: one bed was used for oxygen evolution and the other for hydrogen evolution. The employed photocatalyst was Ir-TiO2 and the iodate ion, KIO3, was used as a redox mediator. In order to find the optimum conditions for oxygen evolution, the effect of alkaline concentration, KIO3 concentration and the amount of Ir loading on the photocatalytic reactivity was examined in an irradiation area of 0.055 m2 reactor with a 400 W U.V. lamp. The experimentally obtained results showed that oxygen evolution depends on the concentration of the alkaline solution, the potassium iodate concentration and the amount of Ir loading.

Keywords:Anatase;Iodate;Ir-TiO2;Redox Mediator;Rutile

[References]

Fujishima A, Honda K, Nature, 238, 37 (1972)
Sato S, J. Photochem. Photobiol. A: Chem., 45, 361 (1988)
Liu YC, Griffin GL, Chan SS, Wachs IE, J. Catal, 94, 108 (1985)
Kudo A, Tanaka A, Domen K, Maruya K, Aida K, Onishi T, J. Catal, 111, 67 (1988)
Reyes P, Rojas H, Fierro JLG, Appl. Catal. A: Gen., 248(1-2), 59 (2003)
Abe R, Sayama K, Arakawa H, Chem. Phys. Lett., 371(3-4), 360 (2003)
Teratani S, Nakamichi J, Taya K, Tanaka K, Bull. Chem. Soc. Jap., 55, 1688 (1982)
Linkous CA, Slattery DK, Ouelette AJA, Mckaige GT, Austin BCN, Int J hydrogen energy, Progress XI, proceedings of the 11th World Hydrogen Energy Conf, 3, 2545 (1996)
Lee K, Nam W, Han GY, Int. J. Hydrogen Energy, 29, 1343 (2004)
Abe R, Sayama K, Domen K, Arakawa H, Chem. Phys. Lett., 344(3-4), 339 (2001)
Bamwenda GR, Tsubota S, Nakamura T, Haruta M, J. Photochem. Photobiol. A: Chem., 89, 177 (1995)
Abe R, Hara K, Sayama K, Domen K, Arakawa H, J. Photochem. Photobiol. A: Chem., 137, 63 (2000)
Sayama K, Mukasa K, Abe R, Abe Y, Arakawa H, J. Photochem. Photobiol. A: Chem., 148, 71 (2002)
Vaidyanathan H, Robbins K, Rao GM, J. Power. Sources, 63, 7 (1996)
Karakitsou K, Verykios XE, J. Catal., 152(2), 360 (1995)
Bak T, Nowotny J, Rekas M, Sorrell CC, Int. J. Hydrogen Energy, 27, 991 (2002)

[Related Articles]

[1] Fujishima A, Honda K, Nature, 238, 37 (1972)

[2] Sato S, J. Photochem. Photobiol. A: Chem., 45, 361 (1988)

[3] Liu YC, Griffin GL, Chan SS, Wachs IE, J. Catal, 94, 108 (1985)

[4] Kudo A, Tanaka A, Domen K, Maruya K, Aida K, Onishi T, J. Catal, 111, 67 (1988)

[5] Reyes P, Rojas H, Fierro JLG, Appl. Catal. A: Gen., 248(1-2), 59 (2003)

[6] Abe R, Sayama K, Arakawa H, Chem. Phys. Lett., 371(3-4), 360 (2003)

[7] Teratani S, Nakamichi J, Taya K, Tanaka K, Bull. Chem. Soc. Jap., 55, 1688 (1982)

[8] Linkous CA, Slattery DK, Ouelette AJA, Mckaige GT, Austin BCN, Int J hydrogen energy, Progress XI, proceedings of the 11th World Hydrogen Energy Conf, 3, 2545 (1996)

[9] Lee K, Nam W, Han GY, Int. J. Hydrogen Energy, 29, 1343 (2004)

[10] Abe R, Sayama K, Domen K, Arakawa H, Chem. Phys. Lett., 344(3-4), 339 (2001)

[11] Bamwenda GR, Tsubota S, Nakamura T, Haruta M, J. Photochem. Photobiol. A: Chem., 89, 177 (1995)

[12] Abe R, Hara K, Sayama K, Domen K, Arakawa H, J. Photochem. Photobiol. A: Chem., 137, 63 (2000)

[13] Sayama K, Mukasa K, Abe R, Abe Y, Arakawa H, J. Photochem. Photobiol. A: Chem., 148, 71 (2002)

[14] Vaidyanathan H, Robbins K, Rao GM, J. Power. Sources, 63, 7 (1996)

[15] Karakitsou K, Verykios XE, J. Catal., 152(2), 360 (1995)

[16] Bak T, Nowotny J, Rekas M, Sorrell CC, Int. J. Hydrogen Energy, 27, 991 (2002)