Photochemical Production of Hydrogen from Alkaline Solution Containing Polysulfide Dyes

Sang Gi Lee; Jae-Hyun Kim; Sangwha Lee; Ho-In Lee

Korean Journal of Chemical Engineering, Vol.18, No.6, 894-897, November, 2001

DOI10.1007/BF02705614 Export Citation

Photochemical Production of Hydrogen from Alkaline Solution Containing Polysulfide Dyes

Sang Gi Lee, Jae-Hyun Kim¹, Sangwha Lee², and Ho-In Lee^{1, †}

LG Chemical Ltd., Research Park, Daejeon 305-380, Korea
¹School of Chemical Engineering, Seoul National University, Seoul 151-744, Korea
²Department of Chemical Engineering, Kyungwon University, Kyonggi-do 461-701, Korea

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Efficient hydrogen production was achieved by irradiating solutions containing polysulfide dyes as a photoabsorber. In the presence of polysulfide only, considerable amount of hydrogen was initially evolved and followed by the rapid decrease of the evolution rate. On the contrary, in the co-presence of NiOx(x<1)/TiO2 and polysulfide, steady evolution of hydrogen was observed even after long period of illumination. The photocatalytic evolution of hydrogen was divided into two stages: i) in the first stage within 1 hour irradiation, the hydrogen evolution rate was abruptly increased due to the conversion of polysulfide to partially oxidized sulfur, S2Ox2-; ii) in the secondary stage after 1 hour irradiation, steady evolution of hydrogen was observed due to the conversion of partially oxidized sulfur to fully oxidized sulfur. The oxidation/reduction of sulfur occurred more favorably over SiC catalyst where more steady evolution of hydrogen was achieved.

Keywords:Hole Scavenger;Polysulfide;NiO/TiO2;SiC;Hydrogen Evolution

[References]

Domen K, Naito SN, Onishi T, Tamaru K, Soma M, J. Phys. Chem., 86, 3657 (1982)
Fujishima A, Honda K, Nature, 238, 37 (1972)
Hashimoto K, Kawai T, Sakata T, Chem. Lett., 5, 709 (1983)
Kalyanasundaram K, Dung D, J. Phys. Chem., 84, 2551 (1980)
Kawai T, Sakata T, J. Chem. Soc.-Chem. Commun., 694 (1980)
Lee SG, Lee HI, Korean J. Chem. Eng., 15(5), 463 (1998)
Pellizetti E, Borgarello N, Serpone N, Gratzel M, "Catalysis on the Energy Scene," Studies in Surface Science and Catalysis, Kaliaguine, S. and Mahay, A., eds., Elsevier, Amsterdam (1984)
Pichat P, Hermann JM, Disdier J, Courbon H, Mozzanega MN, Nouv. J. Chim., 5, 627 (1981)
Rabek JF, "Experimental Methods in Photochemistry and Photophysics," John Wiley & Sons, New York (1982)
Sato S, New J. Chem., 12, 859 (1988)
Schiavello M, "Photocatalysis and Environment: Trends and Applications," Kluwer Academic Publishers, Dordrecht (1988)
Schwarzenbach G, Fischer A, Helv. Chim. Acta, 43, 3329 (1960)

[Referenced By]

[Related Articles]

[1] Domen K, Naito SN, Onishi T, Tamaru K, Soma M, J. Phys. Chem., 86, 3657 (1982)

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

[3] Hashimoto K, Kawai T, Sakata T, Chem. Lett., 5, 709 (1983)

[4] Kalyanasundaram K, Dung D, J. Phys. Chem., 84, 2551 (1980)

[5] Kawai T, Sakata T, J. Chem. Soc.-Chem. Commun., 694 (1980)

[6] Lee SG, Lee HI, Korean J. Chem. Eng., 15(5), 463 (1998)

[7] Pellizetti E, Borgarello N, Serpone N, Gratzel M, "Catalysis on the Energy Scene," Studies in Surface Science and Catalysis, Kaliaguine, S. and Mahay, A., eds., Elsevier, Amsterdam (1984)

[8] Pichat P, Hermann JM, Disdier J, Courbon H, Mozzanega MN, Nouv. J. Chim., 5, 627 (1981)

[9] Rabek JF, "Experimental Methods in Photochemistry and Photophysics," John Wiley & Sons, New York (1982)

[10] Sato S, New J. Chem., 12, 859 (1988)

[11] Schiavello M, "Photocatalysis and Environment: Trends and Applications," Kluwer Academic Publishers, Dordrecht (1988)

[12] Schwarzenbach G, Fischer A, Helv. Chim. Acta, 43, 3329 (1960)