Studies on the Stability of Pt/K₂La₂Ti₃O₁₀ Photocatalytic Hydrogen Evolution

Abstract:

Pt/K₂La₂Ti₃O₁₀ was prepared by impregnating K₂La₂Ti₃O₁₀ into H₂PtCl₆ solution. The structure of the photocatalyst was studied by means of XRD, UV-Vis spectroscopy and XPS. And the photocatalytic activities of the samples were examined in a Pyrex reaction cell by splitting methanol solution. The result revealed that Pt/K₂La₂Ti₃O₁₀ photocatalyst showed much higher activity than pure K₂La₂Ti₃O₁₀ and kept a high photocatalytic activity even after 120 hours of illumination. XPS showed that the valence state of Pt was reduced from Pt to Pt⁰ during the illumination.

• Periodical: Advanced Materials Research (Volumes 233-235)
• Pages: 1646-1649
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.233-235.1646
• Online since: May 2011
• Authors: Wen Quan Cui, Yue Li Qi, Jun Cheng, Jin Shan Hu, Ying Hua Liang
• Keywords: Hydrogen, Photocatalytic, Pt/K2La2Ti3O10, Stability

References

[1] Fujishima A, Honda K. Electrochemical photolysis of water at a semiconductor electrode. Nature,1972, 238: 37-38

DOI: 10.1038/238037a0

[2] WQ Cui, LR Feng, CH Xu, SJ Lü, FL Qiu. Hydrogen Production by Photocatalytic Decomposition of Methanol Gas on TiO2 film. Chinese J. Catal., 2003(12): 937-941

DOI: 10.1016/j.catcom.2004.06.011

[3] Kato H, Kudo A. Visible-Light-Response and Photocatalytic Activities of TiO2 and SrTiO3 Photocatalysts Codoped with Antimony and Chromium. J Phys Chem B, 2002,106(19): 5029-5034

DOI: 10.1021/jp0255482

[4] Kato H, Hori M, Konta R, Shimodaira Y, Kudo A. Construction of Z-scheme Type Heterogeneous Photocatalysis Systems for Water Splitting into H2 and O2 under Visible Light Irradiation. Chem Lett, 2004, 33(10):1348-1349

DOI: 10.1246/cl.2004.1348

[5] Ishii T, Kato H, Kudo A. H2 evolution from an aqueous methanol solution on SrTiO3 photocatalysts codoped with chromium and tantalum ions under visible light irradiation. J Photochem Photobiol A: Chem, 2004,163(1-2):181-186

DOI: 10.1016/s1010-6030(03)00442-8

[6] Takata T, Shinohara K, Tanaka A, Hara M, Kondo J N, Domen K. A highly active photocatalyst for overall water splitting with a hydrated layered perovskite structure. J Photochem Photobiol A: Chem, 1997,106(1-3): 45-49

DOI: 10.1016/s1010-6030(97)00037-3

[7] WQ Cui, LR Feng, CH Xu, SJ Lü, FL Qiu. Hydrogen Production by Photocatalytic Decomposition of methanol gas on Pt/TiO2 nano-film. Catal Comm, 2004 (5): 533-536

DOI: 10.1016/j.catcom.2004.06.011

[8] Wenquan Cui; Li Liu; Feng Liangrong. Science in China Ser. B. Chemistry, 2006, 36(2): 139~144

[9] Gopalakrishnan J, Bhat V. A2Ln2Ti3O10 (A = potassium or rubidium; Ln = lanthanum or rare earth): a new series of layered perovskites exhibiting ion exchange. Inorg Chem, 1987, 26: 4299-4301 a

DOI: 10.1021/ic00273a001

[10] WQ Cui, LR Feng, CH Xu, SJ Lü, FL Qiu. Studies on the Photo-catalytic Decomposition of Methanol Vapor on Pt-loaded nano-TiO2 Particles. Acta Chim Sinica, 2005, 63(3): 203-209(In Chinese)

[11] Fox M A, Dulay M Y. Heterogeneous Photocatalysis. Chem Rev, 1993, 93(1): 341-357 Kudo A, Sakata T. Luminescent Properties of Nondoped and Rare Earth Metal Ion-Doped K2La2Ti3O10 with Layered Perovskite Structures: Importance of the Hole Trap Process. J Phys Chem, 1995,99: 15963-15967

DOI: 10.1021/j100043a040