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Catalysts 2014, 4(2), 162-173; doi:10.3390/catal4020162

Neighboring Hetero-Atom Assistance of Sacrificial Amines to Hydrogen Evolution Using Pt-Loaded TiO2-Photocatalyst

1
Department of Applied Chemistry, Faculty of Engineering, University of Miyazaki, Gakuen-Kibanadai Nishi, Miyazaki 889-2192, Japan
2
Center for Collaborative Research and Community Cooperation, University of Miyazaki, Gakuen-Kibanadai Nishi, Miyazaki 889-2192, Japan
*
Author to whom correspondence should be addressed.
Received: 27 February 2014 / Revised: 12 May 2014 / Accepted: 13 May 2014 / Published: 26 May 2014
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Abstract

Photocatalytic H2 evolution was examined using Pt-loaded TiO2-photocatalyst in the presence of amines as sacrificial agents. In the case of amines with all of the carbon attached to the hetero-atom such as 2-aminoethanol, 1,2-diamonoethane, 2-amino-1,3-propanediol, and 3-amino-1,2-propanediol, they were completely decomposed into CO2 and water to quantitatively evolve H2. On the other hand, the amines with both hetero-atoms and one methyl group at the β-positions (neighboring carbons) of amino group such as 2-amino-1-propanol and 1,2-diaminopropane were partially decomposed. Also, the photocatalytic H2 evolution using amines without the hetero-atoms at the β-positions such as ethylamine, propylamine, 1-butylamine, 1,3-diaminopropane, 2-propylamine, and 2-butylamine was inefficient. Thus, it was found that the neighboring hetero-atom strongly assisted the degradation of sacrificial amines. Moreover, rate constants for H2 evolution were compared among amines. In conclusion, the neighboring hetero-atom did not affect the rate constants but enhanced the yield of hydrogen evolution. View Full-Text
Keywords: TiO2; photocatalytic hydrogen evolution; amines; structural dependence of sacrificial agents; neighboring hetero-atom assistance; kinetic analysis TiO2; photocatalytic hydrogen evolution; amines; structural dependence of sacrificial agents; neighboring hetero-atom assistance; kinetic analysis
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Yasuda, M.; Tomo, T.; Hirata, S.; Shiragami, T.; Matsumoto, T. Neighboring Hetero-Atom Assistance of Sacrificial Amines to Hydrogen Evolution Using Pt-Loaded TiO2-Photocatalyst. Catalysts 2014, 4, 162-173.

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