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Issue 29, 2018
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Titanium(iv) oxide having a copper co-catalyst: a new type of semihydrogenation photocatalyst working efficiently at an elevated temperature under hydrogen-free and poison-free conditions

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Abstract

A copper-loaded titanium(IV) oxide photocatalyst exhibited perfect selectivity in hydrogenation of alkynes to alkenes in an alcohol solution at 298 K under hydrogen-free and poison-free conditions. A slight elevation in the reaction temperature to 323 K greatly increased the reaction rate with the selectivity being preserved and the formation of an H2 by-product being suppressed. The apparent activation energy of 4-octyne semihydrogenation was determined to be 54 kJ mol−1, indicating that the rate determining step of this photocatalytic reaction was not an electron production process but a thermocatalytic hydrogenation process under light irradiation.

Graphical abstract: Titanium(iv) oxide having a copper co-catalyst: a new type of semihydrogenation photocatalyst working efficiently at an elevated temperature under hydrogen-free and poison-free conditions

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Article information


Submitted
11 Apr 2018
Accepted
21 May 2018
First published
21 May 2018

Phys. Chem. Chem. Phys., 2018,20, 19321-19325
Article type
Communication

Titanium(IV) oxide having a copper co-catalyst: a new type of semihydrogenation photocatalyst working efficiently at an elevated temperature under hydrogen-free and poison-free conditions

H. Kominami, M. Shiba, A. Hashimoto, S. Imai, K. Nakanishi, A. Tanaka, K. Hashimoto and K. Imamura, Phys. Chem. Chem. Phys., 2018, 20, 19321
DOI: 10.1039/C8CP02316F

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