Journal
JOURNAL OF CATALYSIS
Volume 357, Issue -, Pages 147-153Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2017.10.019
Keywords
Dehydrogenation of benzyl alcohol; Hydrogen evolution; Photocatalysis; Benzyl alcohol oxidation
Categories
Funding
- National Key Research and Development Program of China [2017YFA0402800]
- National Natural Science Foundation of China [51772285, 21473170]
- Fundamental Research Funds for the Central Universities
Ask authors/readers for more resources
Photocatalytic hydrogen evolution coupled with selective oxidation to produce fine chemicals under mild conditions is a promising strategy for green synthesis of both fuel carriers and useful materials. Herein, we report a highly efficient catalyst, created by in-situ anchoring cobalt nanoparticles onto cadmium sulfide nanorods, for simultaneous hydrogen evolution and benzaldehyde production from photocatalytic dehydrogenation of benzyl alcohol under visible light. Two half reactions, hydrogen evolution and benzaldehyde production, are well coupled as the reductive side and oxidative side, respectively. The system can produces hydrogen and benzaldehyde with high selectivity and efficiency. The optimal selectivity for benzaldehyde production is similar to 94.4%. Mechanism studies indicate that the carbon-centered radical is the key intermediate during the oxidation of benzyl alcohol and plays a very important role on the selectivity for benzaldehyde production. Under optimal conditions, the rate of hydrogen evolution in the present noble-metal-free system is similar to 848 mu mol h(-1) and an apparent quantum yield of 63.2% (lambda = 420 +/- 5 nm) is achieved. To the best of our knowledge, this is the highest value ever reported for hydrogen evolution from photocatalytic dehydrogenation of benzyl alcohol under visible light. (C) 2017 Elsevier Inc. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available