Photoelectrochemical oxidation of methanol on oxide nanosheets

The Journal of Physical Chemistry. B
Kazuyoshi IzawaYasumichi Matsumoto

Abstract

Photoelectrochemical oxidation of alcohol on various nanosheet electrodes such as Nb6O17, Ca2Nb3O10, Ti(0.91)O2, Ti4O9, and MnO2 system host layers were measured to evaluate the photocatalysis of water photolysis with alcohol as a sacrificial agent. The nanosheet electrodes were prepared by the layer-by-layer (LBL) method, using electrostatic principles. The highest photooxidation current density was observed in methanol solution for Nb6O17 and Ca2Nb3O10 nanosheets, while the density was lower for Ti(0.91)O2, Ti4O9, and MnO2 nanosheets in decreasing order. The rank in the photocurrent density was in agreement with that in the photocatalytic activity, which means that the degree of photooxidation of the alcohol determines the activity of the alcohol in the water photolysis process. The photocurrent was independent of the number of nanosheet layers on the electrode, indicating that only the mono-nanosheet layer attached directly on a substrate acts as a photoelectrocatalyst and that the interlayer space is not important. Consequently, higher photooxidation current on the Nb6O17 mono-nanosheet layer means that the charge separation of electron and hole under illumination is very large and that the hole-capturing process by CH3OH i...Continue Reading

References

Mar 20, 2003·Journal of the American Chemical Society·Yoshitomo OmomoMamoru Watanabe

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Citations

Oct 19, 2006·Chemical Communications : Chem Comm·Shintaro IdaYasumichi Matsumoto
Jul 18, 2012·Proceedings of the National Academy of Sciences of the United States of America·Colleen M HanselSamuel M Webb
Mar 24, 2016·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Fatemeh Hashemzadeh
May 20, 2009·Dalton Transactions : an International Journal of Inorganic Chemistry·Angela Albuquerque Teixeira-NetoVera R Leopoldo Constantino
Oct 18, 2012·Chemical Society Reviews·Frank E Osterloh
Jul 27, 2020·Chemical Communications : Chem Comm·Keisuke Awaya, Shintaro Ida
May 17, 2011·Physical Chemistry Chemical Physics : PCCP·Chenghua SunSean C Smith
Jun 4, 2008·Physical Review Letters·Kideok D KwonGarrison Sposito
Oct 17, 2013·The Journal of Physical Chemistry Letters·M KanP Jena

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