Photocatalytic water oxidation with iron oxide hydroxide (rust) nanoparticles

Timothy L. Shelton; Bronwyn L. Bensema; Nicholas K. Brune; Christopher Wong; Max Yeh; Frank E. Osterloh

doi:10.1117/1.JPE.7.012003

16 August 2016 Photocatalytic water oxidation with iron oxide hydroxide (rust) nanoparticles

Timothy L. Shelton, Bronwyn L. Bensema, Nicholas K. Brune, Christopher Wong, Max Yeh, Frank E. Osterloh

Author Affiliations +

Journal of Photonics for Energy, Vol. 7, Issue 1, 012003 (August 2016). https://doi.org/10.1117/1.JPE.7.012003

Abstract

Hematite has attracted considerable interest as a photoanode material for water oxidation under visible illumination. Here, we explore the limits of photocatalytic water oxidation activity with iron (III) oxide hydroxide nanocrystals and NaIO 4 as a sacrificial electron acceptor ( E = 1.63 V NHE at pH = 0.5 ). The sol was prepared by hydrolysis of FeCl 3 in boiling 0.002-M HCl solution and confirmed to mainly consist of ß - FeO ( OH ) (akaganéite) particles with 5 to 15 nm diameter. From a 0.01 M aqueous NaIO 4 solution, the sol evolves between 4.5 and 35.2 μ mol O 2 h − 1 , depending on pH, light intensity ( > 400 nm , 290 to 700 mW cm

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Timothy L. Shelton, Bronwyn L. Bensema, Nicholas K. Brune, Christopher Wong, Max Yeh, and Frank E. Osterloh "Photocatalytic water oxidation with iron oxide hydroxide (rust) nanoparticles," Journal of Photonics for Energy 7(1), 012003 (16 August 2016). https://doi.org/10.1117/1.JPE.7.012003

Published: 16 August 2016

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