Thermal air oxidation of Fe: rapid hematite nanowire growth and photoelectrochemical water splitting performance

Grigorescu SG, Lee CY, Lee K, Albu S, Paramasivam I, Demetrescu I, Schmuki P (2012)

Publication Type: Journal article

Publication year: 2012

Journal

Book Volume: 23

Pages Range: 59-62

DOI: 10.1016/j.elecom.2012.06.038

Abstract

Different iron oxide structures were formed by annealing of iron foils in air at temperatures between 500 °C to 800 °C. Depending on temperature, a significant variation in the hematite/magnetite ratio and a strongly temperature dependent morphology is obtained. While over a wide range of conditions more or less compact Fe3O4/Fe2O3 layers are obtained, at 600 °C rapid growth (several micrometer per hour) of highly crystalline hematite nanowires can be observed. Visible light photocurrent measurements in 1 M NaOH under AM 1.5 100 mW/cm2 conditions show that photocurrent density and the onset potential for water oxidation strongly shifted in the cathodic direction for the nanowire morphology. The results indicate that a simple air oxidation of iron can provide a rapid path to form hematite nanowires. Obtained layers are considerably active as photoanodes for solar water splitting.

Authors with CRIS profile

Additional Organisation(s)

Involved external institutions

Politechnic University of Bucharest / Universitatea Politehnica din București Romania (RO)

How to cite

APA:

Grigorescu, S.G., Lee, C.-Y., Lee, K., Albu, S., Paramasivam, I., Demetrescu, I., & Schmuki, P. (2012). Thermal air oxidation of Fe: rapid hematite nanowire growth and photoelectrochemical water splitting performance. Electrochemistry Communications, 23, 59-62. https://dx.doi.org/10.1016/j.elecom.2012.06.038

MLA:

Grigorescu, Sabina Georgiana, et al. "Thermal air oxidation of Fe: rapid hematite nanowire growth and photoelectrochemical water splitting performance." Electrochemistry Communications 23 (2012): 59-62.

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