Tantalum Nitride Nanorod Arrays: Introducing Ni--Fe Layered Double Hydroxides as a Cocatalyst Strongly Stabilizing Photoanodes in Water Splitting

Wang L, Dionigi F, Nguyen NT, Kirchgeorg R, Gliech M, Grigorescu SG, Strasser P, Schmuki P (2015)

Publication Type: Journal article

Publication year: 2015

Journal

Chemistry of Materials American Chemical Society

Book Volume: 27

Pages Range: 2360-2366

Journal Issue: 7

DOI: 10.1021/cm503887t

Abstract

Ta3N5 nanostructures are widely explored as anodes for photoelectrochemical (PEC) water splitting. Although the material shows excellent semiconductive properties for this purpose, the key challenge is its severe photocorrosion when used in typical aqueous environments. In the present work we introduce a NiFe layered double hydroxide (LDH) cocatalyst that dramatically reduces photocorrosion effects. To fabricate the Ta3N5 electrode, we use through-template anodization of Ta and obtain oxide nanorod arrays that then are converted to Ta3N5 by high temperature nitridation. After modification with our cocatalyst system, we obtained solar photocurrents of 6.3 mA cm--2 at 1.23 VRHE in 1 M KOH, and an electrode maintains about 80% of the initial activity for extended irradiation times.

Authors with CRIS profile

Lei Wang Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) (LKO) Nhat Truong Nguyen Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) (LKO) Robin Kirchgeorg Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) (LKO) Sabina Georgiana Grigorescu Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) (LKO) Patrik Schmuki Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) (LKO)

Additional Organisation(s)

Exzellenz-Cluster Engineering of Advanced Materials (EAM)

Involved external institutions

Technische Universität Berlin DE Germany (DE)

How to cite

APA:

Wang, L., Dionigi, F., Nguyen, N.T., Kirchgeorg, R., Gliech, M., Grigorescu, S.G.,... Schmuki, P. (2015). Tantalum Nitride Nanorod Arrays: Introducing Ni--Fe Layered Double Hydroxides as a Cocatalyst Strongly Stabilizing Photoanodes in Water Splitting. Chemistry of Materials, 27(7), 2360-2366. https://doi.org/10.1021/cm503887t

MLA:

Wang, Lei, et al. "Tantalum Nitride Nanorod Arrays: Introducing Ni--Fe Layered Double Hydroxides as a Cocatalyst Strongly Stabilizing Photoanodes in Water Splitting." Chemistry of Materials 27.7 (2015): 2360-2366.

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