Universität zu Köln

Bialuschewski, Danny, Hoppius, Jan S., Frohnhoven, Robert, Deo, Meenal, Gonullu, Yakup, Fischer, Thomas, Gurevich, Evgeny L. and Mathur, Sanjay (2018). Laser-Textured Metal Substrates as Photoanodes for Enhanced PEC Water Splitting Reactions. Adv. Eng. Mater., 20 (9). WEINHEIM: WILEY-V C H VERLAG GMBH. ISSN 1527-2648

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Abstract

We demonstrate the effect of femtosecond laser structuring of titanium substrates to increase the absorption, photoconversion, and overall photoelectrochemical water splitting (PEC) performance compared to pristine metal substrates, independent of any additional top coat layers. The influence of ultra short laser pulse patterning on PEC efficiency is investigated toward spectroscopic (UV-Vis), microscopic (SEM), crystallographic (XRD), and compositional (XPS) properties. The beneficial effect of a periodically patterned substrate is attributed to enhanced specific surface area and improved in-plane light trapping when compared to flat surfaces. Photoanodes for water splitting experiments fabricated by titanium and iron oxide films on laser pre-patterned Ti substrates are also found to show enhanced PEC efficiency (0.057 mA cm(-2)) when compared to unpatterened substrates (0.028 mA cm(-2)). The lower absolute PEC efficiencies are due to extreme thin films.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Bialuschewski, Danny UNSPECIFIED UNSPECIFIED UNSPECIFIED Hoppius, Jan S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Frohnhoven, Robert UNSPECIFIED UNSPECIFIED UNSPECIFIED Deo, Meenal UNSPECIFIED UNSPECIFIED UNSPECIFIED Gonullu, Yakup UNSPECIFIED UNSPECIFIED UNSPECIFIED Fischer, Thomas UNSPECIFIED UNSPECIFIED UNSPECIFIED Gurevich, Evgeny L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-174335
DOI:	10.1002/adem.201800167
Journal or Publication Title:	Adv. Eng. Mater.
Volume:	20
Number:	9
Date:	2018
Publisher:	WILEY-V C H VERLAG GMBH
Place of Publication:	WEINHEIM
ISSN:	1527-2648
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Inorganic Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CHEMICAL-VAPOR-DEPOSITION; TIO2 THIN-FILMS; SURFACES; ANATASE; PULSES; PICOSECOND; HYDROGEN; ENERGY; CELLS; LIGHT Multiple languages Materials Science, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/17433