Fatima Haydous^1*, Max Doebeli², Wenpig Si^1*, Friedrich Waag³, Fei Li¹, Ekaterina Pomjakushina^1*, Alexander Wokaun⁴, Bibal Gökce³, Daniele Pergolesi^1*, Thomas Lippert^1*

1 Division for Research with Neutrons and Muons, Paul Scherrer Institut (PSI), 5232 Villigen, Switzerland

2 Ion Beam Physics, ETH Zürich, 8093 Zürich, Switzerland

3 Center for Nanointegration Duisburg-Essen, Technical Chemistry I, University of Duisburg-Essen, 45141 Essen, Germany

4 Energy and Environment Research Division, Paul Scherrer Institut (PSI), 5232 Villigen, Switzerland

* Corresponding authors emails: fatime.haydous@psi.ch, wenping.si@psi.ch, ekaterina.pomjakushina@psi.ch, daniele.pergolesi@psi.ch, thomas.lippert@psi.ch

DOI10.24435/materialscloud:p7-yt [version v1]

Publication date: Nov 25, 2020

How to cite this record

Fatima Haydous, Max Doebeli, Wenpig Si, Friedrich Waag, Fei Li, Ekaterina Pomjakushina, Alexander Wokaun, Bibal Gökce, Daniele Pergolesi, Thomas Lippert, Oxynitride thin films versus particle-based photoanodes: a comparative study for photoelectrochemical solar water splitting, Materials Cloud Archive 2020.151 (2020), doi: 10.24435/materialscloud:p7-yt.

Description

The solar water splitting process assisted by semiconductor photocatalysts attracts growing research interests worldwide for the production of hydrogen as a clean and sustainable energy carrier. Due to their optical and electrical properties several oxynitride materials show great promise for the fabrication of efficient photocatalysts for solar water splitting. This study reports a comparative investigation of particle- and thin films-based photocatalysts using three different oxynitride materials. The absolute comparison of the photoelectrochemical activities favors the particle-based electrodes due to the better absorption properties and larger electrochemical surface area. However, thin films surpass the particle-based photoelectrodes due to their more suitable morphological features that improve the separation and mobility of the photo-generated charge carriers. Our analysis identifies what specific insights into the properties of materials can be achieved with the two complementary approaches.

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Keywords

oxynitride photoanode solar water splitting MARVEL pulsed laser deposition solar fuel