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Media type:
E-Article
Title:
High-throughput exploration of activity and stability for identifying photoelectrochemical water splitting materials
Contributor:
Jenewein, Ken J.
[Author];
Thienhaus, Sigurd
[Author];
Kormányos, Attila
[Author];
Ludwig, Alfred
[Author];
Cherevko, Serhiy
[Author]
imprint:
RSC, 2022
Published in:Chemical science 13, 13774-13781 (2022). doi:10.1039/D2SC05115J
Language:
English
DOI:
https://doi.org/10.1039/D2SC05115J
ISSN:
2041-6520;
2041-6539
Origination:
Footnote:
Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
Description:
The experimental high-throughput (HT) exploration for a suitable solar water splitting photoanode hasgreatly relied on photoactivity as the sole descriptor to identify a promising region within the searchedcomposition space. Although activity is essential, it is not sufficient for describing the overallperformance and excludes other pertinent criteria for photoelectrochemical (PEC) water splitting.Photostability in the form of (photo)electrocatalyst dissolution must be tracked to illustrate the intricaterelation between activity and stability for multinary photoelectrocatalysts. To access these two importantmetrics simultaneously, an automated PEC scanning flow cell coupled to an inductively coupled plasmamass spectrometer (PEC-ICP-MS) was used to study an Fe–Ti–W–O thin film materials library. Theresults reveal an interrelation between composition, photocurrent density, and element-specificdissolution. These structure–activity–stability correlations can be represented using data science toolslike principal component analysis (PCA) in addition to common data visualization approaches. This studydemonstrates the importance of addressing two of the most important catalyst metrics (activity andstability) in a rapid and parallel fashion during HT experiments to adequately discover high-performingcompositions in the multidimensional search space.