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Comments on “Interlayer Atomic Voids by Partial Cesium Defect in Layered Titanate Activate Photo(electro)catalytic H2 and O2 Generation”
Author(s)
Date Issued
March 23, 2026
Type
Note
Abstract
Üstünel et al. ( ACS Appl. Energy Mater., DOI:10.1021/acsaem.5c01514) recently proposed the interesting concept of interlayer Cs voids formation in lepidocrocite-type Cs2Ti6O13. This was accomplished via treatment of the titanate with an aqueous solution of cetyltrimethylammonium bromide, followed by heat treatment at 700 °C. We present an alternative explanation focusing on: (i) unintended proton exchange from the medium; and (ii) subsequent thermal dehydration/dehydroxylation to anatase and “defective Cs2Ti6O13”. Our interpretation based on the classical chemistry of layered materials is consistent with their experimental results.
Citation
ACS Applied Energy Materials, 9(6), 2928-2930, 2026