Authors
Zhenchao Xu, Haoxu Chang, Yihai Wu, Hongyu Li, Xinliu Zhou, Junxuan Yao, Tao Gan, Jiong Li, Yu Fu, Jun Zhang, Yuhan Sun
Published in
Small (Weinheim an der Bergstrasse, Germany). Pages e75696. Sep 09, 2026. Epub Sep 09, 2026.
Abstract
Catalytic active sites or centers could evolve from their initial form under realistic reaction conditions due to the autonomous behaviors of the constituent atoms to adapt to the surrounding environment. Controlling such adaptability of metal-oxide-based catalysts is crucial yet challenging for understanding catalyst dynamics and enabling rational catalyst design. Here, we report a dislocation-mediated strategy to steer the dynamic evolution of vanadium oxides by systematically tuning the lattice dislocation density of TiO2 supports. A combination of in situ Raman and DRIFTS reveals that in response to reaction conditions, dislocations of TiO2 enable the depolymerization of crystalline V2O5 into polymeric VOx species while simultaneously inducing charge redistribution through strong V─O─Ti interfacial polarization. Those polymeric, electrophilic VOx centers exhibit enhanced C─H activation ability, boosting selective oxidation of ethane to acetic acid via the Mars-van Krevelen mechanism. These findings provide a conceptual framework linking dislocation-induced lattice dynamics to catalytic function and highlight the potential of dislocation engineering as a feasible strategy for designing adaptive catalytic systems with tunable redox properties and structural resilience under operating conditions.
PMID:
42714235
Bibliographic data and abstract were imported from PubMed on 09 Sep 2026.
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