Visualizing H2O molecules reacting at TiO2 active sites with transmission electron microscopy

Wentao Yuan, Beien Zhu, Xiao Yan Li, Thomas Willum Hansen, Yang Ou, Ke Fang, Hangsheng Yang, Ze Zhang*, Jakob Birkedal Wagner*, Yi Gao*, Yong Wang*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Imaging a reaction taking place at the molecular level could provide direct information for understanding the catalytic reaction mechanism. We used in situ environmental transmission electron microscopy and a nanocrystalline anatase titanium dioxide (001) surface with (1 × 4) reconstruction as a catalyst, which provided highly ordered four-coordinated titanium “active rows” to realize real-time monitoring of water molecules dissociating and reacting on the catalyst surface. The twin-protrusion configuration of adsorbed water was observed. During the water–gas shift reaction, dynamic changes in these structures were visualized on these active rows at the molecular level.
Original languageEnglish
JournalScience
Volume367
Issue number6476
Pages (from-to)428-430
ISSN0036-8075
DOIs
Publication statusPublished - 2020

Cite this

Yuan, W., Zhu, B., Li, X. Y., Hansen, T. W., Ou, Y., Fang, K., Yang, H., Zhang, Z., Wagner, J. B., Gao, Y., & Wang, Y. (2020). Visualizing H2O molecules reacting at TiO2 active sites with transmission electron microscopy. Science, 367(6476), 428-430. https://doi.org/10.1126/science.aay2474