On the dynamical nature of the active center in a single-site photocatalyst visualized by 4D ultrafast electron microscopy
Abstract
The nature of the active site in (photo) catalysis is fundamental to our understanding of the processes involved, and to their control. Four-dimensional ultrafast electron microscopy (UEM) provides a dynamic probe for catalytic active site in photocatalytic materials thanks to its unprecedented resolution both in time (femtosecond) and space (angstrom). In this contribution, we visualize the femtosecond atomic movement at the titanium active center in a single-site photocatalyst. UEM allows us to investigate the structural dynamics of the radiation sensitive specimen by measuring time-resolved diffraction intensities from different lattice planes. These findings contribute fundamental insights for developing advanced photocatalysts and suggest broad ranges of applications.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 04, 2016
- Source ID
- 10.1073/pnas.1522869113
Entities
People
- Ahmed Zewail
- Byung-Kuk Yoo
- John Meurig Thomas
- Zixue Su
Organizations
- Air Force Office of Scientific Research
- California Institute of Technology
- Gordon and Betty Moore Foundation
- National Science Foundation
- University of Cambridge