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- Title
In-situ and wavelength-dependent photocatalytic strain evolution of a single Au nanoparticle on a TiO<sub>2</sub> film.
- Authors
Park, Sung Hyun; Kim, Sukyoung; Park, Jae Whan; Kim, Seunghee; Cha, Wonsuk; Lee, Joonseok
- Abstract
Photocatalysis is a promising technique due to its capacity to efficiently harvest solar energy and its potential to address the global energy crisis. However, the structure–activity relationships of photocatalyst during wavelength-dependent photocatalytic reactions remains largely unexplored because it is difficult to measure under operating conditions. Here we show the photocatalytic strain evolution of a single Au nanoparticle (AuNP) supported on a TiO2 film by combining three-dimensional (3D) Bragg coherent X-ray diffraction imaging with an external light source. The wavelength-dependent generation of reactive oxygen species (ROS) has significant effects on the structural deformation of the AuNP, leading to its strain evolution. Density functional theory (DFT) calculations are employed to rationalize the induced strain caused by the adsorption of ROS on the AuNP surface. These observations provide insights of how the photocatalytic activity impacts on the structural deformation of AuNP, contributing to the general understanding of the atomic-level catalytic adsorption process. The wavelength-dependent structural deformations of nanoparticles during photocatalysis are poorly understood. Here, the authors present the photocatalytic strain evolution of a single Au nanoparticle using 3D Bragg coherent X-ray diffraction imaging.
- Subjects
GOLD nanoparticles; STRUCTURE-activity relationships; X-ray imaging; PHOTOCATALYSTS; REACTIVE oxygen species; HYDROGEN evolution reactions; PHOTOCATALYSIS
- Publication
Nature Communications, 2024, Vol 15, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-024-49862-1