Catalysis in Extreme Field Environments: The Case of Strongly Ionized $SiO_{2}$ Nanoparticle Surfaces
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866909230505656320 |
|---|---|
| author | Linker, Thomas M. Dagar, Ritika Feinberg, Alexandra Sahel-Schackis, Samuel Nomura, Ken-ichi Nakano, Aiichiro Shimojo, Fuyuki Vashishta, Priya Bergmann, Uwe Kling, Matthias F. Summers, Adam M. |
| author_facet | Linker, Thomas M. Dagar, Ritika Feinberg, Alexandra Sahel-Schackis, Samuel Nomura, Ken-ichi Nakano, Aiichiro Shimojo, Fuyuki Vashishta, Priya Bergmann, Uwe Kling, Matthias F. Summers, Adam M. |
| contents | High electric fields can significantly alter catalytic environments and the resultant chemical processes. Such fields arise naturally in biological systems but can also be artificially induced through localized excitations at nanoscale. Recently, strong field excitation of dielectric nanoparticles has emerged as an avenue for studying catalysis in highly ionized environments producing extreme electric fields. While the dynamics of surface ion emission driven by ultrafast laser ionization has been heavily explored, understanding the molecular dynamics leading to fragmentation has remained elusive. To address this, we employed a multiscale approach utilizing non-adiabatic quantum molecular dynamics (NAQMD) simulations on hydrogenated silica surfaces in both bare and wetted environments under field conditions mimicking those of an ionized nanoparticle. Our findings indicate that hole localization drives fragmentation dynamics, leading to surface silanol dissociation within 50 fs and charge transfer-induced water splitting in wetted environments within 150 fs. Further insight into such ultrafast mechanisms is critical for advancement of catalysis on the surface of charged nanosystems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_15602 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Catalysis in Extreme Field Environments: The Case of Strongly Ionized $SiO_{2}$ Nanoparticle Surfaces Linker, Thomas M. Dagar, Ritika Feinberg, Alexandra Sahel-Schackis, Samuel Nomura, Ken-ichi Nakano, Aiichiro Shimojo, Fuyuki Vashishta, Priya Bergmann, Uwe Kling, Matthias F. Summers, Adam M. Chemical Physics Computational Physics High electric fields can significantly alter catalytic environments and the resultant chemical processes. Such fields arise naturally in biological systems but can also be artificially induced through localized excitations at nanoscale. Recently, strong field excitation of dielectric nanoparticles has emerged as an avenue for studying catalysis in highly ionized environments producing extreme electric fields. While the dynamics of surface ion emission driven by ultrafast laser ionization has been heavily explored, understanding the molecular dynamics leading to fragmentation has remained elusive. To address this, we employed a multiscale approach utilizing non-adiabatic quantum molecular dynamics (NAQMD) simulations on hydrogenated silica surfaces in both bare and wetted environments under field conditions mimicking those of an ionized nanoparticle. Our findings indicate that hole localization drives fragmentation dynamics, leading to surface silanol dissociation within 50 fs and charge transfer-induced water splitting in wetted environments within 150 fs. Further insight into such ultrafast mechanisms is critical for advancement of catalysis on the surface of charged nanosystems. |
| title | Catalysis in Extreme Field Environments: The Case of Strongly Ionized $SiO_{2}$ Nanoparticle Surfaces |
| topic | Chemical Physics Computational Physics |
| url | https://arxiv.org/abs/2406.15602 |