# Photogenerated charge carrier dynamics on Pt-loaded SrTiO<sub>3</sub> nanoparticles studied <i>via</i> transient-absorption spectroscopy

https://mdr.nims.go.jp/datasets/01e328ba-4cc6-4e1a-81af-7643f9b30990

## File

- [Ichihara　d4nr04725g.pdf](https://mdr.nims.go.jp/filesets/a5971506-384f-4c79-b9b6-92cdedf53351/download) ([Detail](https://mdr.nims.go.jp/filesets/a5971506-384f-4c79-b9b6-92cdedf53351.md))

## Id

01e328ba-4cc6-4e1a-81af-7643f9b30990

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-12-09T03:07:02.481489Z

## Updated at

2025-12-09T23:30:03.827197Z

## Published at

2025-12-09T23:23:45.589654Z

## Doi



## First published url

https://doi.org/10.1039/d4nr04725g

## Date published

2025-01-20

## Recorded date published

2025-1-29

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Photogenerated charge carrier dynamics on Pt-loaded SrTiO<sub>3</sub> nanoparticles
    studied <i>via</i> transient-absorption spectroscopy
  title_type: original
  lang: en

## Description

- description: Loading cocatalysts on semiconductor-based photocatalysts to create
    active reaction sites is a preferable method to enhance photocatalytic activity
    and a widely adopted strategy to achieve effective photocatalytic applications.
    Although theoretical calculations suggest that the broad density of states of
    noble metal cocatalysts, such as Pt, act as a recombination center, this has never
    been experimentally demonstrated. Herein, we employed pico-nano and nano-micro
    second transient absorption spectroscopy to investigate the often overlooked photogenerated
    holes, instead of the widely studied electrons on Pt- and Ni-loaded SrTiO3 to
    evaluate the effects of cocatalysts as a recombination center. It is demonstrated
    that Pt serves as the recombination center with no sacrificial agent; recombination
    can be suppressed by a hole scavenger, while recombination is not significant
    on Ni with localized density of states. It is also found that photo-generated
    holes in SrTiO3 tend to migrate to Pt within 400 ps, and photo-generated holes
    generated in the bulk gradually migrate to Pt cocatalysts in a micro-second regime.
  description_type: abstract
  lang: und

## Creator

- name: Fumihiko Ichihara
  role: author
  orcid: https://orcid.org/0000-0002-0274-1342
- name: Hong Pang
  role: author
  orcid: https://orcid.org/0000-0002-9286-082X
- name: Tetsuya Kako
  role: author
  orcid: https://orcid.org/0000-0002-1891-6346
- name: Detlef W. Bahnemann
  role: author
  orcid: https://orcid.org/0000-0001-6064-6653
- name: Jinhua Ye
  role: author

## Contact agent



## Publisher

organization: Royal Society of Chemistry (RSC)

## Managing organization



## Keyword

- subject: Photocatalytic H2 evolution
  schema: not_defined
- subject: Recombination center
  schema: not_defined

## Rights

- identifier: cc-by-nc-3.0

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Nanoscale
  issn: '20403364'
  volume: '17'
  issue: '5'
  start_page: 2567
  end_page: 2576

## Conference



## Related item



## Funding

- funder_name: Ministry of Education, Culture, Sports, Science and Technology, Japan
    (MEXT)
  description: World Premier International Research Center Initiative (WPI Initiative)
    on Materials Nanoarchitectonics (MANA), MEXT, Japan

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



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## Fileset

- id: a5971506-384f-4c79-b9b6-92cdedf53351
  filename: Ichihara　d4nr04725g.pdf
  content_type: application/pdf
  size: 2356669
  md5: a0378f1e1bf9c2e1efd916f6c42478d2

## Thumbnail

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filename: Ichihara　d4nr04725g.pdf