• help
  • PC | SP
  • JP | EN
          
Refine your search：     
Report No.
 - 
Clear All
Return to the previous page

Dispersive XAFS Study on the Laser-Induced Reduction of a Rh$$^{3+}$$ ion complex; Presence of a Rh$$^{+}$$ Intermediate in Direct Photoreduction

Saeki, Morihisa*; Matsumura, Daiju   ; Nakanishi, Ryuzo*; Yomogida, Takumi   ; Tsuji, Takuya  ; Saito, Hiroyuki*; Oba, Hironori* 

The reaction mechanism of the direct photoreduction of a Rh$$^{3+}$$ ion complex to a Rh$$^{0}$$ species induced by pulsed ultraviolet laser irradiation was studied using dispersive X-ray absorption fine structure (DXAFS) spectroscopy. The time-resolved X-ray absorption near edge structure (XANES) showed the absence of isosbestic points and suggested that more than two Rh$$^{n+}$$ species contribute toward the direct photoreduction of Rh$$^{3+}$$. Analysis of the time-resolved XANES data by singular value deposition showed that the direct photoreduction involves three Rh$$^{n+}$$ species. Multivariate curve resolution by alternating least-squares analysis (MCR-ALS) of the time-resolved XANES data gave pure spectra and concentration profiles of the three Rh$$^{n+}$$ species. The Rh$$^{n+}$$ species were assigned to Rh$$^{3+}$$, Rh$$^{+}$$, and Rh$$^{0}$$ species based on the features of the pure XANES spectra. The concentration profiles suggested that the direct photoreduction proceeds in the order of Rh$$^{3+}$$ $$rightarrow$$ Rh$$^{+}$$ $$rightarrow$$ Rh$$^{0}$$. A reaction mechanism, which was proposed involving photoreductions of Rh$$^{3+}$$ and Rh$$^{+}$$, photoinduced autocatalytic reductions of Rh$$^{3+}$$ and Rh$$^{+}$$, and photooxidation of Rh$$^{+}$$, well reproduced the concentration profiles of three Rh$$^{n+}$$ species.

Language

 :

English

Journal

 :

Journal of Physical Chemistry C

Volume

 :

126

Number

 :

12

Pages

 :

p.5607 - 5616

Publication Year/Month

 :

2022/03

Meeting title

 :

Held date

 :

Location (city)

 :

Location (country)

 :

Patent information

 :

PDF

 :


Paper URL

 :

https://doi.org/10.1021/acs.jpcc.1c10160

Read or search this article

DOI for research data

 :

Keywords

 :

ロジウム; レーザー誘起微粒子化; DXAFS; MCR-ALS

Research Facility

 :

Press Release

 :

Article of JAEA R&D Review

 :

Cooperating Institute

 :

Accesses

 :

- Accesses

InCites™

 :

Percentile:52.5

Category:Chemistry, Physical

Altmetrics

 :

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.

Return to the previous page