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Intermediates during the nucleation of platinum nanoparticles by a reaction with ethylene glycol: operando X-ray absorption spectroscopy studies with a microfluidic cell

DOI: 10.1021/acs.jpcc.2c08749 DOI Help

Authors: Sylvia Britto (Diamond Light Source) , Christopher M. A. Parlett (Diamond Light Source; The University of Manchester; UK Catalysis Hub, Research Complex at Harwell) , Stuart Bartlett (Diamond Light Source) , Joshua D. Elliott (Diamond Light Source) , Konstantin Ignatyev (Diamond Light Source) , Sven L. M. Schroeder (Diamond Light Source; University of Leeds; ESPRC Future Continuous Manufacturing and Advanced Crystallisation (CMAC) Hub, Research Complex at Harwell)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: The Journal Of Physical Chemistry C , VOL 38

State: Published (Approved)
Published: May 2023
Diamond Proposal Number(s): 21484

Open Access Open Access

Abstract: Using operando X-ray absorption spectroscopy in a continuous-flow microfluidic cell, we have investigated the nucleation of platinum nanoparticles from aqueous hexachloroplatinate solution in the presence of the reducing agent ethylene glycol. By adjusting flow rates in the microfluidic channel, we resolved the temporal evolution of the reaction system in the first few seconds, generating the time profiles for speciation, ligand exchange, and reduction of Pt. Detailed analysis of the X-ray absorption near-edge structure and extended X-ray absorption fine structure spectra with multivariate data analysis shows that at least two reaction intermediates are involved in the transformation of the precursor H2PtCl6 to metallic platinum nanoparticles, including the formation of clusters with Pt–Pt bonding before complete reduction to Pt nanoparticles.

Subject Areas: Materials, Chemistry

Instruments: I18-Microfocus Spectroscopy

Added On: 03/05/2023 09:38


Discipline Tags:

Physical Chemistry Catalysis Chemistry Materials Science Chemical Engineering Engineering & Technology Nanoscience/Nanotechnology

Technical Tags:

Spectroscopy X-ray Absorption Spectroscopy (XAS)