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The oxygen reduction reaction on Pt: Why particle size and interparticle distance matter

DOI: 10.1021/acscatal.1c00652 DOI Help

Authors: Masanori Inaba (University of Bern; University of Copenhagen) , Alessandro Zana (University of Bern) , Jonathan Quinson (University of Copenhagen) , Francesco Bizzotto (University of Bern) , Carsten Dosche (Carl von Ossietzky University of Oldenburg) , Alexandra Dworzak (Carl von Ossietzky University of Oldenburg; echnische Universität Braunschweig) , Mehtap Oezaslan (Carl von Ossietzky University of Oldenburg; Technische Universität Braunschweig) , Søren Bredmose Simonsen (University of Denmark) , Luise Theil Kuhn (echnical University of Denmark) , Matthias Arenz (University of Bern)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Acs Catalysis

State: Published (Approved)
Published: June 2021
Diamond Proposal Number(s): 12746

Abstract: Carbon-supported Pt-based nanoparticles are important electrocatalysts for energy conversion reactions such as the oxygen reduction reaction (ORR). Although this reaction has been extensively studied, the influence of factors such as the particle size and interparticle distance of the nanoparticle-based or nanosized electrocatalysts on the ORR activity and durability are not yet fully understood and often intertwined. This lack of understanding is mostly based on the limitation in the synthetic approaches of the electrocatalysts, which usually do not allow an independent variation of the particle size and interparticle distance. In the presented work, we succeeded to disentangle both factors using a “colloidal toolbox” approach and have demonstrated an effect of the interparticle distance on the electronic properties of the nanoparticle via operando electrochemical X-ray absorption spectroscopy (XAS).

Journal Keywords: platinum; oxygen reduction reaction (ORR); particle size effect; interparticle distance; operando electrochemical X-ray absorption spectroscopy (XAS)

Subject Areas: Chemistry, Energy

Instruments: B18-Core EXAFS

Other Facilities: SuperXAS at SLS

Added On: 07/06/2021 09:00

Discipline Tags:

Energy Storage Earth Sciences & Environment Sustainable Energy Systems Energy Climate Change Physical Chemistry Catalysis Chemistry Nanoscience/Nanotechnology

Technical Tags:

Spectroscopy X-ray Absorption Spectroscopy (XAS)