Memory Effect: How the Initial Structure of Nanoparticles Affects the Performance of De-Alloyed PtCu Electrocatalysts?

Angelina S. Pavlets, Anastasia A. Alekseenko (), Ilya V. Pankov, Sergey V. Belenov and Vladimir E. Guterman
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Angelina S. Pavlets: Faculty of Chemistry, Southern Federal University, 7 Zorge St., 344090 Rostov-on-Don, Russia
Anastasia A. Alekseenko: Faculty of Chemistry, Southern Federal University, 7 Zorge St., 344090 Rostov-on-Don, Russia
Ilya V. Pankov: Research Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachki St., 344090 Rostov-on-Don, Russia
Sergey V. Belenov: Faculty of Chemistry, Southern Federal University, 7 Zorge St., 344090 Rostov-on-Don, Russia
Vladimir E. Guterman: Faculty of Chemistry, Southern Federal University, 7 Zorge St., 344090 Rostov-on-Don, Russia

Energies, 2022, vol. 15, issue 24, 1-14

Abstract: An important feature of this research is the investigation of the de-alloyed catalysts based on the nanoparticles with a simple structure (alloy) and a complex structure (gradient). The resulting samples exhibit the 2–4 times higher mass activity in the ORR compared with the commercial Pt/C. The novelty of this study is due to the application of the express-electrochemical experiment to register the trend of changes in the ORR activity caused by rearranging the structure of bimetallic nanoparticles. The state-of-the-art protocol makes it possible to establish the dependence of properties of the de-alloyed catalysts on the nanoparticles’ structure obtained at the stage of the material’s synthesis. The study shows the possibility of determining the rate of the ongoing reorganization of bimetallic nanoparticles with different architectures. The PtCu/C electrocatalysts for proton-exchange membrane fuel cells presented in this work are commercially promising in terms of both the high functional characteristics and the production by facile one-pot methods.

Keywords: platinum electrocatalyst; ORR activity; de-alloyed catalyst; nanoparticle structure; electrochemical approach (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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