| Pt Catalysts Prepared via Top-down Electrochemical Approach: Synthesis Methodology and Support Effects |
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Alexandra Kuriganova1, Igor Leontyev2, Nikolay Leontyev3, Nina Smirnova1 |
1Platov South Russian State Polytechnic University (NPI), Novocherkassk, 346428, Russia
2Southern Federal University, Rostov-on-Don, 344090, Russia
3Azov-Black Sea Engineering Institute of Don State Agrarian University, Zernograd, 347740, Russia |
Correspondence:
Alexandra Kuriganova,
Email: kuriganova_@mail.ru
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Received: 9 February 2024 • Accepted: 23 April 2024 |
| Abstract |
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The synthesis of Pt nanoparticles and catalytically active materials using the electrochemical top-down approach involves dispersing Pt electrodes in an electrolyte solution containing alkali metal cations and support material powder using an alternating pulsed current. Platinum is dispersed to form particles with a predominant crystallographic orientation of Pt(100) and a particle size of approximately 7.6±1.0 nm. The dispersed platinum particles have an insignificant content of PtOx phase (0.25±0.03 wt.%). The average formation rate was 9.7±0.5 mg cm–2 h–1. The nature of the support (carbon material, metal oxide, carbon-metal oxide hybrid) had almost no effect on the formation rate of the Pt nanoparticles as well as their crystallographic properties. Depending on the nature of the support material, Pt-containing catalytic materials obtained by the electrochemical top-down approach showed good functional performance in fuel cell technologies (Pt/C), catalytic oxidation of CO (Pt/Al2O3) and electrochemical oxidation of methanol (Pt/TiO2-C) and ethanol (Pt/SnO2-C). |
| Key Words:
Electrochemical synthesis, Pulse electrolysis, Pt nanoparticles, Heterogenous catalysis, Electrocatalysis |
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