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Belenov S, Mauer D, Moguchikh E, Gavrilova A, Nevelskaya A, Beskopylny E, Pankov I, Nikulin A, Alekseenko A. New Approach to Synthesizing Cathode PtCo/C Catalysts for Low-Temperature Fuel Cells. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:856. [PMID: 38786812 PMCID: PMC11124439 DOI: 10.3390/nano14100856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 05/11/2024] [Accepted: 05/13/2024] [Indexed: 05/25/2024]
Abstract
The presented study is concerned with a new multi-step method to synthesize PtCo/C materials based on composite CoxOy/C that combines the advantages of different liquid-phase synthesis methods. Based on the results of studying the materials at each stage of synthesis with the TG, XRD, TEM, SEI, TXRF, CV and LSV methods, a detailed overview of the sequential changes in catalyst composition and structure at each stage of the synthesis is presented. The PtCo/C catalyst synthesized with the multi-step method is characterized by a uniform distribution of bimetallic nanoparticles of about 3 nm in size over the surface of the support, which result in its high ESA and ORR activity. The activity study for the synthesized PtCo/C catalyst in an MEA showed better current-voltage characteristics and a higher maximum specific power compared with an MEA based on a commercial Pt/C catalyst. Therefore, the results of the presented study demonstrate high prospects for the developed approach to the multi-step synthesis of PtM/C catalysts, which may enhance the characteristics of proton-exchange membrane fuel cells (PEMFCs).
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Affiliation(s)
- Sergey Belenov
- Faculty of Chemistry, Southern Federal University, 7 Zorge St., Rostov-on-Don 344090, Russia; (D.M.); (E.M.); (A.G.); (A.N.); (E.B.); (A.A.)
- Prometheus R&D LLC, 4G/36 Zhmaylova St., Rostov-on-Don 344091, Russia
| | - Dmitriy Mauer
- Faculty of Chemistry, Southern Federal University, 7 Zorge St., Rostov-on-Don 344090, Russia; (D.M.); (E.M.); (A.G.); (A.N.); (E.B.); (A.A.)
- Prometheus R&D LLC, 4G/36 Zhmaylova St., Rostov-on-Don 344091, Russia
| | - Elizabeth Moguchikh
- Faculty of Chemistry, Southern Federal University, 7 Zorge St., Rostov-on-Don 344090, Russia; (D.M.); (E.M.); (A.G.); (A.N.); (E.B.); (A.A.)
- Prometheus R&D LLC, 4G/36 Zhmaylova St., Rostov-on-Don 344091, Russia
| | - Anna Gavrilova
- Faculty of Chemistry, Southern Federal University, 7 Zorge St., Rostov-on-Don 344090, Russia; (D.M.); (E.M.); (A.G.); (A.N.); (E.B.); (A.A.)
| | - Alina Nevelskaya
- Faculty of Chemistry, Southern Federal University, 7 Zorge St., Rostov-on-Don 344090, Russia; (D.M.); (E.M.); (A.G.); (A.N.); (E.B.); (A.A.)
- Federal Research Center “The Southern Scientific Center of the Russian Academy of Sciences” (SSC RAS), Federal State Budgetary Institution of Science, 41 Chekhova St., Rostov-on-Don 344006, Russia;
| | - Egor Beskopylny
- Faculty of Chemistry, Southern Federal University, 7 Zorge St., Rostov-on-Don 344090, Russia; (D.M.); (E.M.); (A.G.); (A.N.); (E.B.); (A.A.)
- Prometheus R&D LLC, 4G/36 Zhmaylova St., Rostov-on-Don 344091, Russia
| | - Ilya Pankov
- Research Institute of Physical Organic Chemistry, Southern Federal University, 194/2 Stachki St., Rostov-on-Don 344090, Russia;
| | - Aleksey Nikulin
- Federal Research Center “The Southern Scientific Center of the Russian Academy of Sciences” (SSC RAS), Federal State Budgetary Institution of Science, 41 Chekhova St., Rostov-on-Don 344006, Russia;
| | - Anastasia Alekseenko
- Faculty of Chemistry, Southern Federal University, 7 Zorge St., Rostov-on-Don 344090, Russia; (D.M.); (E.M.); (A.G.); (A.N.); (E.B.); (A.A.)
- Prometheus R&D LLC, 4G/36 Zhmaylova St., Rostov-on-Don 344091, Russia
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Electrocatalysts for the Oxygen Reduction Reaction: From Bimetallic Platinum Alloys to Complex Solid Solutions. CHEMENGINEERING 2022. [DOI: 10.3390/chemengineering6010019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The oxygen reduction reaction has been the object of intensive research in an attempt to improve the sluggish kinetics that limit the performance of renewable energy storage and utilization systems. Platinum or platinum bimetallic alloys are common choices as the electrode material, but prohibitive costs hamper their use. Complex alloy materials, such as high-entropy alloys (HEAs), or more generally, multiple principal component alloys (MPCAs), have emerged as a material capable of overcoming the limitations of platinum and platinum-based materials. Theoretically, due to the large variety of active sites, this new kind of material offers the opportunity to identify experimentally the optimal binding site on the catalyst surface. This review discusses recent advances in the application of such alloys for the oxygen reduction reaction and existing experimental challenges in the benchmarking of the electrocatalytic properties of these materials.
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