High-temperature synthesis of PtCo/C catalysts: The effect of Pt loading on their structure and activity

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-10-01 DOI:10.1016/j.mseb.2025.118844

A.K. Nevelskaya , S.V. Belenov , A.A. Gavrilova , N.V. Lyanguzov , E.R. Beskopylny , I.V. Pankov , A.A. Kokhanov

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Abstract

This study presents a high-performance PtCo/C catalyst synthesized from commercial Pt/C (10–40 wt% Pt) via high-temperature treatment (700 °C, H₂/inert atmosphere) of cobalt-deposited precursors. Increasing platinum content was found to promote nanoparticle coalescence, reducing the electrochemically active surface area (ECSA) and diminishing catalytic activity. Among the tested variants, the 20 wt% Pt-loaded PtCo/C catalyst demonstrated exceptional performance, achieving 4.7-fold higher activity than commercial Pt/C benchmarks. Accelerated stability tests (AST) revealed superior durability, with the PtCo/C-20 catalyst exhibiting higher post-AST activity, lower ECSA degradation, and minimal half-wave potential loss. When integrated into membrane electrode assemblies (MEAs), the catalyst showed enhanced functional performance, confirming its potential for low-temperature fuel cell applications.

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PtCo/C催化剂的高温合成：Pt负载对其结构和活性的影响

本研究提出了一种高性能的PtCo/C催化剂，由商用Pt/C （10-40 wt% Pt）通过钴沉积前驱体的高温处理（700°C， H₂/惰性气氛）合成。增加铂含量会促进纳米颗粒聚结，降低电化学活性表面积（ECSA），降低催化活性。在测试的变体中，20 wt% Pt负载PtCo/C催化剂表现出优异的性能，其活性比商用Pt/C基准高4.7倍。加速稳定性测试（AST）显示，PtCo/C-20催化剂在AST后表现出更高的活性、更低的ECSA降解和最小的半波潜在损失。当将催化剂集成到膜电极组件（MEAs）中时，该催化剂显示出增强的功能性能，证实了其在低温燃料电池中的应用潜力。

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来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.