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Summary: This study successfully prepared carbon-supported Pt-Ln (Ln: lanthanide metal) nanoparticles using a water-based impregnation synthesis route, demonstrating their high catalytic activity in the oxygen reduction reaction (ORR). Mechanistic studies showed the formation process of Pt-Ce nanoparticles and their potential as efficient catalysts for ORR.
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Summary: This research provides a study on the stability of carbon-supported intermetallic Pt-alloy electrocatalysts and determines the effects of temperature and potential window on metal dissolution. The findings contradict the commonly accepted hypothesis that Pt dissolution is not significantly affected by temperature, and highlight the critical role of temperature in governing Pt stability and metal retention in Pt-alloy electrocatalysts. Additionally, the study shows that the rate of Pt redeposition increases with temperature, providing insight into the temperature-dependent kinetics of Pt stability.
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Carlos A. . Campos-Roldan et al.
Summary: In this study, Pt-Y nanoalloys were prepared using different carbon supports by solid-state reaction, and their performance in the oxygen reduction reaction (ORR) in acidic medium was evaluated. The results showed that the nature of the carbon support influenced the crystalline phase, particle size, and nearsurface chemistry of the nanoalloy, which in turn affected its activity and stability.
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Summary: This review summarizes and discusses the latest advances on Pt-REM alloy electrocatalysts and their implementation in PEMFCs. It is of great significance for the synthesis, design, and performance goals of novel Pt-REM alloys.
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Article
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Shi-Long Xu et al.
Summary: In this study, a carbon-supported intermetallic catalyst was synthesized using an impregnation method, which increased the alloying of Pt and Ln by increasing the surface area for hydrogen spillover, resulting in the formation of a favorable hexagonal Pt(5)Ln phase. The catalyst exhibited high catalytic activity, improved power density, and durability in fuel cells.
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Summary: In this study, it was found that the Pt/Gd ratio in PtxGd/C electrocatalysts influences the crystalline structure, particle size, and electrochemical activity, with a morphological transition from solid nanoparticles to porous architecture as Gd concentration increases. Mass activity towards the ORR displays a volcano-shaped trend, peaking at Pt4.7Gd. This research identifies key properties of PtxGd/C nanostructures essential for enhancing ORR activity and durability while also addressing the issue of undesirable porous architecture formation.
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