Influence of Nanoparticle Seeds on the Formation and Growth of High Entropy Alloys during Core@Shell Nanoparticle Synthesis

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Фев. 26, 2025

The growth of inorganic shells on nanocrystal seeds to form core@shell nanoparticles is well-known enhance and improve properties performance, therefore foundational many applications. High entropy alloys, which contain five or more metals in near-equal amounts, are emerging as important materials due their synergistic properties. Integrating high alloys into the has potential combine expand benefits both. However, compositional complexity complicates shell because competing reactions byproducts that possible. Here, we report a synthetic protocol for growing alloy metal nanoparticle seeds, along with mechanistic insights from time-point studies define guidelines controlling composition, thickness, modes. By studying NiPdPtRhIr, SnPdPtRhIr, SnNiPdPtIr Au NiFePdRhIr both Pt find seed modifies reaction pathways accelerates formation compared when they synthesized directly absence seed. We also identify produce freestanding multimetallic particles instead desired shells, well evidence galvanic exchange ripening processes contribute growth. Based these insights, compiled roadmap design rules was then applied synthesis additional including SnNiFeRhIr SnNiFeCoPd, tolerance relative what can be achieved through direct synthesis.

Язык: Английский

High entropy nanomaterials for zero-emission energy systems: advanced structural design, catalytic performance and functional mechanisms

Journal of Energy Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

Язык: Английский