通过前体调节的多金属磷酸盐的均匀纳米颗粒:三元和四元M2P相(M=Fe,Co,Ni)

IF 4.8 Q2 NANOSCIENCE & NANOTECHNOLOGY ACS Nanoscience Au Pub Date : 2022-08-09 DOI:10.1021/acsnanoscienceau.2c00025
Tepora Su’a, Mikaylah N. Poli and Stephanie L. Brock*, 
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引用次数: 2

摘要

过渡金属磷化物(TMPs)由于其独特的磁性和催化性能,是一类备受研究的纳米材料。尽管已经建立了用于窄多分散性单金属磷化物纳米颗粒(M2P;M=Fe,Co,Ni)的稳健且可重复的合成路线,但制备多金属纳米颗粒相(M2–xM′xP;M,M′=Fe,Co,Ni)仍然是一个重大挑战。胶体合成使用零价金属羰基或多价乙酰丙酮盐前体,与三辛基膦作为磷源,油胺作为还原剂,以及其他溶剂如十八碳烯或辛基醚作为“非配位”共溶剂相结合。了解这些不同的金属前体在相同的反应环境中的行为对于评估金属前体的相对反应性在合成复杂、均匀的多金属TMP相中所起的作用至关重要。在本研究中,评估了作为温度和时间函数的磷掺入,以探讨有机金属羰基和乙酰丙酮盐前体的相对磷化速率如何影响双金属磷化物相(M2–xM′xP;M,M′=Fe,Co,Ni)的均匀形成。根据磷化研究的相对速率,我们发现,在各种金属前体与TOP的反应性显著不同的情况下,预合金化步骤对于分离所需的双金属磷化物相是必要的。然后,这些见解被转化为建立新的三金属Fe2–x–yNixCoyP相形成的简化合成方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Homogeneous Nanoparticles of Multimetallic Phosphides via Precursor Tuning: Ternary and Quaternary M2P Phases (M = Fe, Co, Ni)

Transition metal phosphides (TMPs) are a highly investigated class of nanomaterials due to their unique magnetic and catalytic properties. Although robust and reproducible synthetic routes to narrow polydispersity monometallic phosphide nanoparticles (M2P; M = Fe, Co, Ni) have been established, the preparation of multimetallic nanoparticle phases (M2–xM′xP; M, M′ = Fe, Co, Ni) remains a significant challenge. Colloidal syntheses employ zero-valent metal carbonyl or multivalent acetylacetonate salt precursors in combination with trioctylphosphine as the source of phosphorus, oleylamine as the reducing agent, and additional solvents such as octadecene or octyl ether as “noncoordinating” cosolvents. Understanding how these different metal precursors behave in identical reaction environments is critical to assessing the role the relative reactivity of the metal precursor plays in synthesizing complex, homogeneous multimetallic TMP phases. In this study, phosphorus incorporation as a function of temperature and time was evaluated to probe how the relative rate of phosphidation of organometallic carbonyl and acetylacetonate salt precursors influences the homogeneous formation of bimetallic phosphide phases (M2–xM′xP; M, M′ = Fe, Co, Ni). From the relative rate of phosphidation studies, we found that where reactivity with TOP for the various metal precursors differs significantly, prealloying steps are necessary to isolate the desired bimetallic phosphide phase. These insights were then translated to establish streamlined synthetic protocols for the formation of new trimetallic Fe2–xyNixCoyP phases.

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来源期刊
ACS Nanoscience Au
ACS Nanoscience Au 材料科学、纳米科学-
CiteScore
4.20
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0.00%
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期刊介绍: ACS Nanoscience Au is an open access journal that publishes original fundamental and applied research on nanoscience and nanotechnology research at the interfaces of chemistry biology medicine materials science physics and engineering.The journal publishes short letters comprehensive articles reviews and perspectives on all aspects of nanoscience and nanotechnology:synthesis assembly characterization theory modeling and simulation of nanostructures nanomaterials and nanoscale devicesdesign fabrication and applications of organic inorganic polymer hybrid and biological nanostructuresexperimental and theoretical studies of nanoscale chemical physical and biological phenomenamethods and tools for nanoscience and nanotechnologyself- and directed-assemblyzero- one- and two-dimensional materialsnanostructures and nano-engineered devices with advanced performancenanobiotechnologynanomedicine and nanotoxicologyACS Nanoscience Au also publishes original experimental and theoretical research of an applied nature that integrates knowledge in the areas of materials engineering physics bioscience and chemistry into important applications of nanomaterials.
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