Synthesis of Amorphous and Various Phase-Pure Nanoparticles of Nickel Phosphide with Uniform Sizes via a Trioctylphosphine-Mediated Pathway

被引：0

作者：

Thompson, David ^{[1
]}

Hoffman, Adam S. ^{[2
]}

Mansley, Zachary R. ^{[3
]}

York, Sarah ^{[1
]}

Wang, Feng ^{[1
]}

Zhu, Yimei ^{[4
]}

Bare, Simon R. ^{[2
]}

Chen, Jingyi ^{[1
]}

机构：

[1] Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville,AR,72701, United States

[2] Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park,CA,94025, United States

[3] Interdisciplinary Science Department, Brookhaven National Laboratory, Upton,NY,11973, United States

[4] Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton,NY,11973, United States

来源：

Inorganic Chemistry | 2024年 / 63卷 / 40期

关键词：

Nickel phosphides are of particular interest because they are highly active and stable catalysts for petroleum/biorefinery and hydrogen production. Despite their significant catalytic potential; synthesizing various phase-pure nickel phosphide nanoparticles of uniform size remains a challenge. In this work; we develop a robust trioctylphosphine (TOP)-mediated route to make highly uniform phase-pure Ni12P5; Ni2P; and Ni5P4 nanoparticles. The synthetic route forms amorphous Ni70P30 nanoparticle intermediates. The reactions can be stopped at the amorphous stage when amorphous particles are desired. The amount of P incorporation can be controlled by varying the ratio of TOP to Ni(II). The mechanism for composition control involves the competition of the kinetics of two processes: the addition of the reduced Ni and the incorporation of P into Ni. Uniform Ni70P30 amorphous nanoparticles can be generated at a high TOP-to-Ni(II) ratio; where the P incorporation kinetics is made to dominate. Ni70P30 can later be transformed into phase-pure Ni12P5; and Ni5P4 nanocrystals of uniform size. The transformation can be controlled precisely by modulating the temperature. A UV-vis study coupled with theoretical modeling reveals Ni(0)-TOPx complexes along the synthetic path. This approach may be expanded to create other metal compounds; potentially enabling the synthesis of uniform nanoparticles of a greater variety. © 2024 The Authors. Published by American Chemical Society;

D O I：

10.1021/acs.inorgchem.4c03334

中图分类号：

学科分类号：

摘要：

引用

页码：18981 / 18991

共 13 条

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