Preparation and Oxygen Sensitivity of a Range of Noble-Metal Nanoparticles (Ir, Pt, and Au) Protected by a Series of Chalcogen–Dodecane Ligands (S, Se, and Te)
Preparation and Oxygen Sensitivity of a Range of Noble-Metal Nanoparticles (Ir, Pt, and Au) Protected by a Series of Chalcogen–Dodecane Ligands (S, Se, and Te)
复制标题
受一系列硫属元素-十二烷配体（S、Se 和 Te）保护的一系列贵金属纳米颗粒（Ir、Pt 和 Au）的制备和氧敏感性
DOI：
10.1021/acs.chemmater.0c00406
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发表时间：
2021
影响因子：
8.6
通讯作者：
Lear, Benjamin J.
中科院分区：
文献类型：
--
作者：
Tanygin, Vadim;Lear, Benjamin J.
铱，铂，和金纳米粒子，用硫，硒，或碲十二烷配体保护，在实验室环境条件下合成。这九个纳米粒子的特征在于热重分析，透射电子显微镜，和X射线光电子能谱（XPS）。XPS用于测定在合成时和在环境实验室条件下老化1周后金属-硫族元素界面处存在的氧化程度。在合成时，发现涉及硫原子的界面没有氧化程度，并且在1周的过程中保持这种氧化的缺乏。与此相反，发现所有涉及碲的界面在合成时都具有一定程度的氧化（对于Ir、Pt和Au颗粒分别为28、77和76%），并且对于Ir、Pt和Au，该氧化程度在1周的过程中分别增加到38、83和92%。对于涉及硒的界面，所有界面最初没有任何氧化，发现铱和铂界面在1周内是稳定的。另一方面，金界面随时间氧化，在环境实验室条件下1周后达到60%氧化。因此，我们的工作表明，IrS，IrSe，PtS，PtSe和AuS提供的金属配体界面是稳定的，相对于在环境条件下的氧化。
Iridium, platinum, and gold nanoparticles, protected with sulfur, selenium, or tellurium dodecane ligands, were synthesized under ambient laboratory conditions. These nine nanoparticles were characterized by thermogravimetric analysis, transmission electron microscopy, and X-ray photoelectron spectroscopy (XPS). XPS was used to determine the degree of oxidation present at the metal–chalcogen interface at the time of synthesis and after 1 week of aging under ambient laboratory conditions. Upon synthesis, interfaces involving sulfur atoms were found to have no degree of oxidation and to retain this lack of oxidation over the course of 1 week. In contrast, all interfaces involving tellurium were found to have some degree of oxidation (28, 77, and 76% for Ir, Pt, and Au particles, respectively) at the time of synthesis, and this degree of oxidation increased over the course of 1 week to 38, 83, and 92% for Ir, Pt, and Au, respectively. For interfaces involving selenium, all interfaces initially lacked any oxidation and the iridium and platinum interface was found to be stable over 1 week. On the other hand, the gold interface oxidized over time, reaching 60% oxidation after 1 week under ambient laboratory conditions. Thus, our work shows that IrS, IrSe, PtS, PtSe, and AuS provide metal–ligand interfaces that are stable, with respect to oxidation under ambient conditions.