Hamdan Ahmad, Stafford Luc
Département de Physique, Université de Montréal, 1375 Avenue Thérèse-Lavoie-Roux, Montreal, QC H2V 0B3, Canada.
Nanomaterials (Basel). 2022 Oct 14;12(20):3603. doi: 10.3390/nano12203603.
Discharge in liquid is a promising technique to produce nanomaterials by electrode erosion. Although its feasibility was demonstrated in many conditions, the production of nanoalloys by in-liquid discharges remains a challenge. Here, we show that spark discharge in liquid cyclohexane that is in contact with conductive solution, made of a combination of Ni-nitrate and/or Fe-nitrate and/or Co-nitrate, is suitable to produce nanoalloys (<10 nm) of Ni-Fe, Ni-Co, Co-Fe, and Ni-Co-Fe. The nanoparticles are synthesized by the reduction of metal ions during discharge, and they are individually embedded in C-matrix; this latter originates from the decomposition of cyclohexane. The results open novel ways to produce a wide spectrum of nanoalloys; they are needed for many applications, such as in catalysis, plasmonic, and energy conversion.
液体放电是一种通过电极侵蚀制备纳米材料的很有前景的技术。尽管其在许多条件下的可行性已得到证明，但通过液体放电制备纳米合金仍然是一个挑战。在此，我们表明，在与由硝酸镍和/或硝酸铁和/或硝酸钴组合而成的导电溶液接触的液体环己烷中进行火花放电，适用于制备镍 - 铁、镍 - 钴、钴 - 铁和镍 - 钴 - 铁的纳米合金（<10纳米）。纳米颗粒是在放电过程中通过金属离子的还原合成的，并且它们分别嵌入碳基质中；后者源于环己烷的分解。这些结果为制备多种纳米合金开辟了新途径；它们在许多应用中是必需的，例如在催化、等离子体和能量转换方面。
