摘要 报告了立方 Laves 相 Y(Fe x Rh 1− x ) 2 ( x ⩽ 0.3) 的磁化以及 57 Fe Mossbauer 测量值。YRh 2 观察到泡利顺磁性。在高温下,对于 x ⩾ 0.1 获得居里-魏斯行为。有效矩随着 x 的增加而增加,表明周围 Rh 原子的极化是由取代的 Fe 原子引起的。在低温下,没有观察到长程磁序,但是,记录了具有磁超精细分裂的穆斯堡尔谱。磁化强度的场依赖性表明存在非相互作用的磁团簇。还观察到剩磁的场冷却效应和时间依赖性。因此,建议这些化合物具有微磁性,
Mesoporous Rh Emerging from Nanophase‐separated Rh‐Y Alloy
作者:Abdillah Sani Bin Mohd Najib、Xiaobo Peng、Ayako Hashimoto、Shusaku Shoji、Takayuki Iida、Yunxing Bai、Hideki Abe
DOI:10.1002/asia.201900542
日期:——
Mesoporous precious metals with abundant active sites and high surface area have been widely recognized as high-performance catalytic materials. However, the templated synthesis is complex and costly. Herein, we report a mesoporous rhodium (m-Rh) that can be readily synthesized from entangled nanofibres of Rh and Y2 O3 without templates. The entangled nanofibres, prepared from uniform Rh-Y alloys under