Composition-Defined Bimetallic Mo-Pt Sub-Nanosized Particles
Composition-Defined Bimetallic Mo-Pt Sub-Nanosized Particles
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DOI：
10.1002/ejic.202000055
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发表时间：
2020-05
影响因子：
2.3
通讯作者：
Masanori Wakizaka;H. Muramatsu;T. Imaoka;Kimihisa Yamamoto
中科院分区：
文献类型：
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作者：
Masanori Wakizaka;H. Muramatsu;T. Imaoka;Kimihisa Yamamoto
本报告描述了生成组成限定的纳米Mo-Pt亚纳米级颗粒的第一个实例。为了控制Mo和Pt的摩尔比，使用苯基甲亚胺树枝状聚合物作为分子模板进行UV/维斯滴定实验。在将组装体负载到碳载体上之后，在H2气氛下还原煅烧，得到负载在碳上的亚纳米尺寸颗粒的样品（Mo 4Pt 8和Mo 4Pt 24）。通过扫描透射电子显微镜和能量色散X射线光谱仪确认了亚纳米尺寸的Mo-Pt颗粒，并分别显示了尺寸分布（Mo 4Pt 8：0.9 ± 0.2 nm; Mo 4Pt 24：1.0 ± 0.2 nm）和Mo/Pt摩尔比（Mo 4Pt 8：1/1.8 ± 0.2，Mo 4Pt 24：1/5.2 ± 0.4）。此外，表明Mo和Pt之间的相互作用导致Mo-Pt亚纳米级颗粒的热稳定性增加。
This report describes the first example of the generation of composition‐defined bimetallic Mo‐Pt sub‐nanosized particles. UV/Vis titration experiments were carried out in order to control the mole ratio of Mo and Pt using a phenylazomethine dendrimer as a molecular template. After supporting the assemblies onto the carbon support, reductive calcination under an atmosphere of H2afforded the samples of sub‐nanosized particles supported on the carbon (Mo4Pt8andMo4Pt24). The Mo‐Pt particles with sub nano‐size were confirmed by scanning transmission electron microscopy with energy‐dispersive X‐ray spectrometry, and the size distribution (Mo4Pt8: 0.9 ± 0.2 nm;Mo4Pt24: 1.0 ± 0.2 nm) and the Mo/Pt mole ratio (Mo4Pt8: 1/1.8 ± 0.2,Mo4Pt24: 1/5.2 ± 0.4) were revealed, respectively. Moreover, it was suggested that the interactions between Mo and Pt lead increase of a thermal stability of the Mo‐Pt sub‐nanosized particles.