High-yield synthesis of PVP-stabilized small Pt clusters by microfluidic method
High-yield synthesis of PVP-stabilized small Pt clusters by microfluidic method
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DOI：
10.1016/j.cattod.2011.10.008
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发表时间：
2012-03-20
期刊：
影响因子：
5.3
通讯作者：
Tsukuda, Tatsuya
中科院分区：
文献类型：
--
作者：
Hossain, M. Jakir;Tsunoyama, Hironori;Tsukuda, Tatsuya
通过在微混合器中用 BH4- 完全还原 Pt4+ 离子，可以有效生产平均直径为 1.4 +/- 0.3 nm 的单分散 PVP 稳定的 Pt 纳米颗粒 (PtNP)。由于微流体混合，反应初期形成的PtNP对BH4-的水解受到抑制，因此PtNP的产率高于传统间歇混合的产率。包括 EXAFS、CO FTIR 和 XPS 在内的各种光谱分析结果表明，微流控合成的 PtNP 带负电荷，并且其表面具有大量边缘和顶点。 (C) 2011 Elsevier B.V. 保留所有权利。
Monodisperse PVP-stabilized Pt nanoparticles (PtNPs) with an average diameter of 1.4 +/- 0.3 nm were efficiently produced via the complete reduction of Pt4+ ions by BH4- in a micromixer. Because of microfluidic mixing, hydrolytic decomposition of BH4- by the PtNPs formed in the initial stage of the reaction was suppressed, and hence, the PtNP yield was higher than that in the conventional batch mixing. The results of various spectroscopic analyses including EXAFS, FTIR of CO and XPS revealed that the microfluidically synthesized PtNPs were negatively charged and had a high population of edges and vertices on their surface. (C) 2011 Elsevier B. V. All rights reserved.