Stability of platinum nanoparticles supported on surface-treated carbon black
Stability of platinum nanoparticles supported on surface-treated carbon black
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DOI：
10.1016/j.apcatb.2016.02.049
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发表时间：
2016-07-15
影响因子：
22.1
通讯作者：
Motosuke, Masahiro
中科院分区：
文献类型：
--
作者：
Kameya, Yuki;Hayashi, Takuhiro;Motosuke, Masahiro
铂纳米粒子负载在炭黑（CB）上用作聚合物电解质燃料电池的电催化剂，其稳定性对催化剂体系的耐久性至关重要。在这里，我们研究了Pt纳米粒子的稳定性，支持在表面处理的CB与热化学开发的表面纳米结构。经表面处理的CB的突出结构能够支撑通过四氢硼酸钠（NaBH 4）还原六水合六氯铂（IV）酸（H2PtCl 6中心点6H（2）O）与聚乙烯吡咯烷酮（PVP）合成的Pt纳米颗粒。在加热至800 ℃的过程中，使用原位透射电子显微镜观察检查了Pt稳定性对CB表面上的沉积位置的依赖性。我们发现，CB表面上的突出部分的功能作为本地网站的稳定支持铂纳米粒子。因此，我们建议使用CB表面纳米结构可以提高Pt纳米颗粒的稳定性。(C)© 2016 Elsevier B.V.版权所有。
Platinum nanoparticles supported on carbon black (CB) are used as electrocatalysts in polymer electrolyte fuel cells, and their stability is important for the durability of the catalyst system. Here, we investigated the stability of Pt nanoparticles supported on surface-treated CB with a thermochemically developed surface nanostructure. The protruding structure of surface-treated CB was able to support Pt nanoparticles synthesized via the sodium tetrahydroborate (NaBH4) reduction of hexachloroplatinic(IV) acid hexahydrate (H2PtCl6 center dot 6H(2)O) with polyvinylpyrrolidone (PVP). The dependence of Pt stability on the deposition locations on the CB surface was examined using in situ transmission electron microscope observations during heating up to 800 degrees C. We found that the protruding parts on the CB surface function as local sites for stably supporting Pt nanoparticles. Hence, we suggest that the stability of the Pt nanoparticles can be improved using the CB surface nanostructure. (C) 2016 Elsevier B.V. All rights reserved.