Synthesis and electrocatalytic oxygen reduction properties of truncated octahedral Pt3Ni nanoparticles
Synthesis and electrocatalytic oxygen reduction properties of truncated octahedral Pt3Ni nanoparticles
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DOI：
10.1007/s12274-010-0049-x
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发表时间：
2011
期刊：
影响因子：
9.9
通讯作者：
Jianbo Wu;Hong Yang
中科院分区：
文献类型：
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作者：
Jianbo Wu;Hong Yang
采用形貌控制合成法制备了Pt 3 Ni纳米粒子，并将其用作质子交换膜燃料电池（PEMFC）的氧还原电催化剂。系统地研究了封端剂、还原剂的种类、反应时间等合成参数对反应的影响。对制备的Pt 3 Ni纳米颗粒进行基于丁胺的表面处理，以制备碳载电催化剂。在0.9 V碱性电解液中，Pt 3 Ni电催化剂的面积比活性为0.76 mA/cm 2（Pt），是商业Pt/C催化剂（0.17 mA/cm 2（Pt））的4.5倍。在0.9V下，质量活性达到0.30A/mg（Pt），约为商业Pt/C催化剂的2倍。我们的研究结果还表明，这些碳载Pt 3 Ni电催化剂的面积比活性强烈依赖于（111）表面分数，这是一致的研究结果的基础上Pt 3 Ni扩展单晶表面。
Pt3Ni nanoparticles have been obtained by shape-controlled synthesis and employed as oxygen reduction electrocatalysts for proton exchange membrane fuel cells (PEMFC). The effects of varying the synthesis parameters such as the types of the capping agent and the reducing agent, and the reaction time have been systematically studied. The as-prepared Pt3Ni nanoparticles were subjected to a butylamine-based surface treatment in order to prepare carbon-supported electrocatalysts. The Pt3Ni electrocatalysts show an areaspecific activity of 0.76 mA/cm2(Pt) at 0.9 V in an alkaline electrolyte, which is 4.5 times that of a commercial Pt/C catalyst (0.17 mA/cm2(Pt)). The mass activity reached 0.30 A/mg(Pt) at 0.9 V, which is about twice that of the commercial Pt/C catalyst. Our results also show that the area-specific activities of these carbon-supported Pt3Ni electrocatalysts depend strongly on the (111) surface fraction, which is consistent with the results of a study based on Pt3Ni extended single-crystal surfaces.