Facile synthesis of Pt-decorated Ir black as a bifunctional oxygen catalyst for oxygen reduction and evolution reactions
Facile synthesis of Pt-decorated Ir black as a bifunctional oxygen catalyst for oxygen reduction and evolution reactions
复制标题
轻松合成 Pt 修饰的铱黑作为氧还原和析出反应的双功能氧催化剂
DOI：
10.1039/c9nr00279k
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发表时间：
2019
期刊：
影响因子：
6.7
通讯作者：
Yi Baolian
中科院分区：
文献类型：
--
作者：
Fang Dahui;Tang Xuejun;Yang Limeng;Xu Dongyan;Zhang Hongjie;Sun Shucheng;Shao Zhigang;Yi Baolian
在Ir黑的辅助下，用简便的方法在水中制备了两种不同Pt质量分数（Pt4@Ir96和Pt16@Ir84）的Pt修饰Ir黑（Pt@Ir）纳米粒子。研究了Pt@Ir纳米颗粒在酸性介质中作为氧还原反应（ORR）和析氧反应（OER）的双功能氧催化剂。得益于超细Pt纳米点在Ir黑表面的良好分散以及Pt与底层Ir原子之间的协同效应，Pt@Ir纳米粒子具有出色的ORR活性和与商业Ir黑相当的OER性能。特别是Pt16@Ir84的ORR质量活度是商品Pt黑的2.6倍，比Ir/Pt质量比为50/50 （Pt50Ir50）的Pt黑和Ir黑的混合物具有更好的双功能性能。我们的工作强调了用Pt纳米点修饰Ir黑以制备双功能氧催化剂的有效性。
Pt-Decorated Ir black (Pt@Ir) nanoparticles with two varying Pt mass fractions (Pt4@Ir96 and Pt16@Ir84) were generated by a facile method in water with the aid of Ir black. The Pt@Ir nanoparticles were investigated as a bifunctional oxygen catalysts for both the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in acidic medium. Benefiting from the good dispersion of ultrafine Pt nanodots on the Ir black surface and the synergistic effect between the Pt and underlying Ir atoms, Pt@Ir nanoparticles have exhibited outstanding ORR activity and comparable OER performance in comparison with commercial Ir black. In particular, Pt16@Ir84 shows an ORR mass activity of 2.6 times that of commercial Pt black and exhibits much better bifunctional performances than a mixture of Pt black and Ir black with a Ir/Pt mass ratio of 50/50 (Pt50Ir50). Our work highlights the effectiveness of decorating Ir black with Pt nanodots to fabricate bifunctional oxygen catalysts.