Nitride Stabilized PtNi Core-Shell Nanocatalyst for high Oxygen Reduction Activity
Nitride Stabilized PtNi Core-Shell Nanocatalyst for high Oxygen Reduction Activity
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DOI：
10.1021/nl303362s
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发表时间：
2012-12-01
期刊：
影响因子：
10.8
通讯作者：
Adzic, Radoslav R.
中科院分区：
文献类型：
--
作者：
Kuttiyiel, Kurian A.;Sasaki, Kotaro;Adzic, Radoslav R.
我们介绍了一条开发新型PtNiN核壳催化剂的路线，该催化剂具有低铂含量壳和廉价的镍核，对氧还原反应(ORR)具有高活性和稳定性。PtNiN的合成包括对镍纳米颗粒进行氮化，同时将其包裹在2-4个单层厚度的铂壳中。实验数据和密度泛函理论计算表明，氮化物具有促进核壳结构形成的双功能效应，并通过诱导几何效应和电子效应改善了铂壳的性能。廉价NiN核的合成为设计各种过渡金属氮化物核壳纳米粒子提供了可能性，使其在能量转换过程中有广泛的应用。
We describe a route to the development of novel PtNiN core shell catalysts with low Pt content shell and inexpensive NiN core having high activity and stability for the oxygen reduction reaction (ORR). The PtNiN synthesis involves nitriding Ni nanoparticles and simultaneously encapsulating it by 2-4 monolayer-thick Pt shell. The experimental data and the density functional theory calculations indicate nitride has the bifunctional effect that facilitates formation of the core shell structures and improves the performance of the Pt shell by inducing both geometric and electronic effects. Synthesis of inexpensive NiN cores opens up possibilities for designing of various transition metal nitride based core shell nanoparticles for a wide range of applications in energy conversion processes.