Pt-Based Core-Shell Catalyst Architectures for Oxygen Fuel Cell Electrodes
Pt-Based Core-Shell Catalyst Architectures for Oxygen Fuel Cell Electrodes
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DOI：
10.1021/jz4014135
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发表时间：
2013-10-03
影响因子：
5.7
通讯作者：
Strasser, Peter
中科院分区：
文献类型：
--
作者：
Oezaslan, Mehtap;Hasche, Frederic;Strasser, Peter
铂基核-壳纳米粒子已成为一种有前途的一代高活性电催化剂，以加速燃料电池系统中的氧还原反应（ORR）的缓慢动力学。它们的电子和结构性质可以通过修改Pt壳厚度、核组成、直径和形状来容易地定制;这导致比最先进的纯Pt催化剂的活性和耐久性显著改善。通过高效和稳健的ORR催化剂用于电化学能量转换的相关性，该观点回顾了在探索核壳纳米颗粒的结构和组成方面的几个概念和选定的最新进展。解决当前的成就和挑战，在制备以及微观和光谱表征的核壳纳米催化剂，我们的理解提供了一个简明的帐户上的表面和亚表面结构的多金属核壳纳米粒子如何影响其反应性。最后，对核壳催化剂在聚合物交换膜燃料电池中的大规模应用前景进行了讨论
Pt-based core-shell nanoparticles have emerged as a promising generation of highly active electrocatalysts to accelerate the sluggish kinetics of oxygen reduction reaction (ORR) in fuel cell systems. Their electronic and structural properties can be easily tailored by modifying the Pt shell thickness, core composition, diameter, and shape; this results in significant improvements of activity and durability over state-of-the-art pure Pt catalysts. Prompted by the relevance of efficient and robust ORR catalysts for electrochemical energy conversion, this Perspective reviews several concepts and selected recent developments in the exploration of the structure and composition of core-shell nanoparticles. Addressing current achievements and challenges in the preparation as well as microscopic and spectroscopic characterization of core-shell nanocatalysts, a concise account of our understanding is provided on how the surface and subsurface structure of multimetallic core-shell nanoparticles affect their reactivity. Finally, perspectives for the large-scale implementation of core-shell catalysts in polymer exchange membrane fuel cells are discussed