Highly Durable and Active Pt‐Based Nanoscale Design for Fuel‐Cell Oxygen‐Reduction Electrocatalysts,Advanced Materials

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Highly Durable and Active Pt‐Based Nanoscale Design for Fuel‐Cell Oxygen‐Reduction Electrocatalysts
Advanced Materials ( IF 27.4 ) Pub Date : 2018-01-23 , DOI: 10.1002/adma.201704123
Dong Young Chung _{1,

2} , Ji Mun Yoo _{1,

2} , Yung-Eun Sung _{1,

2}

Affiliation

Fuel cells are one of the promising energy‐conversion devices due to their high efficiency and zero emission. Although recent advances in electrocatalysts have been achieved using various material designs such as alloys, core@shell structures, and shape control, many issues still remain to be resolved. Especially, material design issues for high durability and high activity are recently accentuated owing to severe instability of nanoparticles under fuel‐cell operating conditions. To address these issues, fundamental understanding of functional links between activity and durability is timely urgent. Here, the activity and durability of nanoscale materials are summarized, focusing on the nanoparticle size effect. In addition to phenomenological observation, two major degradation origins, including atomic dissolution and particle size increase, are discussed related to the activity decrease. Based on the fundamental understanding of nanoparticle degradation, recent promising strategies for durable Pt‐based nanoscale electrocatalysts are introduced and the role of each design for durability enhancement is discussed. Finally, short comments related to the future direction of nanoparticle issues are provided in terms of nanoparticle synthesis and analysis.

中文翻译：

燃料电池减氧电催化剂的高度耐用且基于活性铂的纳米级设计

燃料电池由于其高效率和零排放而成为有前途的能量转换设备之一。尽管使用各种材料设计（例如合金，核壳结构和形状控制）在电催化剂方面取得了最新进展，但仍有许多问题有待解决。特别是，由于纳米颗粒在燃料电池工作条件下的严重不稳定性，近来突出了高耐用性和高活性的材料设计问题。为了解决这些问题，迫切需要对活动与持久性之间的功能联系进行基本了解。在此，对纳米级材料的活性和耐久性进行了总结，重点是纳米颗粒尺寸效应。除了现象学观察，还有两个主要的降解起源，包括原子溶解和粒径增加，与活动减少有关的讨论。基于对纳米粒子降解的基本理解，介绍了耐用的基于Pt的纳米级电催化剂的最新有希望的策略，并讨论了每种设计对增强耐用性的作用。最后，就纳米颗粒的合成和分析提供了与纳米颗粒问题的未来方向相关的简短评论。

更新日期：2018-01-23

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