耐久性
材料科学
纳米颗粒
纳米技术
氧还原反应
纳米尺度
材料设计
溶解
化学工程
降级(电信)
燃料电池
电化学
电极
计算机科学
复合材料
工程类
电信
化学
物理化学
作者
Dong Young Chung,Ji Mun Yoo,Yung‐Eun Sung
标识
DOI:10.1002/adma.201704123
摘要
Abstract 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.
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