Design principles for the synthesis of platinum–cobalt intermetallic nanoparticles for electrocatalytic applications
Design principles for the synthesis of platinum–cobalt intermetallic nanoparticles for electrocatalytic applications
复制标题
用于电催化应用的铂钴金属间纳米粒子的合成设计原理
DOI：
10.1039/d3cc00590a
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发表时间：
2023
影响因子：
4.9
通讯作者：
Yang, Hong
中科院分区：
文献类型：
--
作者：
Yu, Siying;Yang, Hong
近年来，随着聚合物电解质膜燃料电池（PEMFC）的发展速度加快，制备活性和耐用的电催化剂已成为日益重要的技术挑战。铂钴（Pt-Co）合金电催化剂已被商业应用于氢动力燃料电池汽车，其金属间化合物形式承诺更好的耐久性，这对于满足重型汽车和其他运输选择的8000 h寿命目标至关重要。在这篇专题文章中，我们首先介绍了Pt-Co金属间化合物的原子有序结构，然后讨论了制造具有所需结构属性的PtCo基金属间化合物纳米颗粒的热力学和动力学驱动力，然后通过最近的例子来说明如何更好地控制成分，尺寸和形状。讨论了Pt-Co金属间化合物纳米结构的关键结构特征与催化性能之间的关系，重点讨论了Pt-Co金属间化合物纳米结构作为氢动力PEMFC氧还原反应（ORR）电催化剂的应用。我们特别强调金属间化合物结构对于提高耐久性的重要性，并总结了它们在三电极系统和全电池研究中的电催化性能的表征。最后，我们提供了我们的观点的设计，合成，表征和性能研究的Pt-Co金属间化合物纳米粒子作为ORR电催化剂。这篇文章应该提供一个新的理解设计的ORR电催化应用使用这类金属间化合物。
As the development of polymer electrolyte membrane fuel cells (PEMFCs) has sped up in recent years, producing active and durable electrocatalysts has become an increasingly important technical challenge. Platinum–cobalt (Pt–Co) alloy electrocatalyst has been commercially applied to hydrogen-powered fuel cell vehicles, and their intermetallic forms promise better durability, which is crucial to satisfy the 8000 h lifetime target of heavy-duty vehicles and other transportation options. In this feature article, we first present the atomically ordered structures of Pt–Co intermetallic, then discuss the thermodynamic and kinetic driving forces for making the PtCo-based intermetallic nanoparticles with desired structural attributes, followed by recent examples to illustrate how to achieve better control in composition, size, and shape. Discussion on the relationship between the key structural features and catalytic performance is focused on the application of Pt–Co intermetallic nanostructures as oxygen reduction reaction (ORR) electrocatalysts for hydrogen-powered PEMFCs. We emphasize specifically the importance of intermetallic structures for enhancing the durability and summarize the characterizations of their electrocatalytic performance in both three-electrode system and full cell studies. Finally, we provide our perspectives on the design, synthesis, characterization, and property studies of Pt–Co intermetallic nanoparticles as ORR electrocatalysts. This article should provide a new understanding on the design of ORR electrocatalytic applications using this class of intermetallics.