Surface-confined Pt-based catalysts for strengthening oxygen reduction performance
Surface-confined Pt-based catalysts for strengthening oxygen reduction performance
复制标题
用于增强氧还原性能的表面限制铂基催化剂
DOI：
10.1016/j.pnsc.2020.10.004
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发表时间：
2020-11
期刊：
影响因子：
--
通讯作者：
Zidong Wei
中科院分区：
文献类型：
--
作者：
Yao Nie;Zidong Wei
开发用于氧还原反应（ORR）的高效催化剂是制造用于未来能源应用的商业上可行的燃料电池装置的关键。通过调节Pt纳米晶体的暴露面并将Pt与其他金属组合以产生具有合金、核-壳、分支或各向异性形式的结构的纳米晶体，已经在减少Pt使用和改善Pt催化剂的性能方面取得了相当大的进展。除了上述方法之外，用精心选择的层如聚合物、硅或碳限制Pt基纳米颗粒（NP）表面也可以导致优化的Pt电子结构，这有利于ORR过程。本文综述了近年来铂基表面限制型氧化还原电催化剂的研究进展，重点介绍了铂基表面限制型氧化还原电催化剂的设计策略和合成方法。这些催化剂的整合到ORR操作和由此产生的性能以及强化机制进行了讨论。同时，对铂基表面限制型氧化还原催化剂的研究方向进行了展望。
Developing highly efficient catalysts for the oxygen reduction reaction (ORR) is a key to the fabrication of commercially viable fuel cell devices for future energy applications. Considerable progress has been made to reduce Pt usage and improve performance of the Pt catalysts by modulating exposed facets of Pt nanocrystals and combining Pt with other metals to generate bimetallic nanocrystals with structures in the form of alloys, core-shells, branches or anisotropies. Apart from the above methods, confining Pt-based nanoparticles (NPs) surfaces with elaborately selected layers such as polymers, silicon or carbons can also lead to an optimized Pt electronic structure, which is beneficial to ORR process. In this minireview, we summarize the recent advancements in the area of surface-confined Pt-based electrocatalysts for ORR with emphasis on introducing the design strategies and synthesis methodologies. The integration of these catalysts into ORR operations and the resulting performance as well as the strengthening mechanisms is also discussed. Meanwhile, the insights into the research directions are proposed in order to shed light on the future development of surface-confined Pt-based ORR catalysts.
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