Cover Story
封/面/故/事
本文为综述类文章，重点阐述了质子交换膜燃料电池阴极用氧还原反应电催化剂从传统铂（Pt）基催化剂到新兴Pt单原子催化剂的发展。基于文章内容，封面图的整体构图思路如下：
（1）本文主要内容描述的是催化剂的研究进展：从传统Pt催化剂（纯碳表面支撑Pt颗粒）如图1所示，到新兴Pt单原子催化剂（Pt原子通常直接连接4个氮原子形成Pt-N4掺杂到碳网络中）如图2所示
（2）催化剂最终是要应用于燃料电池中，燃料电池给氢燃料电池汽车、飞机、轮船等设备供电
（3）本文是氢能和燃料电池方面的，综合色调较为清新
About the Cover Image
Cheng YUAN, Shiming ZHANG, Jiujun ZHANG. Oxygen reduction electrocatalysis: From conventional to single-atomic platinum-based catalysts for proton exchange membrane fuel cells. p206-222
Platinum (Pt)-based materials are still the most efficient and practical catalysts to drive the sluggish kinetics of cathodic oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). However, their catalysis and stability performance still need to be further improved in terms of corrosion of both carbon support and Pt catalyst particles as well as Pt loading reduction. Based on the developed synthetic strategies of alloying/nanostructuring Pt particles and modifying/innovating supports in developing conventional Pt-based catalysts, Pt single-atom catalysts (Pt SACs) as the recently burgeoning hot materials with a potential to achieve the maximum utilization of Pt are comprehensively reviewed in this paper. The design thoughts and synthesis of various isolated, alloyed, and nanoparticle-contained Pt SACs are summarized. The single-atomic Pt coordinating with non-metals and alloying with metals as well as the metal-support interactions of Pt single-atoms with carbon/non-carbon supports are emphasized in terms of the ORR activity and stability of the catalysts. To advance further research and development of Pt SACs for viable implementation in PEMFCs, various technical challenges and several potential research directions are outlined.
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张久俊院士/张世明副教授：质子交换膜燃料电池氧还原电催化——从传统到单原子铂基催化剂
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小提示：Frontiers in Energy为国产英文刊，不属于瑞士Frontiers系列。瑞士Frontiers系列相关期刊为Frontiers in Energy Research。
