Advances in single-atom catalysts for oxygen electrodes

doi:10.11949/0438-1157.20190615

Abstract

Abstract:

As the most promising energy conversion and storage devices, fuel cells and metal-air batteries are of great benefit in alleviating the energy and environmental problems. However, the sluggish oxygen electrode reactions, including oxygen reduction reaction (ORR) for fuel cell and ORR couple with oxygen evolution reaction (OER) for zinc-air batteries, seriously limit the efficient of both types of devices. In recent years, single-atoms catalysts (SACs) have been proposed to improve the kinetics of oxygen electrode reaction. Therefore, for these two types of oxygen electrode reactions, this review firstly summarized their possible mechanism. Then, the SACs were classified by the different metal elements for both ORR and OER. Thus, noble-metal-based and non-noble-metal-based catalysts have been summarized in these two reactions. At the same time, a summary of the dual-function catalyst and its application in zinc air batteries is also given. Finally, in view of the current problems and future development directions of SACs, suggestions are put forward, aiming to pave the way for the design and development of monoatomic oxygen electrode catalysts.

Key words: single-atom catalyst, oxygen reduction reaction, oxygen evolution reaction, bifunctional catalyst, fuel cells, zinc-air batteries

摘要：

燃料电池和金属-空气电池作为目前最具发展前景的能量转换和储存设备，对于缓解人类发展所面临的能源与环境问题大有裨益。然而，较差的氧电极反应，如燃料电池中的氧还原反应以及锌空电池中的氧还原及析氧反应，却限制着这两类装置的高效运行。近年来，人们提出了利用单原子催化剂（SACs）来提高氧电极反应的反应动力学。因此，针对两类氧电极反应，本综述根据构成活性位点的不同金属元素进行了分类总结，重点关注了各类催化剂的共性及进展。同时，还对具有双功能的催化剂及其在锌空电池的应用进行了总结。最后，针对SACs目前存在的问题和未来的发展方向提出了建议，旨在为单原子氧电极催化剂的设计及发展指明道路。

关键词: 单原子催化剂, 氧还原反应, 析氧反应, 双功能催化剂, 燃料电池, 锌空电池

CLC Number:

TQ 028.8

Yao WANG,Yiyun TANG. Advances in single-atom catalysts for oxygen electrodes[J]. CIESC Journal, 2020, 71(10): 4409-4428.

王尧,唐艺芸. 氧电极金属单原子催化剂的研究进展[J]. 化工学报, 2020, 71(10): 4409-4428.

Figures/Tables 20

References 108

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