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Wood Carbon Based Single-Atom Catalyst for Rechargeable Zn–Air Batteries
ACS Energy Letters ( IF 19.3 ) Pub Date : 2021-09-21 , DOI: 10.1021/acsenergylett.1c01678
Linxin Zhong 1 , Chengyu Jiang 1 , Mengting Zheng 2 , Xinwen Peng 1 , Tongchao Liu 3 , Shibo Xi 4 , Xiao Chi 5 , Qinghua Zhang 6 , Lin Gu 6 , Shanqing Zhang 2 , Ge Shi 1 , Lei Zhang 1 , Kunze Wu 1 , Zehong Chen 1 , Tingzhen Li 1 , Mouad Dahbi 7 , Jones Alami 7 , Khalil Amine 3, 8 , Jun Lu 3
Affiliation  

Low-cost and efficient oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) bifunctional electrocatalysts are vital for the applications of rechargeable Zn–air batteries (ZABs). Given the high catalytic activity of single-atom catalysts (SACs), preparing SACs on a large scale for ZABs is desirable but remains challenging. Herein, in situ formation of single-atom Fe–N–C catalysts on plate wood-based porous carbon is achieved via a facile Lewis acid pretreatment and carbonization process. Lewis acid FeCl3 pretreatment on the cell wall of wood not only produces abundant microchannels but also successfully introduces atomically dispersed Fe–N active species into the hierarchical structure. Such uniformly dispersive SACs on the hierarchical structure enhance the ORR/OER performance and durability. A ZAB using the catalyst in the cathode shows a high power density (70.2 mW cm–2, at quasi solid state) and long-term stability. This work provides a new path for the large-scale preparation of high-performance SACs.

中文翻译:

用于可充电锌空气电池的木碳基单原子催化剂

低成本、高效的氧还原反应(ORR)/析氧反应(OER)双功能电催化剂对于可充电锌空气电池(ZABs)的应用至关重要。鉴于单原子催化剂 (SAC) 的高催化活性,大规模制备用于 ZAB 的 SAC 是可取的,但仍然具有挑战性。在此,通过简单的路易斯酸预处理和碳化过程,在板状木基多孔碳上原位形成单原子 Fe-N-C 催化剂。路易斯酸FeCl 3木材细胞壁上的预处理不仅产生丰富的微通道,而且成功地将原子分散的 Fe-N 活性物质引入到层次结构中。这种在分层结构上均匀分散的 SAC 增强了 ORR/OER 性能和耐久性。在阴极中使用催化剂的 ZAB 显示出高功率密度(70.2 mW cm –2,准固态)和长期稳定性。这项工作为大规模制备高性能SACs提供了新的途径。
更新日期:2021-10-08
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