Mechanochemical synthesis of multi-site electrocatalysts as bifunctional zinc-air battery electrodes

doi:10.1039/c9ta06411g

	Mechanochemical synthesis of multi-site electrocatalysts as bifunctional zinc-air battery electrodes
	Guo, Beibei; Ju, Qiangjian; Ma, Ruguang; Li, Zichuang; Liu, Qian; Ai, Fei; Yang, Minghui; Kaskel, Stefan; Luo, Jun; Zhang, Tao
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2019-09-07
卷号	7 期号:33 页码:19355
ISSN号	2050-7488
DOI	10.1039/c9ta06411g
文献子类	Article
英文摘要	The sluggish kinetics of two crucial reactions, the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), limit the practical application of rechargeable zinc-air batteries (ZABs). How to construct high-activity sites for the reversible ORR and OER together in the air cathode still remains challenging. Herein, by introducing Fe into Co-doped carbon, an efficient bifunctional ORR and OER electrocatalyst with multiple active sites of uniformly dispersed alloy nanoparticles, atomic-scale metal-N coordinated species and pyridinic-N groups has been successfully prepared by mechanochemical condensation and subsequent pyrolysis. Fe-doping into a Co-based system not only results in the formation of alloyed FeCo nanoparticles that greatly enhance the OER kinetics, but also helps increase the ratio of pyridinic-N and metal-N groups and promote electron transfer between the metal and N, significantly improving the ORR activity. DFT calculation reveals that the FeCo alloy is more energetically favorable than pure Co in the OER process through increasing the adsorption energy for OH and accelerating the dehydrogenation step. The ZABs assembled using the optimized electrocatalysts as the air cathode exhibit outstanding charge and discharge performance, large power density, and long cycling life, much better than those using precious metal catalysts Pt/C and RuO2. The present study presents a scalable mechanochemical strategy to synthesize low-cost carbon-based materials with well-defined multiple active sites, showing great promise in energy storage, adsorption, and catalysis.
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	ROYAL SOC CHEMISTRY
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/26847]
专题	中国科学院上海硅酸盐研究所
推荐引用方式 GB/T 7714	Guo, Beibei,Ju, Qiangjian,Ma, Ruguang,et al. Mechanochemical synthesis of multi-site electrocatalysts as bifunctional zinc-air battery electrodes[J]. JOURNAL OF MATERIALS CHEMISTRY A,2019,7(33):19355.
APA	Guo, Beibei.,Ju, Qiangjian.,Ma, Ruguang.,Li, Zichuang.,Liu, Qian.,...&Wang, Jiacheng.(2019).Mechanochemical synthesis of multi-site electrocatalysts as bifunctional zinc-air battery electrodes.JOURNAL OF MATERIALS CHEMISTRY A,7(33),19355.
MLA	Guo, Beibei,et al."Mechanochemical synthesis of multi-site electrocatalysts as bifunctional zinc-air battery electrodes".JOURNAL OF MATERIALS CHEMISTRY A 7.33(2019):19355.