Activating Mn3O4 by Morphology Tailoring for Oxygen Reduction Reaction

doi:10.1016/j.electacta.2016.04.103

	Activating Mn3O4 by Morphology Tailoring for Oxygen Reduction Reaction
	Liu, Jing 1,3; Jiang, Luhua 1; Zhang, Tianran 1; Jin, Jutao 1; Yuan, Lizhi 1,2; Sun, Gongquan 1
刊名	ELECTROCHIMICA ACTA
	2016-07-01
卷号	205 页码:38-44
关键词	Mn3o4 Nanocrystals Oxygen Reduction Reaction Electrocatalyst Alkaline Media
ISSN号	0013-4686
DOI	10.1016/j.electacta.2016.04.103
文献子类	Article
英文摘要	Oxygen reduction reaction (ORR) is becoming increasingly important with the development of fuel cells and metal-air batteries. Manganese oxides have been one of the focuses of recent research for Pt-alternative ORR catalysts. However, the structure-activity relationships of manganese oxides have not been well studied or understood. In the present work, we report a new finding that there is a strong dependence of the ORR activity of Mn3O4 on its morphology. By adopting different solvents in the wet-chemical synthesis, we are able to tailor the morphology of Mn3O4 from nanoparticles (NP-L, 12.5 nm and NP-S, 5.95 nm) to nanorods (NR, exposure of Mn3O4 (101)) and nanoflake (NF, exposure of Mn3O4 (001)). Surprisingly, surface-specific activity of NF toward the ORR was found to be one order of magnitude higher than NP-L. The morphology-activity relationships of Mn3O4 were further studied through a combination of electrochemical experiments and density functional theory (DFT) calculations. It was discovered that the formation of *OOH, concomitant with the first electron transfer, is the potential determining step, which is thermo-dynamically more facile on Mn3O4 (001) than (101) plane. The underlying mechanism could be ascribed to the strong interaction between O-2 and Mn3O4 (001) surface as indicated by the DFT calculations. The study enlarges our understanding of Mn3O4 catalysis and provides clues for rational design of highly efficient transitional metal oxide electrocatalysts for the ORR. (C) 2016 Published by Elsevier Ltd.
WOS关键词	NITROGEN-DOPED GRAPHENE ; CATALYTIC-PROPERTIES ; MANGANESE OXIDES ; ALKALINE-MEDIUM ; LOW-TEMPERATURE ; NANOPARTICLES ; ELECTROCATALYSTS ; CO ; MECHANISM ; OXIDATION
WOS研究方向	Electrochemistry
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000376138600006
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/170954]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Jiang, Luhua; Sun, Gongquan
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China 3.Univ Calif Los Angeles, Dept Chem & Biomol Engn, Los Angeles, CA 90095 USA
推荐引用方式 GB/T 7714	Liu, Jing,Jiang, Luhua,Zhang, Tianran,et al. Activating Mn3O4 by Morphology Tailoring for Oxygen Reduction Reaction[J]. ELECTROCHIMICA ACTA,2016,205:38-44.
APA	Liu, Jing,Jiang, Luhua,Zhang, Tianran,Jin, Jutao,Yuan, Lizhi,&Sun, Gongquan.(2016).Activating Mn3O4 by Morphology Tailoring for Oxygen Reduction Reaction.ELECTROCHIMICA ACTA,205,38-44.
MLA	Liu, Jing,et al."Activating Mn3O4 by Morphology Tailoring for Oxygen Reduction Reaction".ELECTROCHIMICA ACTA 205(2016):38-44.