CoO/CoP Heterostructured Nanosheets with an O-P Interpenetrated Interface as a Bifunctional Electrocatalyst for Na-O-2 Battery

doi:10.1021/acscatal.8b01023

	CoO/CoP Heterostructured Nanosheets with an O-P Interpenetrated Interface as a Bifunctional Electrocatalyst for Na-O-2 Battery
	Wang, JK; Gao, R; Zheng LR(郑黎荣); Chen ZJ(陈中军); Wu ZH(吴忠华); Zheng, LR; Chen, ZJ; Wu, ZH; Sun, LM; Hu, ZB
刊名	ACS CATALYSIS
	2018
卷号	8 期号:9 页码:8953-8960
关键词	Na-O-2 battery nanosheets heterostructure electrocatalyst interface interpenetration
ISSN号	2155-5435
DOI	10.1021/acscatal.8b01023
文献子类	Article
英文摘要	Rechargeable Na-O-2 batteries have attracted great interest because of their high energy density and low cost. But the lack of inexpensive bifunctional efficient electrocatalysts, which can simultaneously boost oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), critically hinders their application. Herein, CoO/CoP heterostructured ultrathin nanosheets with an O-P interpenetrated interface have been synthesized through a controlled phosphatization of Co(CO3)(0.5)(OH)0.11H(2)O nanosheets, which combine the advantages of the high OER activity of CoP and the high ORR activity of CoO. ORR and OER activity are simultaneously boosted due to the interpenetration of O-P at the interface of CoO/CoP heterostructure, whose ORR or OER activity even exceeds that of parent CoO or CoP. ORR activity is in this order: CoO/CoP > Co3O4 approximate to CoO > CoP while the order for OER is CoO/CoP > CoP > Co3O4 > CoO. O-P interpenetration improves the conductivity and electron transfer of CoO or CoP owing to the interdoping effect, which is largely responsible for the simultaneous enhancement of OER and ORR activity. The initial capacity, rate capability, and cycle stability of Na-O-2 battery using CoO/CoP heterostructured nanosheets as cathode catalysts have been largely improved because of the simultaneous enhancement of OER and ORR activity. Additionally, the phase evolution of the discharged product of Na-O-2 battery is also unraveled by in situ X-ray diffraction and ex situ scanning electron microscopy. This study is also instructive to the design of efficient bifunctional electrocatalysts through constructing a heterostructure with an interpenetrated interface.
WOS关键词	SODIUM-OXYGEN BATTERIES ; RECHARGEABLE LI-O-2 BATTERIES ; EFFICIENT HYDROGEN EVOLUTION ; NITROGEN-DOPED CARBON ; AIR BATTERIES ; DISCHARGE PRODUCTS ; ALKALINE-SOLUTION ; CATALYST ; CATHODE ; CO3O4
WOS研究方向	Chemistry
语种	英语
WOS记录号	WOS:000444364800127
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286326]
专题	高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Wang, JK,Gao, R,Zheng LR,et al. CoO/CoP Heterostructured Nanosheets with an O-P Interpenetrated Interface as a Bifunctional Electrocatalyst for Na-O-2 Battery[J]. ACS CATALYSIS,2018,8(9):8953-8960.
APA	Wang, JK.,Gao, R.,郑黎荣.,陈中军.,吴忠华.,...&Liu, XF.(2018).CoO/CoP Heterostructured Nanosheets with an O-P Interpenetrated Interface as a Bifunctional Electrocatalyst for Na-O-2 Battery.ACS CATALYSIS,8(9),8953-8960.
MLA	Wang, JK,et al."CoO/CoP Heterostructured Nanosheets with an O-P Interpenetrated Interface as a Bifunctional Electrocatalyst for Na-O-2 Battery".ACS CATALYSIS 8.9(2018):8953-8960.