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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; Liu, XF
2018
Source PublicationACS CATALYSIS
ISSN2155-5435
Volume8Issue:9Pages:8953-8960
SubtypeArticle
AbstractRechargeable 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.
KeywordNa-O-2 battery nanosheets heterostructure electrocatalyst interface interpenetration
DOI10.1021/acscatal.8b01023
WOS KeywordSODIUM-OXYGEN BATTERIES ; RECHARGEABLE LI-O-2 BATTERIES ; EFFICIENT HYDROGEN EVOLUTION ; NITROGEN-DOPED CARBON ; AIR BATTERIES ; DISCHARGE PRODUCTS ; ALKALINE-SOLUTION ; CATALYST ; CATHODE ; CO3O4
Indexed BySCI ; EI
Language英语
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000444364800127
EI Accession Number20183505755033
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/286326
Collection多学科研究中心
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
Recommended Citation
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.
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