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Engineering multi-shell Mn-Co oxide for ultrasensitive electroanalysis of Pb(II) in mining subsidence area water with promotion of adsorption and electron mediation: Behaviors and mechanisms of Mn(II)/Mn(III) and Co(II)/Co(III) cycles
Li, Shan-Shan1; Cheng, Xing-Liang1; Xu, Qian-Qian1; Zhou, Wen-Yi3,4; Zhang, Yongxing1; Yang, Meng2
2020-11-10
Source PublicationELECTROCHIMICA ACTA
ISSN0013-4686
Corresponding AuthorZhou, Wen-Yi(zhouwylucky@163.com) ; Zhang, Yongxing(zyx07157@mail.ustc.edu.cn) ; Yang, Meng(myang@iim.ac.cn)
AbstractIt still remains unclear that the intrinsic structure-sensing property interplay of diverse transition metal oxides based sensing materials, although they have been applied in the field of environmental analysis and have achieved great progress. In this work, we performed X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET) and in situ electrochemical experiment to investigate the structure-sensing interplay of Mn-Co oxide (MnCo2O4) multi-shell hiberarchy microsphere. The comprehensive studies conclusively show that the active sites on MnCo2O4 surface work as key role in determining the electrochemical behavior through the aspect of adsorption and electrocatalytic activity. In detail, the exposed oxygen on the surface of MnCo2O4 forming amounts of -OH can act as grippers to adsorb the Pb(II) in water, and then the adsorbed Pb(II) can directly occur redox in situ by the mediation of Mn(II)/(III) and Co(II)/(III) cycle on the exposed Mn and Co active sites. As a result, an excellent electroanalytical behavior (sensitivity of 120.72 mu A mu M-1) toward Pb(II) could be effectively improved on MnCo2O4. The fabricated electrode also showed impressive electroanalytical performance for Pb(II) in mining subsidence area. Our findings will provide new insights and effective directions for designing ultr-sensitive nanomaterials based on variable valence mediation engineering in tuning the activity of transition metal oxides. (C) 2020 Elsevier Ltd. All rights reserved.
KeywordMulti-shell Mn-Co oxide Surface cycle Electron mediation Electrochemical sensing HMIs
DOI10.1016/j.electacta.2020.136991
WOS KeywordSENSITIVE ELECTROCHEMICAL DETECTION ; HEAVY-METAL IONS ; ENVIRONMENTAL REMEDIATION ; PHOTOCHEMICAL FORMATION ; HYDROGEN-PEROXIDE ; IRON-OXIDE ; SURFACE ; ARSENIC(III) ; LEAD(II) ; REMOVAL
Indexed BySCI
Language英语
Funding ProjectNatural Science Foundation of Anhui Province[2008085QB70] ; Natural Science Foundation of Anhui Province[2008085QB79] ; China Postdoctoral Innovation Talents Supporting Project[BX20180311] ; China Postdoctoral Science Foundation[2019M652220] ; China Postdoctoral Science Foundation[2019M663031] ; Postdoctoral Researcher Funding Project of Anhui Province[2018B244]
Funding OrganizationNatural Science Foundation of Anhui Province ; China Postdoctoral Innovation Talents Supporting Project ; China Postdoctoral Science Foundation ; Postdoctoral Researcher Funding Project of Anhui Province
WOS Research AreaElectrochemistry
WOS SubjectElectrochemistry
WOS IDWOS:000576817300016
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.hfcas.ac.cn:8080/handle/334002/104432
Collection中国科学院合肥物质科学研究院
Corresponding AuthorZhou, Wen-Yi; Zhang, Yongxing; Yang, Meng
Affiliation1.Huaibei Normal Univ, Dept Mat Sci & Engn, Anhui Prov Key Lab Pollutant Sensit Mat & Environ, Huaibei 235000, Peoples R China
2.Chinese Acad Sci, Inst Solid State Phys, Hefei 230031, Peoples R China
3.Shenzhen Univ, Inst Microscale Optoeletron, Engn Technol Res Ctr 2D Mat Informat Funct Device, Minist Educ,Int Collaborat Lab 2D Mat Optoelect S, Shenzhen 518060, Peoples R China
4.Int Iberian Nanotechnol Lab INL, Avenide Mestre Jose Veiga, P-4715330 Braga, Portugal
Recommended Citation
GB/T 7714
Li, Shan-Shan,Cheng, Xing-Liang,Xu, Qian-Qian,et al. Engineering multi-shell Mn-Co oxide for ultrasensitive electroanalysis of Pb(II) in mining subsidence area water with promotion of adsorption and electron mediation: Behaviors and mechanisms of Mn(II)/Mn(III) and Co(II)/Co(III) cycles[J]. ELECTROCHIMICA ACTA,2020,360.
APA Li, Shan-Shan,Cheng, Xing-Liang,Xu, Qian-Qian,Zhou, Wen-Yi,Zhang, Yongxing,&Yang, Meng.(2020).Engineering multi-shell Mn-Co oxide for ultrasensitive electroanalysis of Pb(II) in mining subsidence area water with promotion of adsorption and electron mediation: Behaviors and mechanisms of Mn(II)/Mn(III) and Co(II)/Co(III) cycles.ELECTROCHIMICA ACTA,360.
MLA Li, Shan-Shan,et al."Engineering multi-shell Mn-Co oxide for ultrasensitive electroanalysis of Pb(II) in mining subsidence area water with promotion of adsorption and electron mediation: Behaviors and mechanisms of Mn(II)/Mn(III) and Co(II)/Co(III) cycles".ELECTROCHIMICA ACTA 360(2020).
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