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

doi:10.1016/j.electacta.2020.136991

HFCAS OpenIR

	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-Liang 1; Xu, Qian-Qian 1; Zhou, Wen-Yi 3,4; Zhang, Yongxing 1; Yang, Meng 2
	2020-11-10
发表期刊	ELECTROCHIMICA ACTA
ISSN	0013-4686
通讯作者	Zhou, Wen-Yi(zhouwylucky@163.com) ; Zhang, Yongxing(zyx07157@mail.ustc.edu.cn) ; Yang, Meng(myang@iim.ac.cn)
摘要	It 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.
关键词	Multi-shell Mn-Co oxide Surface cycle Electron mediation Electrochemical sensing HMIs
DOI	10.1016/j.electacta.2020.136991
关键词[WOS]	SENSITIVE ELECTROCHEMICAL DETECTION ; HEAVY-METAL IONS ; ENVIRONMENTAL REMEDIATION ; PHOTOCHEMICAL FORMATION ; HYDROGEN-PEROXIDE ; IRON-OXIDE ; SURFACE ; ARSENIC(III) ; LEAD(II) ; REMOVAL
收录类别	SCI
语种	英语
资助项目	Natural 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]
项目资助者	Natural Science Foundation of Anhui Province ; China Postdoctoral Innovation Talents Supporting Project ; China Postdoctoral Science Foundation ; Postdoctoral Researcher Funding Project of Anhui Province
WOS研究方向	Electrochemistry
WOS类目	Electrochemistry
WOS记录号	WOS:000576817300016
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：11[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/104432
专题	中国科学院合肥物质科学研究院
通讯作者	Zhou, Wen-Yi; Zhang, Yongxing; Yang, Meng
作者单位	1.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
推荐引用方式 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).