In-situ growth of zero-valent iron in FeOx/Mn3O4 to improve the surficial redox for high-efficient electrocatalysis of Pb(II)

doi:10.1016/j.cej.2021.132959

	In-situ growth of zero-valent iron in FeOx/Mn3O4 to improve the surficial redox for high-efficient electrocatalysis of Pb(II)
	Chen, Shi-Hua 1,2,3; Zhu, Jun-Jian 4; Li, Pei-Hua 1,2; Sun, Yu-Feng 4; Yang, Meng 1,2; Huang, Xing-Jiu 1,2,3
刊名	CHEMICAL ENGINEERING JOURNAL
	2022-02-15
卷号	430
关键词	FeOx/Mn3O4 Pb(II) Surficial redox High-energy interface Fe metal Valance cycles
ISSN号	1385-8947
DOI	10.1016/j.cej.2021.132959
通讯作者	Li, Pei-Hua(peihuali@issp.ac.cn) ; Sun, Yu-Feng(sunyufeng118@126.com) ; Yang, Meng(myang@iim.ac.cn)
英文摘要	Fruitful achievements on electrochemically detecting Pb(II) have been achieved in virtue of the excellent adsorption property of nanomaterials, while ignoring the surficial redox and electrons transfer process. Due to the severe toxicity, trace concentration of Pb(II) in complex samples, the efforts to improve the sensitivity and selectivity of the sensing interface are still ongoing. Herein, FeOx/Mn3O4 nanocomposites have been successfully prepared with the generation of high-energy structures of Mn-O-Fe bonds. Surprising, electrons outflowed from Mn3O4 through Mn-O-Fe, thus in-situ growing zero-valance Fe metal. Although FeOx/Mn3O4 showed worse adsorption of Pb(II) than Mn3O4, the electrochemical sensing interface based on which obtained an ultrahigh sensitivity of 111.89 mu A mu M-1 with a limit of detection (LOD) of 0.01 mu M toward Pb(II), far more significant than the reported results. Moreover, the high-energy interfacial Mn-O-Fe in FeOx/Mn3O4 promoted the process of electrons transfer, which also have a strong interaction with Pb(II). Besides, Mn(II)/Mn(III) and Fe(II)/Fe(III) cycles on the surface of FeOx/Mn3O4 were confirmed to actively participate in the electrocatalysis of Pb(II), and Fe(0) with plentiful electrons further accelerated the surficial redox, thus ensuring the high sensitivity. Significantly, FeOx/Mn3O4 modified electrodes showed high selectivity due to the selective adsorption, which also has excellent stability, reproductivity and practicability in actual water samples. This work provides guidelines for constructing sensitive interfaces toward ultra-low concentrations of pollutants, which is of great significance for practical engineering application of electrochemical sensors.
资助项目	National Natural Science Foundation of China[21735005] ; Natural Science Foundation of Anhui Province[2008085QB79] ; China National Postdoctoral Program for Innovative Talents[BX20180311] ; China National Postdoctoral Program for Innovative Talents[BX2021317] ; China Postdoctoral Science Foundation[2019 M652220] ; Project of the National Natural Science Foundation of China[U1932119] ; National Key Basic Research Program of China[2017YFA0403402]
WOS关键词	ELECTROCHEMICAL DETECTION ; AU NANOPARTICLES ; METAL-IONS ; OXYGEN ; OXIDE ; PERFORMANCE ; ADSORPTION ; ELECTROANALYSIS ; EVOLUTION ; WATER
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000723500800002
资助机构	National Natural Science Foundation of China ; Natural Science Foundation of Anhui Province ; China National Postdoctoral Program for Innovative Talents ; China Postdoctoral Science Foundation ; Project of the National Natural Science Foundation of China ; National Key Basic Research Program of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/126738]
专题	中国科学院合肥物质科学研究院
通讯作者	Li, Pei-Hua; Sun, Yu-Feng; Yang, Meng
作者单位	1.Chinese Acad Sci, HFIPS, Inst Solid State Phys, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China 2.Chinese Acad Sci, HFIPS, Inst Solid State Phys, Environm Mat & Pollut Control Lab, Hefei 230031, Peoples R China 3.Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei 230026, Peoples R China 4.Anhui Polytech Univ, Coll Mech & Automot Engn, Wuhu 241000, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Chen, Shi-Hua,Zhu, Jun-Jian,Li, Pei-Hua,et al. In-situ growth of zero-valent iron in FeOx/Mn3O4 to improve the surficial redox for high-efficient electrocatalysis of Pb(II)[J]. CHEMICAL ENGINEERING JOURNAL,2022,430.
APA	Chen, Shi-Hua,Zhu, Jun-Jian,Li, Pei-Hua,Sun, Yu-Feng,Yang, Meng,&Huang, Xing-Jiu.(2022).In-situ growth of zero-valent iron in FeOx/Mn3O4 to improve the surficial redox for high-efficient electrocatalysis of Pb(II).CHEMICAL ENGINEERING JOURNAL,430.
MLA	Chen, Shi-Hua,et al."In-situ growth of zero-valent iron in FeOx/Mn3O4 to improve the surficial redox for high-efficient electrocatalysis of Pb(II)".CHEMICAL ENGINEERING JOURNAL 430(2022).