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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/118685


    Title: Identifying the crystal and electronic structure evolution in tri-component transition metal oxide nanosheets for efficient electrocatalytic oxygen evolution
    Authors: Zhang, X.;Dong, C. L.;Diao, Z.;Lu, Y. R.;Shen, S.
    Keywords: crystal structures;electrocatalytic water splitting;electronic structures;oxygen evolutionreaction;transition metal oxides
    Date: 2019-11-23
    Issue Date: 2020-06-01 12:13:24 (UTC+8)
    Abstract: Transition metal oxides (TMOs) nanosheets comprised of earth abundant Fe, Co,and Ni elements have been designed. Remarkably, the tri-component NiCoFeOx/Nifoam (NF) electrode delivers a high current density of 100 mA cm−2at an over-potential of only ≈383 mV for oxygen evolution reaction (OER), with prolongedelectrochemical stability. The improved OER activity of NiCoFeOx/NF can beascribed to the simultaneous incorporation of Ni and Co into FeOx/NF, boostingthe intrinsic catalytic activities by altering the crystal and electronic structures.With electron redistribution happening in the tri-component NiCoFeOx/NF, theelectron transfer from Co to Ni through the Fe acting as the electron transferbridge renders Co more acidic (Lewis acid) to activate H2O (Lewis base) moleculesthrough Lewis acid-base interaction. By identifying the interactions of Fe, Co, andNi and electron redistribution in the tri-component TMOs, this study providesnew insights into the crystal and electronic structure evolution of tri-componentNiCoFeOxcatalysts for active electrocatalysis.
    Relation: EcoMat 1(1)
    DOI: 10.1002/eom2.12005
    Appears in Collections:[Graduate Institute & Department of Physics] Journal Article

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