材料科学技术(英文版)2022，Vol.110Issue(15) ：73-83.

Robust Fe2+-doped nickel-iron layered double hydroxide electrode for electrocatalytic reduction of hexavalent chromium by pulsed potential method

Zhifei Wang Jinbo Xue Yong Li Qianqian Shen Qi Li Xiaochao Zhang Xuguang Liu Husheng Jia
材料科学技术(英文版)2022，Vol.110Issue(15) ：73-83.
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Robust Fe2+-doped nickel-iron layered double hydroxide electrode for electrocatalytic reduction of hexavalent chromium by pulsed potential method

Zhifei Wang 1Jinbo Xue 2Yong Li 1Qianqian Shen 2Qi Li 3Xiaochao Zhang 4Xuguang Liu 1Husheng Jia1
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作者信息

  • 1. Key Laboratory of Interface Science and Engineering in Advanced Materials,Taiyuan University of Technology,Ministry of Education,Taiyuan 030024,China;College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China
  • 2. Key Laboratory of Interface Science and Engineering in Advanced Materials,Taiyuan University of Technology,Ministry of Education,Taiyuan 030024,China
  • 3. School of Materials Science and Engineering,Southwest Jiaotong University,Chengdu 610031,China
  • 4. College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024,China
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Abstract

Electrocatalytic reduction of Cr(Ⅵ)to less toxic Cr(Ⅲ)is deemed as a promising technique.Conventional electrocatalytic reduction is always driven by a constant cathodic potential,which exhibits a repelling action to Cr(Ⅵ)oxyanions in wastewater and consequently suppresses reduction kinetics.In order to remarkably accelerate Cr(Ⅵ)electrocatalytic reduction,we applied a pulsed potential on an Fe2+-NiFe LDH/NF electrode synthesized by in situ growth of Fe2+-doped NiFe LDH nanosheets on Ni foam using a spontaneous redox reaction.Under anodic potential section,HCrO4-anions are adsorbed on the electrode surface and reduced to Cr(Ⅲ)by Fe2+.Then,Cr(Ⅲ)ions are desorbed from the electrode surface under coulombic force.The regeneration of Fe2+and direct reduction of Cr(Ⅵ)are achieved under cathodic potential section.The pulsed potential can achieve complete elimination of Cr(Ⅵ)within 60 min at an initial concentration of 10 mg L-1,and the removal efficiency shows a 60％increase with respect to that under constant cathodic potential.

Key words

Hexavalent chromium/Electrocatalytic reduction/Pulsed potential/NiFe LDH/Fe cycle

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基金项目

国家自然科学基金(62004137)

国家自然科学基金(21878257)

国家自然科学基金(21978196)

Natural Science Foun-dation(NSF)of Shanxi Province(201701D221083)

Key Research and Development Program of Shanxi Province(201803D421079)

Scientific and Technological Innovation Pro-grams of Higher Education Institutions in Shanxi(2019L0156)

Shanxi Provincial Key Innovative Research Team in Science and Technology(201605D131045-10)

research Shanxi Scholarship Council of China(2020-050)

Horizontal Project(203010675-J)

Liaoning Baiqianwan Talents Program()

出版年

2022
材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI
影响因子：0.657
ISSN：1005-0302
参考文献量42
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