Chemical State Analysis on Ni Species Supported on Carbon During Electrochemical Reduction Process

DOI オープンアクセス
  • Ishida Takaya
    Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University
  • Tsuji Takuya
    Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University
  • Yamagishi Hirona
    The SR Center, Ritsumeikan University
  • Yamamoto Yusaku
    Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University
  • Katayama Misaki
    The SR Center, Ritsumeikan University
  • Inada Yasuhiro
    Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University

抄録

Initial electrochemical reduction mechanism of NiO supported on acetylene black (NiO/AB) has been analyzed by the X-ray absorption fine structure (XAFS) measurements. The extended X-ray absorption fine structure analysis has revealed that the particle size of the Ni species becomes small during the conversion from NiO to Ni(0) at the first reduction process, which is accompanied by the formation of Li2CO3. The X-ray absorption near edge structure analysis at the O K-edge has clarified that the formation of Li2CO3 is started below 1 V using Li counter electrode, suggesting the decomposition of electrolyte solvent. The reduction of NiO takes place after a certain amount of reduction current has flowed. The XAFS analysis in this study supports that ionic compounds containing Li+ is necessary for the reduction of NiO in order to receive the oxide ions from NiO.

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詳細情報

  • CRID
    1390852095370164864
  • NII論文ID
    130008077232
  • DOI
    10.34521/srmemoirs.23.0_3
  • ISSN
    24357634
    13451650
  • 本文言語コード
    en
  • データソース種別
    • JaLC
    • CiNii Articles
    • KAKEN
  • 抄録ライセンスフラグ
    使用可

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