Chemical State Analysis on Ni Species Supported on Carbon During Electrochemical Reduction Process
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- Ishida Takaya
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University
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- Tsuji Takuya
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University
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- Yamagishi Hirona
- The SR Center, Ritsumeikan University
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- Yamamoto Yusaku
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University
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- Katayama Misaki
- The SR Center, Ritsumeikan University
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- 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.
収録刊行物
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- 立命館大学SRセンター紀要
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立命館大学SRセンター紀要 23 (0), 3-8, 2021
学校法人立命館 立命館大学SRセンター
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詳細情報
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- CRID
- 1390852095370164864
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- NII論文ID
- 130008077232
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- ISSN
- 24357634
- 13451650
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用可