Oxygen Evolution and Reduction Reactions on La₀.₈Sr₀.₂CoO₃(001), (110), and (111) Surfaces in an Alkaline Solution

• KOMO Mamoru

  Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology

• HAGIWARA Asuna

  Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology

• TAMINATO Sou

  Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology

• HIRAYAMA Masaaki

  Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology

• KANNO Ryoji

  Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology

書誌事項

タイトル別名

• Oxygen Evolution and Reduction Reactions on La_0.8Sr_0.2CoO₃ (001), (110), and (111) Surfaces in an Alkaline Solution

抄録

The oxygen evolution and reduction properties of La_0.8Sr_0.2CoO₃ are characterized using two-dimensional model electrodes with different reaction planes, synthesized on SrTiO₃ single crystal substrates by pulsed laser deposition. Thin-film X-ray diffraction and reflectivity measurements confirm the epitaxial growth of 29-nm-thick La_0.8Sr_0.2CoO₃ (001), (110), and (111) films on SrTiO₃ (001), (110), and (111) substrates, respectively. Cyclic voltammetry curves in 1-M KOH aqueous solution indicate that the (110) film has the highest activity for oxygen evolution and reduction reactions. An expansion of the La_0.8Sr_0.2CoO₃ lattice is observed after the oxygen reduction process, indicating the formation of oxygen defects, with the highest number of defects being produced in the (110) film. X-ray reflectivity analysis demonstrates the formation of a surface layer on the La_0.8Sr_0.2CoO₃ films during electrochemical cycling due to the decomposition of La_0.8Sr_0.2CoO₃. The surface structure constructed at the electrode/electrolyte interface is a crucial factor influencing oxygen evolution and reduction activity of La_0.8Sr_0.2CoO₃.

収録刊行物

• Electrochemistry

  Electrochemistry 80 (10), 834-838, 2012

  公益社団法人　電気化学会

キーワード

• Rechargeable Metal Air Battery
• Perovskite Catalyst
• Bi-Functional Electrode
• Epitaxial Film

詳細情報

• CRID: 1390001206495459072
• NII論文ID: 130002147512
• NII書誌ID: AN00151637
• DOI: 10.5796/electrochemistry.80.834
• COI: 1:CAS:528:DC%2BC38XhsFGlu7bJ
• ISSN: 21862451
• ISSN: 13443542
• NDL書誌ID: 023981814
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I023981814
• Web Site: https://www.jstage.jst.go.jp/article/electrochemistry/80/10/80_12-4-E50724/_pdf
• 本文言語コード: en
• データソース種別:
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• 抄録ライセンスフラグ: 使用可