Lateral Size Effects of Two-dimensional IrO₂ Nanosheets towards the Oxygen Evolution Reaction Activity

• TAKIMOTO Daisuke

  Interdisciplinary Graduate School of Science and Technology, Shinshu University

• AYATO Yusuke

  Faculty of Textile Science and Technology, Shinshu University Center for Energy and Environmental Science, Shinshu University

• MOCHIZUKI Dai

  Interdisciplinary Graduate School of Science and Technology, Shinshu University Faculty of Textile Science and Technology, Shinshu University Center for Energy and Environmental Science, Shinshu University

• SUGIMOTO Wataru

  Interdisciplinary Graduate School of Science and Technology, Shinshu University Faculty of Textile Science and Technology, Shinshu University Center for Energy and Environmental Science, Shinshu University

書誌事項

タイトル別名

• Lateral Size Effects of Two-dimensional IrO₂ Nanosheets towards the Oxygen Evolution Reaction Activity

抄録

The oxygen evolution reaction of anode catalyst is an important reaction in polymer electrolyte membrane water electrolysis. Recent research has focused on understanding the factors governing the catalytic properties of nanostructured IrO₂ in order to decrease the use of expensive and precious IrO₂. We demonstrate here the equivalent diameter (D_e) effect (lateral size effect) of IrO₂ nanosheets for the oxygen evolution reaction. IrO₂ nanosheets with four different D_e from 110 to 260 nm and same thickness (∼1.5 nm) were prepared. The electrical double layer capacitance, which should be proportional to the electrochemically active surface area, of IrO₂ nanosheets was independent of D_e. On the other hand, the pseudo-capacitance, which is related to surface redox processes, and the oxygen evolution reaction activity increased with decreasing D_e. The enhanced oxygen evolution reaction activity is discussed based on the electrochemically active surface area and edge effect.

収録刊行物

• Electrochemistry

  Electrochemistry 85 (12), 779-783, 2017

  公益社団法人　電気化学会

キーワード

• Oxygen Evolution Reaction
• Iridium Oxide
• Nanosheet
• Lateral Size Effect

詳細情報

• CRID: 1390282681476300160
• NII論文ID: 130006242962
• NII書誌ID: AN00151637
• DOI: 10.5796/electrochemistry.85.779
• ISSN: 21862451
• ISSN: 13443542
• NDL書誌ID: 028688885
• Web Site: http://id.ndl.go.jp/bib/028688885
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I028688885
• Web Site: https://www.jstage.jst.go.jp/article/electrochemistry/85/12/85_17-E00053/_pdf
• 本文言語コード: en
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