Effects of Additional Elements on Electrocatalytic Properties of Thermally Decomposed Manganese Oxide Electrodes for Oxygen Evolution from Seawater

• Izumiya K.

  Institute for Materials Research, Tohoku University

• Akiyama E.

  Institute for Materials Research, Tohoku University

• Habazaki H.

  Institute for Materials Research, Tohoku University

• Kumagai N.

  Daiki Engineering Co., Ltd.

• Kawashima A.

  Institute for Materials Research, Tohoku University

• Hashimoto K.

  Institute for Materials Research, Tohoku University

Bibliographic Information

Other Title

• Effects of Additional Elements on Elect

Abstract

Manganese oxide electrodes with some additives enhance oxygen evolution efficiency in seawater electrolysis. Electrodes were prepared by a thermal decomposition method. IrO₂-coated titanium (IrO₂/Ti electrode) was used as the substrate on which manganese oxide (MnO_X/IrO₂/Ti) and oxide mixtures of manganese and iridium, ruthenium, platinum, iron, cobalt, nickel, tin, lanthanum, cerium or molybdenum ((Mn–M)O_X/IrO₂/Ti electrode, M: additives) were coated. The oxygen evolution efficiency of the MnO_X/IrO₂/Ti electrode was 68–70%. The addition of small amounts of nickel, cobalt, iron or tin enhanced the oxygen evolution efficiency. However the addition of excess amounts of these elements and additions of noble metals, cerium or lanthanum were detrimental for the oxygen evolution.<BR>Among the additives examined, molybdenum was the most effective additional element to increase the oxygen evolution efficiency. The addition of a small amount of molybdenum leads to a remarkable increase in the oxygen evolution efficiency up to 91%. The formation of a single phase Mn₂O₃ with molybdenum ions seems to be responsible for the high efficiency for oxygen evolution.

Journal

• Materials Transactions, JIM

  Materials Transactions, JIM 38 (10), 899-905, 1997

  The Japan Institute of Metals

Keywords

• oxygen evolution
• anode
• seawater
• manganese oxide
• molybdenum
• thermal decomposition
• oxygen evolution efficiency
• coating

Details

• CRID: 1390001204245653376
• NII Article ID: 130003556854
• NII Article ID: 10002454054
• NII Book ID: AA10699969
• DOI: 10.2320/matertrans1989.38.899
• COI: 1:CAS:528:DyaK1cXktFGktg%3D%3D
• ISSN: 2432471X
• ISSN: 09161821
• ISSN: http://id.crossref.org/issn/09161821
• NDL BIB ID: 4337928
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4337928
• Web Site: https://www.jstage.jst.go.jp/article/matertrans1989/38/10/38_10_899/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed