Development of a MnOOH Mineral Electrocatalyst for Water Splitting by Controlling the Surface Defects of a Naturally Occurring Ore

• Shun Tsunekawa

  Yamaguchi University, Tokiwadai, Ube, Yamaguchi 755-8611 , Japan

• Arisu Sakai

  Yamaguchi University, Tokiwadai, Ube, Yamaguchi 755-8611 , Japan

• Yoshiaki Tamura

  University of Toyama, Gofuku, Toyama 930-8555 , Japan

• Keisuke Hatada

  University of Toyama, Gofuku, Toyama 930-8555 , Japan

• Toshiaki Ina

  Japan Synchrotron Radiation Research Institute (JASRI), Sayo, Hyogo 679-5198 , Japan

• Ke-Hsuan Wang

  Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo 162-8601 , Japan

• Takeshi Kawai

  Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo 162-8601 , Japan

• Masaaki Yoshida

  Yamaguchi University, Tokiwadai, Ube, Yamaguchi 755-8611 , Japan

Abstract

A MnOOH-based mineral electrocatalyst for the oxygen evolution reaction was developed using a natural ore that is typically insulating, simply by applying a ball milling treatment. This material catalytically decomposed water molecules to generate oxygen. Mn K-edge X-ray absorption spectroscopy analyses in the bulk and surface sensitive modes indicated that structural distortion at the surface provided the catalytically active sites. The formation of oxygen vacancies on natural ore surfaces is likely to be the key to developing efficient mineral electrocatalysts.

Journal

• Chemistry Letters

  Chemistry Letters 51 (1), 50-53, 2021-12-16

  Oxford University Press (OUP)

Keywords

• General Chemistry

Details

• CRID: 1360009581165981568
• NII Article ID: 130008137564
• DOI: 10.1246/cl.210539
• ISSN: 13480715
• ISSN: 03667022
• Web Site: https://academic.oup.com/chemlett/article-pdf/51/1/50/56300611/cl.210539.pdf
• Data Source:
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