Ultrasmall α-MnO₂ with Low Aspect Ratio: Applications to Electrochemical Divalent-Ion Intercalation Hosts and Aerobic Oxidation Catalysts

KOBAYASHI Hiroaki

Department of Chemistry

Jan. 21, 2025

開発したアルコール溶液法で合成した 二酸化マンガン極小ナノ粒子

Joint press release (in Japanese)

Abstract
Hollandite-type α-MnO₂ exhibits exceptional promise in current industrial applications and in advancing next-generation green energy technologies, such as multivalent (Mg²⁺, Ca²⁺, and Zn²⁺) ion battery cathodes and aerobic oxidation catalysts. Considering the slow diffusion of multivalent cations within α-MnO₂ tunnels and the catalytic activity at edge surfaces, ultrasmall α-MnO₂ particles with a lower aspect ratio are expected to unlock the full potential. In this study, ultrasmall α-MnO₂ (<10 nm) with a low aspect ratio (c/a ≈ 2) is synthesized using a newly developed alcohol solution process. This material demonstrates….

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Article inforamation
Reona Iimura, Shiori Kawasaki, Takashi Yabu, Shinnosuke Tachibana, Kazuya Yamaguchi, Toshihiko Mandai, Kazuaki Kisu, Naoto Kitamura, Zhirong Zhao-Karger, Shin-ichi Orimo, Yasushi Idemoto, Masaki Matsui, Maximilian Fichtner, Itaru Honma, Tetsu Ichitsubo, Hiroaki Kobayashi, Ultrasmall α-MnO₂ with Low Aspect Ratio: Applications to Electrochemical Multivalent-Ion Intercalation Hosts and Aerobic Oxidation Catalysts, Small 16 January 2025
DOI：10.1002/smll.202411493