- 著者
- Ke-Hsuan WANG Genta WATANABE Hayato IKEUCHI Siyang CUI I-Ping LIU Kanta YAMADA Masaaki YOSHIDA Takeshi KAWAI
- 出版者
- The Japan Society for Analytical Chemistry
- 雑誌
- Analytical Sciences (ISSN:09106340)
- 巻号頁・発行日
- vol.36, no.1, pp.27-34, 2020-01-10 (Released:2020-01-10)
- 参考文献数
- 43
- 被引用文献数
- 6
A key requirement in developing oxygen evolution reaction (OER) electrocatalysts is increasing their surface area. Herein, we report the design of a hierarchical micro/nanostructured catalyst. Based on polystyrene colloidal template electrodeposition, an ordered microcup array surrounded by nanoflakes was fabricated. The effect of the deposition time on the formation of the catalyst and the corresponding OER performance of the catalyst were investigated using scanning electron microscopy, in situ X-ray absorption fine structure (XAFS) spectroscopy, and electrochemical analysis. The in situ XAFS measurements indicate that the structure of the hierarchical structured catalyst is similar to that of γ-FeOOH. The electrochemical analysis indicates that the hierarchical catalyst has a large surface area and a low charge transfer resistance, which lead to its excellent catalytic performance for the OER. Our study provides new insights in designing high-performance OER catalysts. Moreover, the synthesized hierarchical micro/nanostructured catalyst could be used as a platform for further studies on low-cost iron-based electrocatalysts.
1 0 0 0 OA THE DEMOCRATIC COMPACTIFICATION OF CONFIGURATION SPACES OF POINT SETS ON THE REAL PROJECTIVE LINE
- 著者
- Masaaki YOSHIDA
- 出版者
- Faculty of Mathematics, Kyushu University
- 雑誌
- Kyushu Journal of Mathematics (ISSN:13406116)
- 巻号頁・発行日
- vol.50, no.2, pp.493-512, 1996 (Released:2007-01-16)
- 参考文献数
- 12
- 被引用文献数
- 5 6
1 0 0 0 OA DIMENSIONS OF TACTUAL IMPRESSIONS (1)
- 著者
- MASAAKI YOSHIDA
- 出版者
- The Japanese Psychological Association
- 雑誌
- Japanese Psychological Research (ISSN:00215368)
- 巻号頁・発行日
- vol.10, no.3, pp.123-137, 1968 (Released:2009-02-24)
- 参考文献数
- 20
- 被引用文献数
- 8 62
In order to find out principal dimensions of touch, 50 samples of various texture, shape, size, and material, were collected.(1) Twenty haptic differential rating scales were applied to 50 samples and factor analyzed (S.D. touch).(2) Distance matrix constructed indirectly from the haptic profiles of 25 samples (selected from the 50) was analyzed by Torgerson-Indow's multi-dimensional scaling (MDS). Most important dimensions of tactual impressions are (i) heaviness and coldness (ii) wet and smoothness, and (iii) hardness. MDS yields nearly perfect one factor pattern. Metals and fibers are at the opposite poles.