| Budget Amount *help |
¥11,180,000 (Direct Cost: ¥8,600,000、Indirect Cost: ¥2,580,000)
Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2015: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2014: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
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| Outline of Final Research Achievements |
Based on the new hypothesis that the difference in the stability of Mn3+ between biological and artificial Mn catalysts is the origin for the activity difference, we have attempted to design the efficient catalysts for water oxidation under neutral pH. It was demonstrated that the induction of coupled electron-proton transfer is effective strategy to stabilize Mn3+, leading to the large enhancement of the activity. It was also demonstrated that the exposure of metastable faces of and lowering the size of Mn catalysts stabilize Mn3+, thus enhancing the activity. Furthermore, by comparing the mechanisms of novel-metal catalysts, we have successfully generalize our concept of Mn3+, highlighting that the spin state regulation of intermediates is critical to generate next-generation O2 evolution catalysts with abundant 3d-block elements.
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