Hydrated Manganese(II) Phosphate (Mn3(PO4)2路3H2O) as a Water Oxidation Catalyst

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• 作者：Kyoungsuk Jin ; Jimin Park ; Joohee Lee ; Ki Dong Yang ; Gajendra Kumar Pradhan ; Uk Sim ; Donghyuk Jeong ; Hae Lin Jang ; Sangbaek Park ; Donghun Kim ; Nark-Eon Sung ; Sun Hee Kim ; Seungwu Han ; Ki Tae Nam
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：May 21, 2014
• 年：2014
• 卷：136
• 期：20
• 页码：7435-7443
• 全文大小：521K
• 年卷期：v.136,no.20(May 21, 2014)
• ISSN：1520-5126

文摘

The development of a water oxidation catalyst has been a demanding challenge in realizing water splitting systems. The asymmetric geometry and flexible ligation of the biological Mn₄CaO₅ cluster are important properties for the function of photosystem II, and these properties can be applied to the design of new inorganic water oxidation catalysts. We identified a new crystal structure, Mn₃(PO₄)₂路3H₂O, that precipitates spontaneously in aqueous solution at room temperature and demonstrated its high catalytic performance under neutral conditions. The bulky phosphate polyhedron induces a less-ordered Mn geometry in Mn₃(PO₄)₂路3H₂O. Computational analysis indicated that the structural flexibility in Mn₃(PO₄)₂路3H₂O could stabilize the Jahn鈥揟eller-distorted Mn(III) and thus facilitate Mn(II) oxidation. This study provides valuable insights into the interplay between atomic structure and catalytic activity.