Hydrated manganese(II) phosphate (Mn3(PO4) 2·3H2O) as a water oxidation catalyst

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

Research output: Contribution to journalArticlepeer-review

235 Citations (Scopus)

Abstract

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) 2·3H2O, 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)2·3H 2O. Computational analysis indicated that the structural flexibility in Mn3(PO4)2·3H2O could stabilize the Jahn-Teller-distorted Mn(III) and thus facilitate Mn(II) oxidation. This study provides valuable insights into the interplay between atomic structure and catalytic activity.

Original languageEnglish
Pages (from-to)7435-7443
Number of pages9
JournalJournal of the American Chemical Society
Volume136
Issue number20
DOIs
Publication statusPublished - 2014 May 21
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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