An engineered polypeptide around nano-sized manganese–calcium oxide: copying plants for water oxidation. Issue 34 (28th May 2015)

• Record Type: Journal Article
• Authors: Najafpour, Mohammad Mahdi; Ghobadi, Mohadeseh Zarei; Sarvi, Bahram; Haghighi, Behzad
• Is Part Of: Dalton transactions. Volume 44:Issue 34(2015)
• Page Start: 15271
• Page End: 15278
• Publication Date: 2015-05-28
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c5dt01443c
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Herein, we introduce a novel engineered polypeptide containing tyrosine around a nano-sized manganese–calcium oxide, which was shown to be a highly active catalyst toward water oxidation at low overpotential. Abstract : Synthesis of new efficient catalysts inspired by Nature is a key goal in the production of clean fuel. Different compounds based on manganese oxide have been investigated in order to find their water-oxidation activity. Herein, we introduce a novel engineered polypeptide containing tyrosine around nano-sized manganese–calcium oxide, which was shown to be a highly active catalyst toward water oxidation at low overpotential (240 mV), with high turnover frequency of 1.5 × 10 −2 s −1 at pH = 6.3 in the Mn(iii )/Mn(iv ) oxidation range. The compound is a novel structural and efficient functional model for the water-oxidizing complex in Photosystem II. A new proposed clever strategy used by Nature in water oxidation is also discussed. The new model of the water-oxidizing complex opens a new perspective for synthesis of efficient water-oxidation catalysts.