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Issue 34, 2015
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An engineered polypeptide around nano-sized manganese–calcium oxide: copying plants for water oxidation

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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.

Graphical abstract: An engineered polypeptide around nano-sized manganese–calcium oxide: copying plants for water oxidation

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Supplementary files

Article information


Submitted
16 Apr 2015
Accepted
14 May 2015
First published
14 May 2015

Dalton Trans., 2015,44, 15271-15278
Article type
Paper
Author version available

An engineered polypeptide around nano-sized manganese–calcium oxide: copying plants for water oxidation

M. M. Najafpour, M. Z. Ghobadi, B. Sarvi and B. Haghighi, Dalton Trans., 2015, 44, 15271
DOI: 10.1039/C5DT01443C

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