Toward Escherichia coli bacteria machine for water oxidation

Mohammad Mahdi Najafpour, Navid Jameei Moghaddam, Leila Hassani, Robabeh Bagheri, Zhenlun Song, Suleyman I. Allakhverdiev

    Research output: Contribution to journalArticlepeer-review

    1 Citation (Scopus)

    Abstract

    Nature uses a Mn oxide-based catalyst for water oxidation in plants, algae, and cyanobacteria. Mn oxides are among major candidates to be used as water-oxidizing catalysts. Herein, we used two straightforward and promising methods to form Escherichia coli bacteria/Mn oxide compounds. In one of the methods, the bacteria template was intact after the reaction. The catalysts were characterized by X-ray photoelectron spectroscopy, visible spectroscopy, scanning electron microscopy, high-resolution transmission electron microscopy, diffuse reflectance infrared Fourier transform spectroscopy, Raman spectroscopy, and X-ray diffraction spectrometry. Electrochemical properties of the catalysts were studied, and attributed redox potentials were assigned. The water oxidation of the compounds was examined under electrochemical condition. Linear sweep voltammetry showed that the onsets of water oxidation in our experimental condition for bacteria and Escherichia coli bacteria/Mn oxide were 1.68 and 1.56 V versus the normal hydrogen electrode (NHE), respectively. Thus, the presence of Mn oxide in the catalyst significantly decreased (~ 120 mV) the overpotential needed for water oxidation.

    Original languageEnglish
    Pages (from-to)257-267
    Number of pages11
    JournalPhotosynthesis research
    Volume136
    Issue number2
    DOIs
    Publication statusPublished - May 1 2018

    Keywords

    • Bacteria
    • Catalyst
    • Hydrogen
    • Manganese oxide
    • Water oxidation

    ASJC Scopus subject areas

    • Biochemistry
    • Plant Science
    • Cell Biology

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