Toward Escherichia coli bacteria machine for water oxidation

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

Research output: Contribution to journalArticle

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
Externally publishedYes

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Keywords

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

ASJC Scopus subject areas

  • Biochemistry
  • Plant Science
  • Cell Biology

Cite this

Najafpour, M. M., Moghaddam, N. J., Hassani, L., Bagheri, R., Song, Z., & Allakhverdiev, S. (2018). Toward Escherichia coli bacteria machine for water oxidation. Photosynthesis Research, 136(2), 257-267. https://doi.org/10.1007/s11120-018-0499-7