Manganese oxides supported on gold nanoparticles: New findings and current controversies for the role of gold

Mohammad Mahdi Najafpour, Seyedeh Maedeh Hosseini, Małgorzata Hołyńska, Tatsuya Tomo, Suleyman I. Allakhverdiev

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We synthesized manganese oxides supported on gold nanoparticles (diameter <100 nm) by the reaction of KMnO4 with gold nanoparticles under hydrothermal conditions. In this green method Mn oxide is deposited on the gold nanoparticles. The compounds were characterized by scanning electron microscopy, energy-dispersive spectrometry, high-resolution transmission electron microscopy, X-ray diffraction, UV-Vis spectroscopy, Fourier transform infrared spectroscopy, and atomic absorption spectroscopy. In the next step, the water-oxidizing activities of these compounds in the presence of cerium(IV) ammonium nitrate as a non-oxo transfer oxidant were studied. The results show that these compounds are good catalysts toward water oxidation with a turnover frequency of 1.0 ± 0.1 (mmol O2/(mol Mn·s)). A comparison with other previously reported Mn oxides and important factors influencing the water-oxidizing activities of Mn oxides is also discussed.

Original languageEnglish
Pages (from-to)477-487
Number of pages11
JournalPhotosynthesis research
Volume126
Issue number2-3
DOIs
Publication statusPublished - Dec 1 2015

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Keywords

  • Catalyst
  • Gold nanoparticles
  • Heterogeneous
  • Manganese oxide
  • Water oxidation

ASJC Scopus subject areas

  • Biochemistry
  • Plant Science
  • Cell Biology

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