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 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
Externally publishedYes

Fingerprint

manganese oxides
Gold
Nanoparticles
Oxides
gold
Spectrum Analysis
Water
Atomic spectroscopy
Fourier Transform Infrared Spectroscopy
High resolution transmission electron microscopy
Ultraviolet spectroscopy
Transmission Electron Microscopy
Absorption spectroscopy
Oxidants
X-Ray Diffraction
ultraviolet-visible spectroscopy
Electron Scanning Microscopy
Spectrometry
water
atomic absorption spectrometry

Keywords

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

ASJC Scopus subject areas

  • Biochemistry
  • Plant Science
  • Cell Biology

Cite this

Manganese oxides supported on gold nanoparticles : New findings and current controversies for the role of gold. / Najafpour, Mohammad Mahdi; Hosseini, Seyedeh Maedeh; Hołyńska, Małgorzata; Tomo, Tatsuya; Allakhverdiev, Suleyman.

In: Photosynthesis Research, Vol. 126, No. 2-3, 01.12.2015, p. 477-487.

Research output: Contribution to journalArticle

Najafpour, Mohammad Mahdi ; Hosseini, Seyedeh Maedeh ; Hołyńska, Małgorzata ; Tomo, Tatsuya ; Allakhverdiev, Suleyman. / Manganese oxides supported on gold nanoparticles : New findings and current controversies for the role of gold. In: Photosynthesis Research. 2015 ; Vol. 126, No. 2-3. pp. 477-487.
@article{bd9d99e29bcf42b88d8a0ba4d9b77e04,
title = "Manganese oxides supported on gold nanoparticles: New findings and current controversies for the role of gold",
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.",
keywords = "Catalyst, Gold nanoparticles, Heterogeneous, Manganese oxide, Water oxidation",
author = "Najafpour, {Mohammad Mahdi} and Hosseini, {Seyedeh Maedeh} and Małgorzata Hołyńska and Tatsuya Tomo and Suleyman Allakhverdiev",
year = "2015",
month = "12",
day = "1",
doi = "10.1007/s11120-015-0164-3",
language = "English",
volume = "126",
pages = "477--487",
journal = "Photosynthesis Research",
issn = "0166-8595",
publisher = "Springer Netherlands",
number = "2-3",

}

TY - JOUR

T1 - Manganese oxides supported on gold nanoparticles

T2 - New findings and current controversies for the role of gold

AU - Najafpour, Mohammad Mahdi

AU - Hosseini, Seyedeh Maedeh

AU - Hołyńska, Małgorzata

AU - Tomo, Tatsuya

AU - Allakhverdiev, Suleyman

PY - 2015/12/1

Y1 - 2015/12/1

N2 - 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.

AB - 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.

KW - Catalyst

KW - Gold nanoparticles

KW - Heterogeneous

KW - Manganese oxide

KW - Water oxidation

UR - http://www.scopus.com/inward/record.url?scp=84942827153&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84942827153&partnerID=8YFLogxK

U2 - 10.1007/s11120-015-0164-3

DO - 10.1007/s11120-015-0164-3

M3 - Article

VL - 126

SP - 477

EP - 487

JO - Photosynthesis Research

JF - Photosynthesis Research

SN - 0166-8595

IS - 2-3

ER -