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 I.
N1 - Funding Information:
MMN and SMH are grateful to the Institute for Advanced Studies in Basic Sciences and the National Elite Foundation for financial support. MH acknowledges Prof. Dr. S. Dehnen for generous support. This work was supported by Grant-in-Aids for Scientific Research from the Ministry of Education of Japan (24370025 and 26220801) to TT. SIA was supported by grants from the Russian Foundation for Basic Research (Nos: 14-04-01549, 14-04-92690) and by Molecular and Cell Biology Programs of the Russian Academy of Sciences.
Publisher Copyright:
© 2015 Springer Science+Business Media Dordrecht.
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
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U2 - 10.1007/s11120-015-0164-3
DO - 10.1007/s11120-015-0164-3
M3 - Article
C2 - 26076756
AN - SCOPUS:84942827153
SN - 0166-8595
VL - 126
SP - 477
EP - 487
JO - Photosynthesis research
JF - Photosynthesis research
IS - 2-3
ER -