Hydrogen peroxide decomposition over Ln1−xAxMnO3 (Ln = La or Nd and A = K or Sr) perovskites

Lee, Yolanda Ng; Lago, Rochel M.; Fierro, J.L.G.; González, J.

doi:10.1016/s0926-860x(01)00536-1

Cited by 117 publications

(54 citation statements)

References 36 publications

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“…These results suggested that H 2 O 2 decomposition in Na-OL-1/H 2 O 2 suspension took place by two possible reaction pathways: (1) the surface oxygen vacancies mechanism and (2) the radicalar mechanism. The same mechanism has been reported in the previous work [43]. In addition, in Na-OL-1 suspension under oxygen atmosphere, H 2 O 2 was also generated and its concentration increased significantly with the addition amount of Na-OL-1 (Fig.…”

Section: Reaction Mechanismsupporting

confidence: 84%

“…Since dissolved oxygen was responsible for the generation of singlet oxygen [44], singlet oxygen was then most likely generated from the reaction between Na-OL-1 and the nascent oxygen, other than H 2 O 2 . In light of the experimental data and a review of the literature [43], both H 2 O 2 decomposition pathways were proposed in the Na-OL-1 suspension. …”

Section: Reaction Mechanismmentioning

confidence: 99%

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Decolorization of methylene blue in layered manganese oxide suspension with H2O2

Zhang

Nie

et al. 2011

Journal of Hazardous Materials

122

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a b s t r a c tLayered birnessite-type manganese oxides (Na-OL-1) were prepared via a redox reaction involving MnO 4 − and Mn 2+ under markedly alkaline conditions. According to the XRD analysis, the resulting material exhibited a well-crystallized octahedral layer (OL) structure with several different phases, including ␤-MnOOH, ␣-MnOOH and ␥-Mn 3 O 4 . The catalyst was highly effective for the decolorization and degradation of methylene blue (MB) in the presence of H 2 O 2 at neutral pH. The tested MB was completely decolorized in Na-OL-1 suspension by the fraction dosing of H 2 O 2 (556.5 mM at the beginning and then 183.8 mM at 40 min). Based on the studies of electron spin resonance and the effect of radical scavengers, the 1 O 2 and O 2 •− were the main reactive oxygen species (ROS) in the reaction. It was found that both oxygen and ROS were generated from the decomposition of H 2 O 2 in Na-OL-1 suspension, wherein the decomposition pathways were proposed. The generation of H 2 O 2 in Na-OL-1 suspension at air atmosphere indicated that the existence of multivalent manganese oxides greatly enhanced the interfacial electron transfer, leading to the high activity of Na-OL-1.

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Section: Reaction Mechanismsupporting

confidence: 84%

Section: Reaction Mechanismmentioning

confidence: 99%

Decolorization of methylene blue in layered manganese oxide suspension with H2O2

Zhang

Nie

et al. 2011

Journal of Hazardous Materials

122

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“…LaMnO 3 shows good stability, flexible oxygen stoichiometry (δ) and the different Mn oxidation states i.e., Mn 2+ , Mn 3+ , Mn 4+ , which strongly affects the catalytic behavior. Also, isomorphic substitution of metals in the perovskite structure allows some control the catalytic properties of the material and its several derivatives have been previously investigated [15,16]. Lanthanum-based perovskites containing transition metal in B-site, (LaBO 3 , B=Co, Fe, Ni or Mn), show catalytic activity close to the noble metal, presenting low cost and high thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Lamn1-XFexO3 (X=0, 0.1, 0.2) by Coprecipitation Route

Geetha¹,

Kumar²,

Prakash³

2018

J Phys Chem Biophys

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“…La 1-x A x Mn 1-y M y O 3 (where A is a lanthanide, actinide, alkaline or earth alkaline metal and M is another transition metal such as Co, Ni, etc.) have been previously investigated 13,14 .…”

Section: Introductionmentioning

confidence: 99%

LaMn1-xFe xO3 and LaMn0.1-xFe0.90Mo x O3 perovskites: synthesis, characterization and catalytic activity in H2O2 reactions

et al. 2008

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In this work two perovskites were prepared: LaMn 1-x Fe x O 3 , and LaMn 0.1-x Fe 0.90 Mo x O 3 . XRD and Mössbauer spectroscopy suggest the formation of pure phase perovskite with the incorporation of Fe and Mo in the structure. The catalytic activity of these materials was studied in two reactions with H 2 O 2 : the decomposition to O 2 , and the oxidation of the model organic contaminant methylene blue. The perovskite composition strongly affects the catalytic activity, while Fe decreases the H 2 O 2 decomposition Mo strongly improves dye oxidation.

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Hydrogen peroxide decomposition over Ln1−xAxMnO3 (Ln = La or Nd and A = K or Sr) perovskites

Cited by 117 publications

References 36 publications

Decolorization of methylene blue in layered manganese oxide suspension with H2O2

Decolorization of methylene blue in layered manganese oxide suspension with H2O2

Synthesis and Characterization of Lamn1-XFexO3 (X=0, 0.1, 0.2) by Coprecipitation Route

LaMn1-xFe xO3 and LaMn0.1-xFe0.90Mo x O3 perovskites: synthesis, characterization and catalytic activity in H2O2 reactions

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