Journal ArticleDOI
Effect of Phase Structure of MnO2 Nanorod Catalyst on the Activity for CO Oxidation
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TLDR
In this paper, the catalytic properties of the α-, β-, γ-, and δ-MnO2 nanorods were evaluated for CO oxidation, and the effects of phase structures on the catalysts were investigated.Abstract:
The α-, β-, γ-, and δ-MnO2 nanorods were synthesized by the hydrothermal method. Their catalytic properties for CO oxidation were evaluated, and the effects of phase structures on the activities of the MnO2 nanorods were investigated. The activities of the catalysts decreased in the order of α- ≈ δ- > γ- > β-MnO2. The mechanism of CO oxidation over the MnO2 nanorods was suggested as follows. The adsorbed CO was oxidized by the lattice oxygen, and the MnO2 nanorods were partly reduced to Mn2O3 and Mn3O4. Then, Mn2O3 and Mn3O4 were oxidized to MnO2 by gaseous oxygen. CO chemisorption, the Mn−O bond strength of the MnO2, and the transformation of intermediate oxides Mn2O3 and Mn3O4 into MnO2 can significantly influence the activity of the MnO2 nanorods. The activity for CO oxidation was mainly predominated by the crystal phase and channel structure of the MnO2 nanorods.read more
Citations
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Journal ArticleDOI
Catalytic Oxidation of Carbon Monoxide over Transition Metal Oxides
Sébastien Royer,Daniel Duprez +1 more
TL;DR: In this article, the kinetics and mechanism of CO oxidation on single and mixed oxides are examined, alongside the catalyst structures, in a review of the literature on carbon monoxide over oxide catalysts.
Journal ArticleDOI
Nonstoichiometric Oxides as Low-Cost and Highly-Efficient Oxygen Reduction/Evolution Catalysts for Low-Temperature Electrochemical Devices
TL;DR: Reduction/Evolution Catalysts for Low-Temperature Electrochemical Devices Dengjie Chen, ⊥,∇ Chi Chen,†,⊥ Zarah Medina Baiyee,‡,§ and Francesco Ciucci*,†.
Journal ArticleDOI
Manganese Oxides with Rod-, Wire-, Tube-, and Flower-Like Morphologies: Highly Effective Catalysts for the Removal of Toluene
TL;DR: The excellent catalytic performance of α-MnO(2) nanorods might be associated with the high oxygen adspecies concentration and good low-temperature reducibility and it is sure that one-dimensional well-defined morphological manganese oxides are promising materials for the catalytic elimination of air pollutants.
Journal ArticleDOI
Recent advances in heterogeneous selective oxidation catalysis for sustainable chemistry
TL;DR: Recent advances in the development of new catalytic materials or novel catalytic systems for challenging oxidation reactions, which are important from the viewpoint of green and sustainable chemistry and still remain challenging, are summarized.
Journal ArticleDOI
Shape-controlled synthesis of MnO2 nanostructures with enhanced electrocatalytic activity for oxygen reduction
TL;DR: In this paper, three types of MnO2 nanostructures, viz., microsphere/nanosheet core−corona hierarchical architectures, one-dimensional (1D) nanorods, and nanotubes, have been synthesized employing a simple hydrothermal process.
References
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Journal ArticleDOI
Enhanced catalytic activity of ceria nanorods from well-defined reactive crystal planes
TL;DR: In this paper, single-crystalline CeO2 nanorods with well-defined crystal planes have been synthesized by a facile solution-based hydrothermal method.
Journal ArticleDOI
Selected-Control Hydrothermal Synthesis of α- and β-MnO2 Single Crystal Nanowires
TL;DR: In this article, a selective control hydrothermal method has been developed in the preparation of α- and β-MnO2 single-crystal nanowires, which can be influenced by the concentration of NH4+ and SO42-.
Journal ArticleDOI
Hydrothermal synthesis and pseudocapacitance properties of MnO2 nanostructures.
TL;DR: Interestingly, SEM, TEM, and HRTEM revealed a variety of structures ranging from nanostructured surface with a distinct platelike morphology to nanorod depending upon the hydrothermal reaction time employed during the preparation of the manganese oxide: increasing the amount of individual nanorods in the materials prepared with longer hydrother mal reaction time.
Journal ArticleDOI
MnOx-CeO2 mixed oxide catalysts for complete oxidation of formaldehyde: Effect of preparation method and calcination temperature
TL;DR: In this paper, the effect of calcination temperature on the structural features and catalytic behavior of the MnO x -CeO 2 mixed oxides prepared by modified coprecipitation was further examined, and the catalyst calcined at 773 K showed 100% formaldehyde conversion at a temperature as low as 373 K.
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