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Promotion Of H2O2 Decomposition Activity Over β-MnO2 Nanorod Catalysts

W. Zhang, H. Wang, Z. Yang, F. Wang
Published 2007 · Chemistry

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Abstract The relationship among the β-MnO2 nanorod preparation conditions, morphology and catalytic performance on H2O2 decomposition has been investigated in the work. β-MnO2 nanorod catalysts were prepared by heating different γ-MnOOH nanorod precursors at 250–450 °C. They were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and nitrogen adsorption. The experimental results indicate that γ-MnOOH nanorod precursors prepared at higher hydrothermal temperature make final β-MnO2 nanorods uniform. The catalytic performance on H2O2 decomposition shows that β-MnO2 nanorod catalysts have excellent catalytic activity on the decomposition of H2O2, which has not been reported to our knowledge. β-MnO2 nanorods which were prepared by calcining γ-MnOOH precursors at 250 °C have higher catalytic activity than those at higher calcination temperatures. The reaction of H2O2 decomposition over β-MnO2 nanorod catalysts was found to follow first-order kinetics.
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