Solvothermal synthesis of 1D nanostructured Mn₂O₃: effect of Ni²⁺ and Co²⁺ substitution on the catalytic activity of nanowires
2015
Niu, Xiaoran | Wai, Wai-ying | Tang, Ke | Liu, Wei | Zhao, Genyuan | Yang, Yanzhao
In this paper, cation modified one dimensional Mn₂O₃ nanowires were synthesized via a solvothermal synthesis and calcination free from the template-assisted method. The samples were characterized in detail by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy, high resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS). XRD results revealed the homogeneity of Ni–Mn–O/Co–Mn–O solid solutions. By introducing the two different cations the Mn₂O₃ nanowires can be freely manipulated. The H₂-TPR measurement showed the enhanced reduction behaviors of the doped manganese oxide (Mn₂O₃) samples. The presence of Ni²⁺ and Co²⁺ produced lattice defects and promoted the production of oxygen vacancies, which explained the results that Ni²⁺/Co²⁺ doped Mn₂O₃ showed higher catalytic activity than the pure sample.
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