Solvothermal synthesis of 1D nanostructured Mn₂O₃: effect of Ni²⁺ and Co²⁺ substitution on the catalytic activity of nanowires

Abstract

In this paper, cation modified one dimensional Mn 2 O 3 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 Mn 2 O 3 nanowires can be freely manipulated. The H 2 -TPR measurement showed the enhanced reduction behaviors of the doped manganese oxide (Mn 2 O 3 ) samples. The presence of Ni 2+ and Co 2+ produced lattice defects and promoted the production of oxygen vacancies, which explained the results that Ni 2+ /Co 2+ doped Mn 2 O 3 showed higher catalytic activity than the pure sample. † Electronic supplementary information (ESI) available: The surface areas and the compositional data of the as prepared Mn 2 O 3 samples. SEM and XRD of Ni-doped Mn 2 O 3 and Co-doped Mn 2 O 3 nanowires aer catalysis for 6 times. Catalytic performance of pure Mn 2 O 3 nanowires in different runs. SeeFig. 10 Catalytic performance of Co-doped Mn 2 O 3 (a) and Ni-doped Mn 2 O 3 (b) in different runs. 66276 | RSC Adv., 2015, 5, 66271-66277 This journal is

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