Synthesis of tunnel-structured MnO₂ with one-dimensional morphologies (α-MnO₂ nanowires and β-MnO₂ nanorods) is reported, which is based on the hydrothermal transformation of layer-structured MnO₂ with two-dimensional morphology (δ-MnO₂ nanosheets) via altering the reaction conditions readily. The types of the anions (SO₄^2- and Cl^-) in the acid solution play critical roles in determining the crystalline structures of the final products. Both of the MnO₂ samples were characterized by means of XRD, Raman, FESEM, TEM, BET, XPS and H₂-TPR techniques. Owning to its more abundant surface adsorbed oxygen species, stronger reducibility, larger specific surface area and lower Mn-O bond strength, the α-MnO₂ nanowires showed enhanced catalytic performance in the dimethyl ether catalytic combustion (T₁₀ = 200 °C and T₉₀ = 274 °C at WHSV = 30, 000 mL g⁻¹ h⁻¹), which was much higher than the β-MnO₂ nanorods.

隧道结构的MnO的合成₂用一维形态（α-MnO的_2个纳米线和β-MnO的_2个纳米棒）报道，其基于的水热转化层结构的MnO ₂与二维形态（δ-MnO的₂纳米片）即可轻松更改反应条件。类型的阴离子（SO的₄ ^2-和Cl ^- ）在酸溶液中在确定最终产物的晶体结构中发挥关键作用。两种MnO ₂样品均通过XRD，拉曼，FESEM，TEM，BET，XPS和H ₂表征。-TPR技术。鉴于它的更丰富的表面吸附氧物种，更强的还原性，较大的比表面积和降低的MnO的粘结强度，α-MnO的₂纳米线表现出增强的在二甲醚催化燃烧的催化性能（Ť ₁₀ = 200  ℃，Ť ₉₀ = 274  ℃，在WHSV = 30，000 毫升 克^-1 ħ ^-1），其比β-MnO的高得多的₂纳米棒。