ZnO/TiO₂ catalysts, with different compositions, have been synthesized by wetness impregnation of TiO₂ in Zn(NO₃)₂ water solution and by precipitation of ZnCO₃ in the presence of TiO₂, characterized by X-ray diffraction and surface area measurements and tested in the methanol steam reforming reaction. The methanol conversion, the hydrogen yield and the CO selectivity were compared for composition, for synthesis methods and for surface area. The activity resulted proportional to the surface area for both kind of preparations. Precipitated catalyst had higher surface area. Nevertheless, impregnation method gave better performances, in term of methanol conversion, hydrogen yield and CO selectivity. XRD gave evidence of a more crystalline structure for impregnated catalysts than for precipitated ones. This higher crystallinity allows for better electronic interactions between ZnO and TiO₂, which is probably responsible for the better catalytic performance. Using GHVS_CH3OH = 5 × 10⁴ h⁻¹ impregnated catalyst with χ_Zn ≤ 0.22 reached methanol conversion completeness at T = 400 °C with CO selectivity = 2% and gave GHVS_H2 = 14.5 × 10⁴ h⁻¹ at 400 °C and 4.5 × 10⁴ h⁻¹ at 350 °C. CO selectivity resulted invariant with respect to methanol conversion, giving information about possible reaction pathway.

通过在 Zn(NO ₃ ) ₂水溶液中湿浸渍 TiO ₂和在 TiO ₂存在下沉淀 ZnCO ₃合成了具有不同组成的ZnO/TiO ₂催化剂，通过 X 射线衍射和表面积测量表征并在甲醇蒸汽重整反应中进行测试。比较甲醇转化率、氢气产率和 CO 选择性的组成、合成方法和表面积。两种制剂的活性与表面积成正比。沉淀的催化剂具有更高的表面积。然而，浸渍法在甲醇转化率、氢气产率和 CO 选择性方面表现更好。XRD 证明浸渍催化剂比沉淀催化剂具有更多的结晶结构。这种更高的结晶度允许 ZnO 和 TiO ₂之间更好的电子相互作用，这可能是更好的催化性能的原因。使用 GHVS _CH3OH = 5 × 10 ⁴  h ^-1 χ _Zn  ≤ 0.22 的浸渍催化剂在 T = 400 °C 下达到甲醇转化完全，CO 选择性 = 2% 并在 400 °C 和 4.5 × 下得到 GHVS _H2  = 14.5 × 10 ⁴  h ^-1 10 ⁴  h ^-1在 350 °C。CO 选择性导致甲醇转化率不变，提供有关可能的反应途径的信息。