WO_x-ZrO₂ (ZWx) based catalysts were prepared by equilibrium adsorption in basic condition (pH 10) with W content of 10.5, 19.7 and 27.0 wt.%, using hydrous zirconia [ZrO₂(383)] as support. In order to determine the soluble fraction of W species which did not interact with the surface, samples were leached with NH₃, dried and re-calcined [ZWx(NH₃)y]. The W content was determined by spectrophotometric method, before and after the leaching. All catalysts were characterized by textural analysis (BET), X-ray diffraction (XRD) and Raman spectroscopy; the acidic strength was determined by potentiometric titration with n-butylamine.

The catalytic behavior was analyzed for the selective oxidation of diphenyl sulfide (DPS) to diphenyl sulfoxide (DPSO) or diphenyl sulfone (DPSO₂) using H₂O₂ as oxidizing agent. High conversion of DPS (∼100%) and selectivity to DPSO₂ (>90%) at 60 min of reaction time were obtained for the ZWx series of catalysts. The ZWx(NH₃)y series (W content: 3.65, 6.50 and 7.50 wt.%, respectively) also showed high selectivity to diphenyl sulfone but the maximum conversion (∼100%) was achieved with reaction times longer (30 min) than those of the ZWx (10 min) samples.

Polytungstate species strongly interacting with the support, identified by Raman spectroscopy in both series of samples, are considered the active phases.

以含水氧化锆[ZrO ₂（383）]为载体，通过在碱性条件（pH 10）下平衡吸附制备WO _x -ZrO ₂（ZWx）基催化剂，其中W含量为10.5、19.7和27.0 wt。％。为了确定不与表面相互作用的W物种的可溶部分，将样品用NH ₃浸出，干燥并重新煅烧[ZWx（NH ₃）y]。在浸出之前和之后，通过分光光度法测定W含量。所有催化剂均通过组织分析（BET），X射线衍射（XRD）和拉曼光谱进行表征。用正丁胺通过电位滴定法测定酸强度。

使用H ₂ O ₂作为氧化剂，分析了二苯硫醚（DPS）选择性氧化为二苯亚砜（DPSO）或二苯砜（DPSO ₂）的催化行为。对于ZWx系列催化剂，在60分钟的反应时间内DPS的转化率高（约100％），对DPSO _2的选择性高（> 90％）。ZWx（NH ₃）y系列（W含量分别为3.65、6.50和7.50 wt。％）也显示出对二苯砜的高选择性，但在比反应时间长（30分钟）的条件下获得了最大转化率（〜100％）。 ZWx（10分钟）样本的那些。

在两个系列的样品中通过拉曼光谱法鉴定出的与支持物强烈相互作用的多钨酸盐物质被认为是活性相。