Nanocage‐shaped Co_3−xZr_xO₄ solid‐solution supports and the corresponding platinum loaded nanocomposites, yPt/Co_3−xZr_xO₄ (x =0.27, 0.50, 0.69; y = 0.5, 1.0, 2.0 wt.%), are successfully fabricated via a Cu₂O nanocube hard template method and a glycol reduction method, respectively. The hollow nanocage structures obviously improve surface areas; moreover, the Zr doping forms the Co_3−xZr_xO₄ solid‐solution supports, and the corresponding yPt/Co_3−xZr_xO₄ catalysts promote the enhancement of catalytic performance. Catalytic activity toward toluene combustion is enhanced for the 2.0 wt% Pt/Co_2.73Zr_0.27O₄ catalyst. The catalysts are characterized using multiple techniques. Pt nanoparticles are uniformly dispersed across the Co_2.73Zr_0.27O₄ nanocage surface. The 2.0 wt% Pt/Co_2.73Zr_0.27O₄ catalyst exhibits the highest catalytic activity among all the samples and demonstrates good stability, with 90% toluene conversion obtained at a temperature of 165 °C. The same catalyst accomplishes full toluene oxidation at 180 °C, at a weight hourly space velocity of 36 000 mL h⁻¹ g⁻¹. The apparent activation energy (E_a) over the yPt/Co_2.73Zr_0.27O₄ samples are significantly lower than those over the Co_3−xZr_xO₄ supports, with the 2.0 wt% Pt/Co_2.73Zr_0.27O₄ catalyst exhibiting the lowest E_a value. These findings demonstrate the potential of the 2.0 wt% Pt/Co_2.73Zr_0.27O₄ catalyst as a promising catalyst toward atmospheric toluene removal.

中文翻译：

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纳米笼状的Co3-xZrxO4固溶体负载了Pt纳米颗粒作为增强甲苯氧化的有效催化剂

纳米笼状Co _{3− x} Zr _x O ₄固溶体载体和相应的负载铂的纳米复合材料y Pt / Co _{3− x} Zr _x O ₄（x  = 0.27，0.50，0.69; y = 0.5，1.0，2.0 wt分别通过Cu ₂ O纳米立方体硬模板法和二元醇还原法成功制备了。中空的纳米笼结构明显改善了表面积。此外，Zr掺杂形成Co _{3− x} Zr _x O ₄固溶体支持体，以及相应的y Pt / Co_{3- x} Zr _x O ₄催化剂促进催化性能的增强。对于2.0wt％的Pt / Co _2.73 Zr _0.27 O ₄催化剂，提高了对甲苯燃烧的催化活性。使用多种技术表征催化剂。Pt纳米颗粒均匀分布在Co _2.73 Zr _0.27 O ₄纳米笼表面上。2.0 wt％Pt / Co _2.73 Zr _0.27 O ₄催化剂在所有样品中均表现出最高的催化活性，并表现出良好的稳定性，在165°C的温度下可获得90％的甲苯转化率。相同的催化剂在180°C下以每小时36000 mL h ^-1 g ^-1的重时空速完成甲苯的完全氧化。表观活化能（Ë_一）在ÿ的Pt / Co _2.73 Zr的_0.27 Ò ₄样品比那些在共同显著降低_{3- X}的Zr _X Ò _4点支撑，用2.0重量％的Pt / Co _2.73 Zr的_0.27 Ò ₄催化剂具有最低的E _a值。这些发现证明了2.0重量％的Pt / Co _2.73 Zr _0.27 O ₄催化剂作为除去大气中甲苯的有前途的催化剂的潜力。