This work presents a facile and efficient approach to modulate morphology and textural properties of ZrO₂ through ammonium fluoride-urea assisted hydrothermal (FUAH) method with diverse parameters including molar ratio of NH₄F to zirconium (n_f/z), molar ratio of urea to zirconium (n_u/z), hydrothermal temperature (T_hydroth), and hydrothermal time (t_hydroth), which serve as support for supported Ni catalysts towards dry reforming of methane (DRM) to produce synthesis gas. The plausible mechanism for forming ZrO₂ supports with different morphologies under diverse hydrothermal conditions was proposed. Various characterization techniques were employed to investigate the effect of preparation parameters on the morphology and textural properties of the as-synthesized ZrO₂ supports, as well as to reveal the structure-performance relationship of the Ni/ZrO₂ catalysts prepared by L-arginine assisted incipient wetness impregnation method towards DRM reaction. The developed supported Ni catalyst on hierarchically structured ZrO₂ with pinecone shape prepared by FUAH method (Ni/ZrO₂-FUAH) demonstrates higher activity and stability for DRM than that on ZrO₂ prepared by traditional hydrothermal method (Ni/ZrO₂-H). The higher activity of Ni/ZrO₂-FUAH than Ni/ZrO₂-H can be ascribed to the higher Ni dispersion, smaller Ni crystalline size, and enhanced reducibility of NiO, significantly affected by morphology of support, as well as the higher

中文翻译：

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ZrO2负载Ni催化剂对甲烷干重整的形貌和结构性能的调控。

这项工作提出了一种简便有效的方法，可通过氟化铵-尿素辅助水热法（FUAH）调节ZrO _2的形态和织构特性，该方法具有多种参数，包括NH ₄ F与锆的摩尔比（n _{f / z}），尿素转变为锆（n _{u / z}），水热温度（T _hydroth）和水热时间（t _hydroth），为负载型Ni催化剂进行甲烷干重整以生产合成气提供了支持。形成ZrO ₂的合理机制提出了在不同的热液条件下具有不同形态的支撑体。采用多种表征技术研究了制备参数对合成的ZrO ₂载体的形貌和织构性质的影响，并揭示了L-精氨酸辅助制备的Ni / ZrO ₂催化剂的结构-性能关系。初湿浸渍法对DRM反应的影响 所开发的负载的Ni催化剂上分层结构化的ZrO ₂与松果形状制备FUAH方法（镍/的ZrO ₂ -FUAH）演示了用于DRM比在ZrO2上较高的活性和稳定性₂通过传统水热法制备（镍/的ZrO ₂-H）。Ni / ZrO ₂ -FUAH的活性高于Ni / ZrO ₂ -H可以归因于较高的Ni分散度，较小的Ni晶体尺寸和增强的NiO还原性，这受载体形态的显着影响以及更高