The Ni/ZrO₂ catalyst, with inexpensive price, high activity and excellent thermostability, has been widely investigated for dry reforming of methane (DRM). However, the stability of the catalyst still remains challenging due to the inevitable Ni sintering and carbon deposition under the high-temperature operation. Herein, the effects of the ZrO₂ phase engineering in the Ni/ZrO₂ catalyst on the DRM performance are highlighted. The characterization results reveal that the rising precipitated temperature can improve the tetragonal ratio (v_t) in the catalysts using KOH as the precipitant and the catalyst with higher v_t can be obtained via employing Na₂CO₃ or NaOH as the precipitant. The increased v_t might be caused by the increased Ni content inserted into the ZrO₂ support lattice. Ni dispersion is promoted with the raised v_t resulting from the enhanced metal-support interaction. Besides, stronger acidity-basicity and more defects, including Zr³⁺ and surface oxygen species, are also detected on the catalyst with higher v_t. Thus, the activity and stability over the Ni/ZrO₂ catalysts displays a positive relation with the v_t value. Especially, the conversions of CH₄ and CO₂ over the catalyst precipitated at 80 °C with NaOH as the precipitant are 80% ∼ 62% and 85% ∼ 72%, respectively, after evaluated for 3600 min with 4.3% carbon deposition. It has also been identified that the tetragonal ZrO₂ plays a vital role in restraining carbon accumulation and graphitization. Furthermore, the infrared spectroscopy experiments illustrate that the reactive oxygen species are richer on the catalyst with higher v_t and easier to react with CH₄.

Ni/ZrO ₂催化剂价格低廉、活性高、热稳定性好，在甲烷干重整（DRM）领域得到广泛研究。然而，由于高温操作下不可避免的Ni烧结和积碳，催化剂的稳定性仍然存在挑战。在此，强调了Ni/ZrO _{2催化剂中 ZrO 2}相工程对 DRM 性能的影响。表征结果表明，升高沉淀温度可以提高以KOH为沉淀剂的催化剂的四方晶系比(v _{t )，使用Na 2} CO ₃可以获得更高的v _t催化剂或 NaOH 作为沉淀剂。增加的 v _{t可能是由于插入到 ZrO 2}支撑晶格中的增加的 Ni 含量引起的。金属-载体相互作用增强导致v _t升高，从而促进了 Ni 分散。_{此外，在具有较高v t 的}催化剂上还检测到更强的酸碱性和更多的缺陷，包括Zr ³⁺和表面氧物种。_{因此，Ni/ZrO 2}催化剂的活性和稳定性与v _t值呈正相关。_{特别是 CH 4}和 CO ₂的转化在 80 °C 下以 NaOH 为沉淀剂沉淀的催化剂，在评估 3600 分钟和 4.3% 碳沉积后分别为 80% ∼ 62% 和 85% ∼ 72%。还发现四方ZrO ₂在抑制碳积累和石墨化方面起着至关重要的作用。_{此外，红外光谱实验表明，v t}较高的催化剂上的活性氧更丰富，更容易与CH ₄反应。