The Ti-pillared clay-supported vanadia − ceria (yV4Ce/Ti-PILC, y was the V weight percentage (wt%), Ce weight percentage = 4 wt%) samples were prepared using the impregnation method. The catalytic activity for the selective catalytic reduction of NO_x with NH₃ (NH₃-SCR) decreased in the order of 1V4Ce/Ti-PILC > 4Ce/Ti-PILC > 2V4Ce/Ti-PILC > 1 V/Ti-PILC > 1V4Ce/Clay > Ti-PILC > Clay, with the 1V4Ce/Ti-PILC sample exhibiting the best activity (NO_x conversion >90% at 280–450 °C). Physiochemical properties of the samples were investigated by means of XRD, N₂ absorption-desorption, SEM, H₂-TPR, NH₃-TPD, XPS, and in situ DRIFT techniques. The vanadia was uniformly dispersed on the Ti-PILC support, while the ceria were mainly present in CeO₂. The Ti-pillared support was suitable for dispersing the V-Ce composite oxides. The strong interaction between vanadia and ceria led to increased H₂ consumption and high-temperature reduction. The Ce⁴⁺/Ce³⁺ and V⁵⁺/V⁴⁺ redox cycle (V⁴⁺ + Ce⁴⁺ ↔ V⁵⁺ + Ce³⁺) accounted for the excellent NH₃-SCR catalytic performance of the 1V4Ce/Ti-PILC sample. The doping of a proper amount of vanadia could promote formation of Ce³⁺ on the surface of 1V4Ce/Ti-PILC, and the formed Ce³⁺ could generate a more amount of the chemisorbed oxygen species that favored the NH₃-SCR reaction. Furthermore, the 1V4Ce/Ti-PILC sample possessed high catalytic acidity and strong NH₃ adsorption ability, which were responsible for high NO conversion in a wide range of temperatures. The NH₃-SCR reaction on the 4Ce/Ti-PILC and 1V4Ce/Ti-PILC samples obeyed the Langmuir–Hinshelwood (L–H) and Eley-Rideal (E–R) mechanisms, with the former being dominant.

使用浸渍法制备了Ti柱状粘土负载的钒-二氧化铈（y V4Ce / Ti-PILC，y为V的重量百分比（wt％），Ce的重量百分比= 4 wt％）样品。用于选择性催化还原的催化活性NO _X与NH ₃（NH ₃ -SCR）在1V4Ce / Ti系PILC> 4CE / Ti系PILC> 2V4Ce / Ti系PILC的顺序降低> 1个V / Ti系PILC> 1V4Ce /粘土>的Ti-PILC>黏土，与1V4Ce / Ti系PILC样品显示出最佳活性（NO _X转化率> 90％的在280-450℃）。通过XRD，N ₂吸收-解吸，SEM，H ₂ -TPR，NH ₃考察了样品的理化性质。-TPD，XPS和原位DRIFT技术。钒氧化物均匀地分散在Ti-PILC载体上，而二氧化铈主要存在于CeO _2中。Ti柱状载体适合于分散V-Ce复合氧化物。钒与二氧化铈之间的强相互作用导致H ₂消耗增加和高温降低。Ce的⁴⁺ / CE ³⁺和V ⁵⁺ / V ⁴⁺的氧化还原循环（V ⁴⁺  + Ce的⁴⁺  ↔V ⁵⁺  +的Ce ³⁺）占优良NH ₃的1V4Ce /钛-SCR催化性能-PILC样品。掺杂适量的钒可以促进铈的形成1V4Ce / Ti-PILC表面存在³⁺，而形成的Ce ³⁺可产生更多的化学吸附氧，有利于NH ₃ -SCR反应。此外，1V4Ce / Ti-PILC样品具有较高的催化酸度和较强的NH ₃吸附能力，这是在宽温度范围内实现高NO转化的原因。4Ce / Ti-PILC和1V4Ce / Ti-PILC样品上的NH ₃ -SCR反应服从Langmuir-Hinshelwood（L-H）和Eley-Rideal（E-R）机理，前者占主导地位。