A series of TiO₂-supported Ru catalysts with different TiO₂ crystalline phases was synthesized and employed for the hydrogenolysis of polyethylene (PE). CO chemisorption, high-angle annular dark-field-scanning transmission electron microscopy, temperature-programmed reduction, and CO-Fourier transform infrared spectroscopy suggested that the degree of strong metal-support interactions (SMSIs) varied depending on the type of the TiO₂ phase and the reduction temperature, eventually influencing the catalysis of PE hydrogenolysis. Among the synthesized catalysts, Ru/TiO₂ with the rutile phase (Ru/TiO₂-R) exhibited the highest catalytic activity after high-temperature reduction at 500 °C, indicating that a certain degree of SMSI is necessary for ensuring high activity in PE hydrogenolysis. Ru/TiO₂-R could be successfully employed for the hydrogenolysis of post-consumer plastic wastes such as LDPE bottles to produce valuable chemicals (liquid fuel and wax) in high yields of 74.7%. This work demonstrates the possibility of harnessing the SMSIs in the design and synthesis of active catalysts for PE hydrogenolysis.

合成了一系列具有不同 TiO ₂晶相的 TiO 2 负载的 Ru 催化剂，并将其用于_聚乙烯(PE) 的氢解。CO 化学吸附、高角度环形暗场扫描透射电子显微镜、程序升温还原和 CO-傅立叶变换红外光谱表明，强金属-载体相互作用 (SMSI) 的程度因 TiO 2 的类型而_异相和还原温度，最终影响 PE 氢解的催化。在合成的催化剂中，具有金红石相的Ru/TiO _{2 (Ru/TiO 2}-R)在500℃高温还原后表现出最高的催化活性，表明一定程度的SMSI是保证PE氢解高活性所必需的。Ru/TiO ₂ -R 可成功用于消费后塑料废物（如 LDPE 瓶）的氢解，以生产有价值的化学品（液体燃料和蜡），产率为 74.7%。这项工作证明了在 PE 氢解活性催化剂的设计和合成中利用 SMSI 的可能性。