Xuemei Wang, Shiquan Huang, Fanjun Luo, Qing Liu, Gang Feng, Rongbin Zhang, Runping Ye
Cr-modified Ni/ZrO2 catalysts prepared by a sol-gel method exhibit exceptional low-temperature CO2 methanation activity. The optimal Ni/1.0CrZrOx catalyst achieves 78.0% CO2 conversion and nearly 100% CH4 selectivity at 180 °C. This stems from enriched oxygen vacancies and medium-strength basic sites that accelerate formate hydrogenation.