2026-10-12T11:43:40Z https://www.scidb.cn/oai

10.57760/sciencedb.38450 2026-05-29T17:44:47Z

2026-05-29 CeO2-Modified NiCuMgAl Mixed Metal Catalyst for Dry Reforming of Methane doi:10.57760/sciencedb.38450 en Dry reforming of methane (DRM) can simultaneously convert two greenhouse gases into syngas, offering both environmental and resource utilization benefits. However, this reaction still faces key challenges such as high energy consumption and catalyst deactivation due to carbon deposition and sintering. In this study, NiCuMgAl hydrotalcite precursors were prepared via the urea hydrothermal method, and cerium nitrate solutions of different concentrations were introduced by impregnation. After calcination and reduction, a series of NiCuMgAl catalysts with CeO2 loadings of 5%, 10%, 15%, and 20% were obtained. The effects of CeO2 content on the catalyst structure, surface properties, and DRM performance were systematically investigated. The catalysts were characterized by XRD, BET, SEM, TEM, XPS, CO2-TPD, NH3-TPD, FTIR, and TG. The results indicate that the formation of Ni-Cu alloy effectively suppresses carbon deposition, while the introduction of CeO2 generates abundant oxygen vacancies. Among all catalysts, NiCuMgAl-15%Ce exhibits the highest oxygen vacancy concentration (33.80%), together with the strongest medium‑strong basic sites (250.4 °C) and medium‑strong acid sites (240.7 °C), forming an ideal acid–base synergy. Under the conditions of 600 °C and a mass space velocity of 36000 mL·g−1·h−1, this catalyst achieves CH4 and CO2 conversions of 36.2% and 53.1%, respectively, operates stably for 32 h, and shows a coke deposition of only 6.2%. Its performance is significantly superior to that of the unmodified catalyst and those with either too low or too high CeO2 contents. dry reforming of methane; Ni-based catalyst; alloy; CeO2 Wu Yixing Jiao Weihong Li Biao Bi Chenyao Wang Yan Zhang Jing Liu Yiming PUBLIC https://creativecommons.org/licenses/by-nc-nd/4.0/ dataset http://www.doi.org/10.3724/j.issn1001-3555.2026.03.005 Science Data Bank