Our SBA-15-CTA mesoporous materials developed in citric acid (CTA), instead of traditional HCl intermediate, were used to support CeO₂ doped nickel catalysts in methane dry reforming reaction. Results revealed that SBA-15-CTA had a high capacity for hosting CeO₂ (up to 30 wt.%), which had strong interaction with Ni species, leading to a high reduction temperature of NiO at 442 °C. XANES analysis verified that Ni species were much more stable over Ce doped SBA-15-CTA than un-doped ones, which helped the Ni species maintain their metallic state. As demonstrated through TPSR analysis, CH₄ and CO₂ was converted to syngas at a high rate at a low initiation temperature over Ce doped Ni/SBA-15-CTA catalysts. Despite both catalysts having similar performance, Ni/30CeO₂-SBA-15-CTA yielded a much lower coke deposition rate (4.9% vs 22.4% on Ni/10CeO₂-SBA-15-CTA). A desirable endurance to metal sintering and carbon elimination rate was achieved over 5Ni/15CeO₂-SBA-15-CTA catalyst, owing to the high concentration of oxygen vacancy coupled with the high amount of Ce³⁺.

我们在柠檬酸 (CTA) 中开发的 SBA-15-CTA 介孔材料，而不是传统的 HCl 中间体，用于在甲烷干重整反应中支持 CeO ₂掺杂的镍催化剂。结果表明，SBA-15-CTA 具有很高的承载 CeO _{2 的}能力（高达 30 wt.%），它与 Ni 物种有很强的相互作用，导致 NiO 的还原温度高达 442 °C。XANES 分析证实，在掺 Ce 的 SBA-15-CTA 上，Ni 物种比未掺杂的更稳定，这有助于 Ni 物种保持其金属状态。正如通过 TPSR 分析所证明的，CH ₄和 CO ₂在 Ce 掺杂的 Ni/SBA-15-CTA 催化剂上，在低引发温度下以高速率转化为合成气。尽管两种催化剂具有相似的性能，但 Ni/30CeO ₂ -SBA-15-CTA 的焦炭沉积率要低得多（Ni/10CeO ₂ -SBA-15-CTA 为4.9% 对 22.4% ）。由于氧空位浓度高和Ce ³⁺含量高，5Ni/15CeO ₂ -SBA-15-CTA 催化剂具有理想的金属烧结耐受性和碳消除率。