Three-Dimensionally Ordered Macroporous MnxCe1鈥?i>xO未 and Pt/Mn0.5Ce0.5O未 Catalysts: Synthesis and Catalytic Performance fo

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• 作者：Xuehua Yu ; Jianmei Li ; Yuechang Wei ; Zhen Zhao ; Jian Liu ; Baofang Jin ; Aijun Duan ; Guiyuan Jiang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：June 11, 2014
• 年：2014
• 卷：53
• 期：23
• 页码：9653-9664
• 全文大小：745K
• 年卷期：v.53,no.23(June 11, 2014)
• ISSN：1520-5045

文摘

Three-dimensionally ordered macroporous (3DOM) Mn_xCe_1鈥?i>xO_未 oxides with different ratios of Mn to Ce were successfully synthesized by colloidal crystal template (CCT) method, and 3DOM Pt/Mn_0.5Ce_0.5O_未 with varied Pt loadings were prepared by in situ ethylene glycol (EG) reduction method. 3DOM Mn_xCe_1鈥?i>xO_未 supports exhibited well-defined 3DOM nanostructure, and Pt nanoparticles (NPs) with 1鈥? nm size were evenly dispersed on the inner walls of uniform macropores. Among 3DOM Mn_xCe_1鈥?i>xO_未 catalysts, 3DOM Mn_0.5Ce_0.5O_未 showed excellent catalytic activity for soot combustion; i.e., T₅₀ is 358 掳C and S_CO2^m is 94.2%. 3DOM Pt/Mn_0.5Ce_0.5O_未 catalysts exhibited higher activity than 3DOM Mn_xCe_1鈥?i>xO_未 and 3 wt % Pt/Mn_0.5Ce_0.5O_未 showed the highest catalytic activity for soot combustion (T₅₀ is 342 掳C and S_CO2^m is 96.7%). Macropores effect, synergistic effects between Mn and Ce, and synergistic effects between Pt and Mn_0.5Ce_0.5O_未 support are contributed to high catalytic activities of as-prepared catalysts.