Metal Support Interaction in Pt Nanoparticles Partially Confined in the Mesopores of Microsized Mesoporous CeO2 for Highly Efficient Purification of Volatile Organic Compounds
Metal Support Interaction in Pt Nanoparticles Partially Confined in the Mesopores of Microsized Mesoporous CeO2 for Highly Efficient Purification of Volatile Organic Compounds
复制标题
部分限制在微米介孔 CeO2 介孔中的 Pt 纳米粒子中的金属载体相互作用，用于高效纯化挥发性有机化合物
DOI：
10.1021/acscatal.5b02371
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发表时间：
2016-01-01
期刊：
影响因子：
12.9
通讯作者：
Zhao, Xiujian
中科院分区：
文献类型：
--
作者：
Mao, Mingyang;Ly, Haiqin;Zhao, Xiujian
The Pt/CeO2 nanocomposites of Pt nanoparticles partially confined in the mesopores of microsized mesoporous CeO2 (1.0% Pt/CeO2-MM) or supported on the surface of CeO2 nanocubes (1.0% Pt/CeO2-NC) with the same Pt loading of 1.0 wt % were prepared by the impregnation of microsized mesoporous CeO2 or CeO2 nanocubes with Pt(NO3)2 aqueous solution, followed by the reduction with NaBH4 aqueous solution. 1.0%Pt/CeO2-MM exhibits much higher catalytic activity for benzene oxidation than 1.0%Pt/CeO2-NC. Compared to 1.0% Pt/CeO2-NC, the reaction temperatures of T50 and T90 (corresponding to a benzene conversion = 50% and 90%) for 1.0% Pt/CeO2-MM tremendously decreases by ΔT50 = 149 °C and ΔT90 = 196 °C, respectively. The turnover frequency (TOF) of 1.0% Pt/CeO2-MM at 140 °C increases by 9.0 times as compared to that of 1.0% Pt/CeO2-NC. The tremendous enhancement in the catalytic activity is due to a novel metal support interaction in 1.0% Pt/CeO2-MM. The novel metal support interaction is theoretically studied by de...
