Partial oxidation of methanol over copper supported on nanoshaped ceria for hydrogen production

被引：54
作者：
Araiza, Daniel G. [1 ]
Gomez-Cortes, Antonio [1 ]
Diaz, Gabriela [1 ]
机构：
[1] Univ Nacl Autonoma Mexico, Inst Fis, Circuito Invest Cient S-N,Cd Univ, Mexico City 04510, DF, Mexico
来源：
CATALYSIS TODAY | 2017年 / 282卷
关键词：
Nanoshaped ceria; Copper; Hydrogen; Methanol; POM; PREFERENTIAL CO OXIDATION; EXPOSED FACE PRESENT; CUO/CEO2; CATALYSTS; CU/ZNO/AL2O3; CATALYST; REDOX PROPERTIES; CEO2; SUPPORT; EXCESS H-2; CU; DECOMPOSITION; PERFORMANCE;
D O I：
10.1016/j.cattod.2016.06.055
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Copper (5 wt.%) supported on ceria nanopolyhedra, nanorods and nanocubes was studied as catalyst for hydrogen production from partial oxidation of methanol (POM). Supports were prepared by hydrothermal approach and addition of copper was achieved by wet impregnation. Catalysts were characterized by EDS, XRD, TEM, HRTEM, Ny adsorption, H-2-TPR, N2O Chemisorption, CH3OH-TPD, Raman and DRIFT spectroscopies. POM reaction was studied at O-2/CH3OH molar ratio of 0.3 as a function of temperature in the range 160-280 degrees C and as a function of time on stream for 24h at 265 degrees C. As a result of the support morphology the following features were observed: (i) variety of copper species on the surface of the nanoshaped ceria; (ii) different capability and stability of carbonate formation; (iii) desorption of products from CH3OH-TPD at different temperatures; (iv) activity, selectivity and stability variations in the POM reaction related to oxidation state of the copper phase. At constant temperature, polyhedra and rod-like catalysts show similar performance, but the former one produces lower amounts of CO. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：185 / 194
页数：10
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