期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 206, 期 -, 页码 221-232出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2017.01.030
关键词
Transition metal-doped Au-Pd nanoparticle; Three-dimensionally ordered macroporous; Mn2O3; Methane oxidation; O-xylene oxidation; Oxygen activation
资金
- NSF of China [21377008, 21477005, 21677004]
- National High Technology Research and Development Program of China (863 Program) [2015AA034603]
- Beijing Nova Program [Z141109001814106]
- NSF of Beijing Municipal Commission of Education [KM201410005008]
- Foundation on the Creative Research Team Construction Promotion Project of Beijing Municipal Institutions
- Scientific Research Base Construction-Science and Technology Creation Platform-National Materials Research Base Construction
Palladium-based catalysts are highly active for eliminating volatile organic compounds. Reducing the use of noble metals and enhancing performance of a catalyst are always desirable. The three-dimensionally ordered macroporous (3DOM) Mn2O3-supported transition metal M (M=Mn, Cr, Fe, and Co)-doped Au-Pd nanoparticles (NPs) with an Au-Pd-xM loading of 1.86-1.97 wt% were prepared using the modified polyvinyl alcohol-protected reduction method. It is found that the Au-Pd-xM NPs with a size of 3.6-4.4nm were highly dispersed on the surface of 3DOM Mn2O3. The 1.94wt% Au-Pd-0.21Co/3DOM Mn2O3 and 1.94wt% Au-Pd-0.22Fe/3DOM Mn2O3 samples performed the best for the oxidation of methane and o-xylene, respectively. The methane oxidation rate at 340 degrees C (339.0 x 10(-6) mol/(g(pd) s)) over 1.94wt% Au-Pd-0.21Co/3DOM Mn2O3 was three times higher than that (93.8 x 10-6 mol/(gpd s)) over 1.97 wt% Au-Pd/3DOM Mn2O3, and the o-xylene reaction rate at 140 degrees C (2.59 mu mol/(g(N) s) over 1.94wt% Au-Pd-0.22Fe/3DOM Mn2O3 was two times higher than that (0.93 mu mol/(g(N) s) over 1.97 wt% Au-Pd/3DOM Mn2O3. It is concluded that doping a certain amount of the transition metal to Au-Pd/3 DOM Mn2O3 could modify the microstructure of the alloy NPs, thus improving the oxygen activation and methane adsorption ability. We are sure that the M-doped Au-Pd/3DOM Mn2O3 materials are promising catalysts for the efficient removal of volatile organic compounds. (C) 2017 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据