期刊
ACS CATALYSIS
卷 2, 期 11, 页码 2290-2296出版社
AMER CHEMICAL SOC
DOI: 10.1021/cs3004227
关键词
In situ EXAFS; NiPt; ethylene glycol; supported catalysts; aqueous phase reforming; reverse Monte Carlo
资金
- Catalysis Center for Energy Innovation, an Energy Frontier Research Center
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001004]
- U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy
- National Advanced Biofuels Consortium
- Department of Energy's Office of Biomass Program
- US Department of Energy, Office of Basic Energy Sciences [DE-FG02-05ER15688]
The structural changes in supported NiPt/C and NiPt/gamma-Al2O3 catalysts were investigated using in situ extended X-ray absorption fine structure (EXAFS) under aqueous phase reforming (APR) of ethylene glycol conditions. Reverse Monte Carlo is introduced to analyze the EXAFS data. Parallel reactor studies of APR of ethylene glycol showed that NiPt catalysts were initially more active than monometallic Pt catalysts. The enhanced activity was correlated to changes in the catalyst structure. Under APR conditions, Ni segregated to the surface of the catalysts, resembling Ni-terminated bimetallic surfaces that were predicted to be more active than Pt from theoretical and experimental studies on model surfaces.
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