Correlating Ethylene Glycol Reforming Activity with In Situ EXAFS Detection of Ni Segregation in Supported NiPt Bimetallic Catalysts
ACS Catalysis2012Vol. 2(11), pp. 2290–2296
Citations Over TimeTop 10% of 2012 papers
Sarah A. Tupy, Ayman M. Karim, Christina Bagia, Weihua Deng, Yulin Huang, Dionisios G. Vlachos, Jingguang G. Chen
Abstract
The structural changes in supported NiPt/C and NiPt/γ-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.
Related Papers
- → A new type of catalysts: catalysts of singly dispersed bimetallic sites(2023)12 cited
- → γ-Al2O3-Supported Pt Catalysts with Extremely High Dispersions Resulting from Pt–W Interactions(2000)39 cited
- → EXAFS Characterization of Rh−Pt Metal Clusters Supported on NaY Zeolite(1997)24 cited
- → EXAFS, XRD and RMC studies of an Amorphous Ga$_{50}$Se$_{50}$ Alloy Produced by Mechanical Alloying(2003)
- → ChemInform Abstract: EXAFS Evidence for Direct Rh‐Fe Bonding in SiO2‐Supported Rh‐Fe Bimetallic Catalysts.(1986)