TY - JOUR
T1 - Stability and hydrogen adsorption of metal-organic frameworks prepared via different catalyst doping methods
AU - Wang, Cheng Yu
AU - Gong, Qihan
AU - Zhao, Yonggang
AU - Li, Jing
AU - Lueking, Angela D.
N1 - Funding Information:
This work was supported by the U.S. Department of Energy, Energy Efficiency and Renewable Energy program , Award DE-FG36-08GO18139 . The authors thank Julie Anderson in Materials Characterization Lab at the Pennsylvania State University for the assistance in SEM and FESEM.
PY - 2014/10
Y1 - 2014/10
N2 - The stability of three metal-organic frameworks (MOFs), namely IRMOF-8, Cu-TDPAT, and Cu-BTC, was tested after incorporation of Pt. Stability was assessed with powder X-ray diffraction (PXRD), physical (N2 at 77 K) and chemical (H2 at 300 K) adsorption, and thermogravimetric analysis in H2 and N2. Introduction of Pt via wet precipitation led to MOF degradation during the H2 reduction step. Addition of pre-reduced Pt supported on activated carbon (Pt/AC) to MOFs via physical mixing also led to structural degradation. However, addition of Pt/AC via a 'pre-bridge' (PB) technique led to high MOF stability, with the retention of surface area, porosity, crystallinity, and thermal stability. The catalytically active surface area was assessed by hydrogen adsorption, and demonstrated extension of the catalytically active surface area to the MOF surface. High hydrogen uptake correlated with MOF particle size, due to the connectivity between Pt/AC and MOF, and the interpenetration of Pt/AC into the MOF crystal.
AB - The stability of three metal-organic frameworks (MOFs), namely IRMOF-8, Cu-TDPAT, and Cu-BTC, was tested after incorporation of Pt. Stability was assessed with powder X-ray diffraction (PXRD), physical (N2 at 77 K) and chemical (H2 at 300 K) adsorption, and thermogravimetric analysis in H2 and N2. Introduction of Pt via wet precipitation led to MOF degradation during the H2 reduction step. Addition of pre-reduced Pt supported on activated carbon (Pt/AC) to MOFs via physical mixing also led to structural degradation. However, addition of Pt/AC via a 'pre-bridge' (PB) technique led to high MOF stability, with the retention of surface area, porosity, crystallinity, and thermal stability. The catalytically active surface area was assessed by hydrogen adsorption, and demonstrated extension of the catalytically active surface area to the MOF surface. High hydrogen uptake correlated with MOF particle size, due to the connectivity between Pt/AC and MOF, and the interpenetration of Pt/AC into the MOF crystal.
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U2 - 10.1016/j.jcat.2014.07.010
DO - 10.1016/j.jcat.2014.07.010
M3 - Article
AN - SCOPUS:84906718345
SN - 0021-9517
VL - 318
SP - 128
EP - 142
JO - Journal of Catalysis
JF - Journal of Catalysis
ER -