TY - GEN
T1 - Bimetallic nanocatalysts in mesoporous silica for steam reforming reactions to produce H2 for fuel cells
AU - Kosaraju, K.
AU - Rahman, A.
AU - Duncan, M.
AU - Tatineni, B.
AU - Basova, Y.
AU - Deshmane, V.
AU - Abrokwah, R.
AU - Hosseinnezhad, S.
AU - King, J.
AU - Ilias, S.
AU - Kuila, D.
PY - 2014
Y1 - 2014
N2 - Bimetallic nanocatalysts in ordered MCM-41 mesoporous silica have been synthesized using a one-pot hydrothermal procedure. The catalysts have been characterized using N2 adsorption-desorption isotherms, X-ray diffraction, highresolution transmission electron microscopy, Fourier transform infrared spectroscopy, and thermogravimetric-differential scanning calorimetry techniques. The mesoporous silica support showed surface area of about 974 m2/g and average pore size of 2.8 nm while upon metal encapsulation they decreased to 775 m2/g and 2.16 nm, respectively. While the small angle XRD studies confirmed the ordered structure of the silica, the HRTEM studies show uniform distribution of the metallic nanoparticles in mesoporous silica. Initial studies of the bimetallic nanocatalysts showed excellent activity for methanol conversion (~97% for Pd-Co/MCM-41 vs ~ 40% for Co/MCM-41) and selectivity to hydrogen (~95% for Pd-Co/MCM-41 vs 81% for Co/MCM-41), compared to the MCM-41containing only Pd or Co metal. This result suggested a synergistic interaction between the bimetallic nanocatalysts which resulted in a high methanol conversion and superior selectivity compared to the catalysts containing individual metals. Further investigations are underway to observe the effect of metal loading and the weight ratio on CO selectivity, methanol conversion, and catalyst deactivation at different operating conditions.
AB - Bimetallic nanocatalysts in ordered MCM-41 mesoporous silica have been synthesized using a one-pot hydrothermal procedure. The catalysts have been characterized using N2 adsorption-desorption isotherms, X-ray diffraction, highresolution transmission electron microscopy, Fourier transform infrared spectroscopy, and thermogravimetric-differential scanning calorimetry techniques. The mesoporous silica support showed surface area of about 974 m2/g and average pore size of 2.8 nm while upon metal encapsulation they decreased to 775 m2/g and 2.16 nm, respectively. While the small angle XRD studies confirmed the ordered structure of the silica, the HRTEM studies show uniform distribution of the metallic nanoparticles in mesoporous silica. Initial studies of the bimetallic nanocatalysts showed excellent activity for methanol conversion (~97% for Pd-Co/MCM-41 vs ~ 40% for Co/MCM-41) and selectivity to hydrogen (~95% for Pd-Co/MCM-41 vs 81% for Co/MCM-41), compared to the MCM-41containing only Pd or Co metal. This result suggested a synergistic interaction between the bimetallic nanocatalysts which resulted in a high methanol conversion and superior selectivity compared to the catalysts containing individual metals. Further investigations are underway to observe the effect of metal loading and the weight ratio on CO selectivity, methanol conversion, and catalyst deactivation at different operating conditions.
KW - Bimetallic nanocatalysts
KW - MCM-41
KW - SRR
UR - https://www.scopus.com/pages/publications/84896044203
U2 - 10.2495/FEEM20130401
DO - 10.2495/FEEM20130401
M3 - Conference contribution
AN - SCOPUS:84896044203
SN - 9781845648572
T3 - WIT Transactions on Engineering Sciences
SP - 337
EP - 344
BT - Future Energy, Environment and Materials
PB - WITPress
T2 - 2013 International Conference on Future Energy, Environment, and Materials, FEEM 2013
Y2 - 24 December 2013 through 25 December 2013
ER -