TY - JOUR
T1 - Effects of supports on bimetallic Pd-Cu catalysts for CO2 hydrogenation to methanol
AU - Lin, Fawei
AU - Jiang, Xiao
AU - Boreriboon, Nuttakorn
AU - Wang, Zhihua
AU - Song, Chunshan
AU - Cen, Kefa
N1 - Funding Information:
This work was supported by in part by the Pennsylvania State University through the EMS Energy Institute and Penn State Institute of Energy and the Environment. The overseas expense of FWL in the US was supported by the College of Energy Engineering and Institute for Thermal Power Engineering, Zhejiang University . The author also appreciates for work support from Tianjin University.
PY - 2019/9/5
Y1 - 2019/9/5
N2 - Lab-synthesized and commercial materials, TiO2, ZrO2, CeO2, Al2O3 and SiO2, were employed to investigate the effects of support on bimetallic Pd-Cu catalysts for CO2 hydrogenation to methanol. SiO2 was used as a benchmark with negligible MSI (metal-support interaction) and adsorption capacity. TiO2 P25 (TiO2-P1) with coexistence of anatase/rutile phase exhibited the optimal supports among TiO2 serial supports. TiO2-P1, ZrO2, and Al2O3 exhibited significant promotional effects than SiO2 support, and the methanol synthesis activity decreased as: TiO2-P1˜ZrO2>Al2O3>CeO2-D˜SiO2. Pd-Cu/TiO2-P1 and Pd-Cu/ZrO2 yielded 1.6-time more CH3OH than Pd-Cu/SiO2. Detailed characterizations demonstrated that methanol formation was mainly correlated to PdCu3 alloy and H2/CO2 adsorption. Pd-Cu/CeO2-D possessed the strongest MSI, but with alloy restructuring to form PdCux, lowered weakly adsorbed ratio of CO2 and surface adsorption ratio of H2/CO2, therefore exhibiting worse catalytic performance. Pd-Cu/TiO2-P1, Pd-Cu/ZrO2, and Pd-Cu/Al2O3 possessed moderate MSI and desirable performance.
AB - Lab-synthesized and commercial materials, TiO2, ZrO2, CeO2, Al2O3 and SiO2, were employed to investigate the effects of support on bimetallic Pd-Cu catalysts for CO2 hydrogenation to methanol. SiO2 was used as a benchmark with negligible MSI (metal-support interaction) and adsorption capacity. TiO2 P25 (TiO2-P1) with coexistence of anatase/rutile phase exhibited the optimal supports among TiO2 serial supports. TiO2-P1, ZrO2, and Al2O3 exhibited significant promotional effects than SiO2 support, and the methanol synthesis activity decreased as: TiO2-P1˜ZrO2>Al2O3>CeO2-D˜SiO2. Pd-Cu/TiO2-P1 and Pd-Cu/ZrO2 yielded 1.6-time more CH3OH than Pd-Cu/SiO2. Detailed characterizations demonstrated that methanol formation was mainly correlated to PdCu3 alloy and H2/CO2 adsorption. Pd-Cu/CeO2-D possessed the strongest MSI, but with alloy restructuring to form PdCux, lowered weakly adsorbed ratio of CO2 and surface adsorption ratio of H2/CO2, therefore exhibiting worse catalytic performance. Pd-Cu/TiO2-P1, Pd-Cu/ZrO2, and Pd-Cu/Al2O3 possessed moderate MSI and desirable performance.
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U2 - 10.1016/j.apcata.2019.117210
DO - 10.1016/j.apcata.2019.117210
M3 - Article
AN - SCOPUS:85070858008
SN - 0926-860X
VL - 585
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
M1 - 117210
ER -