TY - JOUR
T1 - Effect of oxide supports on Pd-Ni bimetallic catalysts for 1,3-butadiene hydrogenation
AU - Hou, Ruijun
AU - Porosoff, Marc D.
AU - Chen, Jingguang G.
AU - Wang, Tiefeng
N1 - Publisher Copyright:
© 2014 Elsevier B.V. All rights reserved.
PY - 2015/1/25
Y1 - 2015/1/25
N2 - Our previous work showed that the Pd-Ni bimetallic catalyst had better hydrogenation activity and 1-butene selectivity in the selective hydrogenation of 1,3-butadiene. In the present work, the effect of oxide supports on the hydrogenation of 1,3-butadiene was studied over Pd-Ni bimetallic catalysts supported on 7-Al2 O3, SiO2, CeO2, ZrO2 and TiO2. Transmission electron microscopy (TEM) and extended X-ray absorption fine structure (EXAFS) were used to characterize the particle size and the extent of Pd-Ni bimetallic bond formation, respectively. The support effect affected the bimetallic particle structure, but appeared to have no apparent influence in the hydrogenation activity. All the bimetallic catalysts showed ∼100% selectivity to butenes; however, the supports affected the 1-butene selectivity. PdNi/γ-Al2O3 showed the highest 1-butene selectivity of ∼80% at 1,3-butadiene conversions lower than 50% but decreased rapidly at higher conversion. The different performance of the supports in 1-butene selectivity might be attributed to strong metal-support interaction (SMSI), the oxygen defects and the geometric/electronic effect on the catalysts.
AB - Our previous work showed that the Pd-Ni bimetallic catalyst had better hydrogenation activity and 1-butene selectivity in the selective hydrogenation of 1,3-butadiene. In the present work, the effect of oxide supports on the hydrogenation of 1,3-butadiene was studied over Pd-Ni bimetallic catalysts supported on 7-Al2 O3, SiO2, CeO2, ZrO2 and TiO2. Transmission electron microscopy (TEM) and extended X-ray absorption fine structure (EXAFS) were used to characterize the particle size and the extent of Pd-Ni bimetallic bond formation, respectively. The support effect affected the bimetallic particle structure, but appeared to have no apparent influence in the hydrogenation activity. All the bimetallic catalysts showed ∼100% selectivity to butenes; however, the supports affected the 1-butene selectivity. PdNi/γ-Al2O3 showed the highest 1-butene selectivity of ∼80% at 1,3-butadiene conversions lower than 50% but decreased rapidly at higher conversion. The different performance of the supports in 1-butene selectivity might be attributed to strong metal-support interaction (SMSI), the oxygen defects and the geometric/electronic effect on the catalysts.
KW - 1,3-Butadiene
KW - Pd-Ni bimetallic catalysts
KW - Selective hydrogenation
KW - Support effect
UR - http://www.scopus.com/inward/record.url?scp=84912533133&partnerID=8YFLogxK
U2 - 10.1016/j.apcata.2014.11.001
DO - 10.1016/j.apcata.2014.11.001
M3 - Article
AN - SCOPUS:84912533133
SN - 0926-860X
VL - 490
SP - 17
EP - 23
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
ER -