TY - JOUR
T1 - Fabrication of Pd@ZIF-8 catalysts with different Pd spatial distributions and their catalytic properties
AU - Ding, Shuaishuai
AU - Yan, Qing
AU - Jiang, Hong
AU - Zhong, Zhaoxiang
AU - Chen, Rizhi
AU - Xing, Weihong
N1 - Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2016/7/15
Y1 - 2016/7/15
N2 - By adjusting the addition time of palladium nanoparticles, during the formation of ZIF-8, an efficient and facile method was proposed to control the palladium spatial distribution within ZIF-8 crystals. Characterizations reveal that the addition time can significantly affect the particle size of Pd@ZIF-8 and palladium spatial distribution. As the PVP-stabilized palladium nanoparticles are added at the early stage of the ZIF-8 formation, larger ZIF-8 crystals with completely embedded palladium nanoparticles can be obtained. Introducing the PVP-stabilized palladium nanoparticles later can lead to the formation of smaller ZIF-8 crystals with all the palladium nanoparticles on the outer surfaces of ZIF-8. The catalytic performance of Pd@ZIF-8 strongly depends on the palladium spatial distribution, and the Pd@ZIF-8 with completely embedded palladium nanoparticles can provide excellent product selectivity and better catalytic stability in the hydrogenation of alkenes.
AB - By adjusting the addition time of palladium nanoparticles, during the formation of ZIF-8, an efficient and facile method was proposed to control the palladium spatial distribution within ZIF-8 crystals. Characterizations reveal that the addition time can significantly affect the particle size of Pd@ZIF-8 and palladium spatial distribution. As the PVP-stabilized palladium nanoparticles are added at the early stage of the ZIF-8 formation, larger ZIF-8 crystals with completely embedded palladium nanoparticles can be obtained. Introducing the PVP-stabilized palladium nanoparticles later can lead to the formation of smaller ZIF-8 crystals with all the palladium nanoparticles on the outer surfaces of ZIF-8. The catalytic performance of Pd@ZIF-8 strongly depends on the palladium spatial distribution, and the Pd@ZIF-8 with completely embedded palladium nanoparticles can provide excellent product selectivity and better catalytic stability in the hydrogenation of alkenes.
KW - Alkene hydrogenation
KW - Pd@ZIF-8
KW - Size-selective catalysis
KW - Spatial distribution
KW - Zeolitic imidazolate frameworks
UR - http://www.scopus.com/inward/record.url?scp=84962106176&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2016.03.098
DO - 10.1016/j.cej.2016.03.098
M3 - 文章
AN - SCOPUS:84962106176
SN - 1385-8947
VL - 296
SP - 146
EP - 153
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -