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Indexed by:期刊论文

Date of Publication:2017-09-01

Journal:CATALYSIS COMMUNICATIONS

Included Journals:SCIE、EI

Volume:100

Page Number:219-222

ISSN No.:1566-7367

Key Words:Pd; MCM-41; Nanoscale distribution; Selective hydrogenation; Hydrodesulfurization; Hydrodeoxygenation

Abstract:Two different nanoscale Pd particle distributions in MCM-41, i.e. in the mesopores and on the external surface, were obtained by using a siliceous MCM-41 and a silylated MCM-41 (S-MCM-41) as the starting support materials, respectively. The electron density of Pd in Pd/S-MCM-41 was lower than that in Pd/MCM-41. Pd/S-MCM-41 exhibited much better selective hydrogenation performance but a lower hydrogenolysis activity than Pd/MCM-41. These differences are related to the different Pd particle distributions in MCM-41 and S-MCM-41, demonstrating that the performance of noble metal catalysts is tunable by simply controlling the nanoscale metal particle distribution in the pores.