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Interaction between Palladium Nanoparticles and Surface‐Modified Carbon Nanotubes: Role of Surface Functionalities
Author(s) -
Zhang Bingsen,
Shao Lidong,
Zhang Wei,
Sun Xiaoyan,
Pan Xiaoli,
Su Dang Sheng
Publication year - 2014
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201402272
Subject(s) - palladium , catalysis , carbon nanotube , x ray photoelectron spectroscopy , nanoparticle , metal , carbon fibers , selectivity , materials science , surface modification , oxygen , chemical engineering , chemistry , nanotechnology , inorganic chemistry , organic chemistry , composite number , composite material , engineering
Abstract It is crucial to accurately describe the interaction between the surface functionality and the supported metal catalyst because it directly determines the activity and selectivity of a catalytic reaction. It is, however, challenging with a metal–carbon catalytic system owing to the ultrafine feature, instability, and subtle response of the components upon application of an external field. Herein, we use in situ TEM, electron energy loss spectroscopy, and X‐ray photoelectron spectroscopy techniques to record the interaction in palladium on carbon nanotubes (CNTs) from room temperature to 600 °C. We focus on probing the effects of oxygen and nitrogen‐containing functional groups on supported palladium nanoparticles (NPs) in the model catalytic system. The stability of palladium NPs supported on CNTs depends strongly on the surface properties of CNTs. Moreover, the oxygen‐containing functional groups on the CNT surfaces, such as carboxylic acids and anhydrides, have an even stronger interaction with palladium NPs than the nitrogen‐containing counterparts. Our work contributes to elucidation of the complex metal–carbon interaction and unlocks potential in activity and selectivity control of these catalytic systems.