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Catalysis of Multi‐walled Carbon Nanotubes Supported Pd x Co y Nanoparticles Prepared by a Pyrolysis Method Using Ionic Liquids as the Solvent toward Ethanol Oxidation Reaction
Author(s) -
Yang Hongwei,
Wang Yahui,
Cao Yanli,
Zheng Chunbao,
Liu Lu,
Liu Likun,
Ding Keqiang,
Rapole Sowjanya B.,
Wang Yiran,
Guo Zhanhu
Publication year - 2013
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201300009
Subject(s) - ionic liquid , catalysis , chemistry , carbon nanotube , hexafluorophosphate , cyclic voltammetry , nanoparticle , solvent , transmission electron microscopy , inorganic chemistry , electrochemistry , chemical engineering , nuclear chemistry , nanotechnology , organic chemistry , materials science , electrode , engineering
Multi‐walled carbon nanotubes (MWCNTs) decorated with Pd x Co y (the nominal atomic ratios of Pd to Co were 3:1, 3:1.5, 3:2, 3:3, respectively) nanoparticles (denoted as Pd x Co y /MWCNTs ) were fabricated by a simple pyrolysis process, in which room temperature ionic liquids (RTILs) of butyl‐3‐methylimidazolium hexafluorophosphate (denoted as [BMIM]PF 6 ) was used as the solvent. X‐ray diffraction (XRD) and transmission electron microscopy (TEM) were all used to characterize the Pd x Co y /MWCNTs catalysts, showing that the Pd x Co y particles were dispersed on the surface of the MWCNTs with an average particle size of ∼25.0 nm. The electro‐catalytic activity of the Pd x Co y /MWCNTs catalysts toward ethanol oxidation reaction (EOR) was examined by cyclic voltammetry (CV). It was revealed that the onset potential was ∼90 mV lower and the peak current was about four times higher for ethanol oxidation for Pd 3 Co 1.5 /MWCNTs compared to those of Pd 3 Co 1 /MWCNTs. The possible catalysis mechanisms of the Pd 3 Co 1.5 /MWCNTs toward EOR were also discussed.