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Efficient Anchorage of Palladium Nanoparticles on the Multi‐Walled Carbon Nanotubes as Electrocatalyst for the Hydrazine Electrooxidation in Strong Acidic Solutions
Author(s) -
Liang Y.,
Wu K.,
Ge C.,
Zhou Y.,
Chen Y.,
Tang Y.,
Lu T.
Publication year - 2012
Publication title -
fuel cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.485
H-Index - 69
eISSN - 1615-6854
pISSN - 1615-6846
DOI - 10.1002/fuce.201200078
Subject(s) - catalysis , palladium , particle size , electrocatalyst , carbon nanotube , hydrazine (antidepressant) , hydrolysis , materials science , nanoparticle , chemical engineering , electrochemistry , particle (ecology) , dispersion (optics) , inorganic chemistry , precipitation , nuclear chemistry , chemistry , nanotechnology , organic chemistry , chromatography , electrode , oceanography , physics , optics , geology , meteorology , engineering
A facile homogeneous precipitation–reduction reaction method, which involves PdCl 2 → PdO · H 2 O → Pd 0 reaction path, is used to synthesize the multi‐walled carbon nanotubes (MWCNTs) supported Pd nanoparticles (Pd/MWCNTs) catalysts. The particle size of Pd/MWCNTs catalysts can be easily tuned by controlling the hydrolysis temperature of PdCl 2 . X‐ray diffraction (XRD) and transmission electron microscopy (TEM) measurements show the particle size of Pd/MWCNTs catalysts increases with hydrolysis temperature of PdCl 2 , which is ascribed to the fact that the particle size of PdO · H 2 O nanoparticles increases with hydrolysis temperature of PdCl 2 . At the lower hydrolysis temperature, the as‐prepared Pd/MWCNTs catalyst possesses the higher dispersion and the smaller particle size. Consequently, the resultant Pd/MWCNTs catalyst exhibits the big electrochemical active surface area and the excellent electrocatalytic performance for hydrazine electrooxidation in strong acidic solutions. In addition, the electrochemical measurement indicate that particle size effect of Pd‐NPs occurs during the N 2 H 4 electrooxidation. In brief, the mass activity and specific activity of the Pd/MWCNTs catalyst increases and decreases with decreasing the particle size of Pd‐NPs for the N 2 H 4 electrooxidation, respectively.