Title of article :
Palladium dispersed multiwalled carbon nanotube based hydrogen sensor for fuel cell applications
Author/Authors :
Krishna Kumar، نويسنده , , M. and Ramaprabhu، نويسنده , , S.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Pages :
9
From page :
2518
To page :
2526
Abstract :
Palladium nanocatalysts supported on surface-oxidized multiwalled carbon nanotubes (MWNT) were prepared by the aqueous solution reduction of PdCl 2 . MWNT have been synthesized by catalytic chemical vapor deposition (CCVD) technique. Pyrolysis of acetylene using a fixed-bed catalytic reactor over rare earth (RE) based AB 2 alloy hydride catalyst, obtained through hydrogen decrepitation technique, has been performed to synthesize MWNT. Structural, morphological and vibrational characterizations have been carried out using XRD, SEM, TEM and Raman spectroscopy, respectively. In situ electrical resistance measurements for thin films of MWNT obtained by spin coating samples were carried out by two-probe technique in a chamber with provision to introduce known concentration of hydrogen in constant air flow. Investigations of hydrogen sensing properties of Pd–MWNT ensembles have been carried out. The stability of Pd–MWNT thin films after several cycles of adsorption and desorption was studied. The change in electrical resistance due to hydrogen adsorption is reversible, with increase to saturation on exposure to hydrogen gas. The results demonstrate that chemically treated MWNT functionalized with nanostructured Pd show good H 2 sensing response at room temperature.
Keywords :
Carbon nanotubes , Pd dispused CNT , Hydrogen sensor , MWNT , Functionlization
Journal title :
International Journal of Hydrogen Energy
Serial Year :
2007
Journal title :
International Journal of Hydrogen Energy
Record number :
1652611
Link To Document :
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