Title of article :
Hydrogen adsorption/absorption on Pd/Pt(1 1 1) multilayers
Author/Authors :
Duncan ، نويسنده , , Hugues and Lasia، نويسنده , , Andrzej، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Pages :
7
From page :
62
To page :
68
Abstract :
One to 20 monolayers of Pd were deposited on Pt(1 1 1) and their electrochemical behavior was studied by cyclic voltammetry and impedance spectroscopy. The hydrogen adsorption and absorption is more reversible at deposits on Pt(1 1 1) as compared to Au(1 1 1), probably due to less strain and/or electronic effects. The quantity of hydrogen adsorbed/absorbed at 10 ML are however comparable at both supports. The charge transfer resistance is lower at 1 Pd ML in perchloric and sulfuric acids than for thicker layers, and it is lower at Pd/Pt(1 1 1) than at Pd/Au(1 1 1). The adsorption pseudocapacitance reaches a maximum at 0.214 V in sulfuric acid for 1 ML and there are two peaks at 0.214 V and 0.255 V for thicker layers. Crystal violet increases the reversibility of hydrogen absorption and inhibits hydrogen adsorption although some residual adsorption remains.
Keywords :
Hydrogen absorption , Kinetics , hydrogen adsorption , 1) , Pt(1  , 1  , Pd thin layers , Poison effect
Journal title :
Journal of Electroanalytical Chemistry
Serial Year :
2008
Journal title :
Journal of Electroanalytical Chemistry
Record number :
1673517
Link To Document :
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