Abnormal infrared effects (AIREs) of nm-Ru/GC electrode towards CO adsorption in alkaline solutions
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The adsorption of CO on electrode of nanometer thin film of Ru in 0.1 mol.L-1 NaOH solution was studied by using in-situ FTIR spectroscopy. The results revealed that the adsorbed CO in alkaline solutions is mainly in linear bonded form that yields IR absorption at around 1 960 cm(-1), and a small portion of bridge bonded CO was also determined near 1 780 cm(-1). The band centers of COL and COB have been red-shifted respectively about 50 and 60 cm(-1) in comparision with the values measured in acid medium. The enhancement factor of IR absorption of CO on nm-Ru/GC electrode has been measured at 33 in 0.1 mol.L-1 NaOH solution, which is ;more than 2 times larger than the value determined in a 0.1 MH2SO4 solution.