Electroreduction of Carbon Dioxide on Platinum Single Crystal Electrodes:Electrochemical and In-situ FTIR Studies

摘要

Fourier transform infrared reflectance spectroscopy (FTIRRAS) has been used inconjunction with linear sweep voltammetry to examine the reduction of CO2 on platinum single crystal surfaces in 0.1 M HC104. The data indicate that CO2 reduction on the Pt(100) and Pt(110) surfaces, potentiostated in a CO2 saturated solution yields CO as a reduction product in the hydrogen adsorption region. The CO is adsorbed in two states; linear CO and a large amount of the bridge-bonded were found on the Pt(100) while linear CO and only a small amount of bridged CO were found on the Pt(110). The Pt(111) surface showed only a low activity for CO2 reduction in the hydrogen adsorption region.