Effects of Surface Defects on Adsorption of CO and Methyl Groups on Rutile TiO$_\text{2}$(110)

The interaction of reactants with catalysts has always been an important subject for catalytic reactions. As a promising catalyst with versatile applications, titania has been intensively studied for decades. In this work we have investigated the role of bridge bonded oxygen vacancy (O\begin{document}$_\textrm{v}$\end{document}) in methyl groups and carbon monoxide (CO) adsorption on rutile TiO\begin{document}$_2$\end{document}(110) (R-TiO\begin{document}$_2$\end{document}(110)) with the temperature programmed desorption technique. The results show a clear different tendency of the desorption of methyl groups adsorbed on bridge bonded oxygen (O\begin{document}$_\textrm{b}$\end{document}), and CO molecules on the five coordinate Ti\begin{document}$^{4+}$\end{document} sites (Ti\begin{document}$_{5\textrm{c}}$\end{document}) as the O\begin{document}$_\textrm{v}$\end{document} concentration changes, suggesting that the surface defects may have crucial influence on the absorption of species on different sites of R-TiO\begin{document}$_2$\end{document}(110).