Letter pubs.acs.org/JPCL
Adsorption and Photodesorption of CO from Charged Point Defects on TiO2(110) Rentao Mu,†,‡ Arjun Dahal,§ Zhi-Tao Wang,§ Zdenek Dohnálek,†,∥ Greg A. Kimmel,† Nikolay G. Petrik,*,† and Igor Lyubinetsky*,†,# †
Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States ‡ Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University; Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China § Environmental Molecular Sciences Laboratory and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States ∥ Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States S Supporting Information *
ABSTRACT: The adsorption and photochemistry of CO on rutile TiO2(110) are studied with scanning tunneling microscopy (STM), temperatureprogrammed desorption, and angle-resolved photon-stimulated desorption (PSD) at low temperatures. Site occupancies, when weighted by the concentration of each kind of adsorption site on the reduced surface, show that the adsorption probability is the highest for the bridging oxygen vacancies (VO). The probability distribution for the different adsorption sites corresponds to very small differences in CO adsorption energies (
