2009 Volume 50 Issue 3 Pages 509-515
Metal–oxide surface interaction is important in catalysis. We have studied Ni on TiO2 (110) and Al2O3 (0001) by means of polarization-dependent total-reflection fluorescence extended X-ray absorption fine structure (PTRF-EXAFS) observations to elucidate the origin of metal–oxide interactions. Ni atoms interact with the dangling bond of the oxygen atoms. The Ni atoms are positively charged and bonded with more than two oxygen atoms.