“…As mentioned earlier, the research directed to modulate the metal-support interaction can be envisaged from many viewpoints, such as the use of crystallographic phases different from the typical gamma alumina [38] or supporting the active phases over unconventional single metal (Ms) oxides such as those based on Ti [26,[39][40][41][42][43][44][45], Zr [26,[41][42][43][44]46,47], Si [23,26,[48][49][50] or Ga [51]. Nevertheless, more recently to gain advantage from the individual single metal oxide properties and to overcome their intrinsic limitations, several binary mixed oxide materials such as Al2O3-Ga2O3 [50], Al2O3-TiO2 [4,52-57], ZrO2-TiO2 [35,58,59], Al2O3-ZrO2 [60][61][62], MgO-TiO2 [63], Al2O3-MgO [56,64], Mn-Al2O3 [65][66][67], and Al2O3-zeolite [68] have been studied, among several others that have been tested to prepare HDS catalysts. As expected, in several cases higher activities of catalysts prepared over those mixed oxides were reported compared with those supported on alumina.…”