Ru nanoparticles on TiO2 with various anatase-to-rutile ratios tuned by selective chemical dissolution: Effect of support polymorph composition on selective benzene hydrogenation

•TiO2 with different anatase-to-rutile molar ratios (nA/nR) were fabricated.•The performances of Ru/TiO2 catalysts in selective benzene hydrogenation were tested.•TiO2 with nA/nR of 0.88–2.66 supported Ru NPs exhibited high S0 of 92–95%.•The impact of nA/nR on activity and selectivity of Ru/TiO2 catalysts was unveiled.