Polymer-Assisted Co-Assembly towards Synthesis of Mesoporous Titania Encapsulated Monodisperse PdAu for Highly Selective Hydrogenation of Phenylacetylene
Hu, MZ (Hu, Mingzhen)[ 1,2 ] ; Jin, L (Jin, Lei)[ 2 ] ; Su, XS (Su, Xingsong)[ 1,2 ] ; Bamonte, S (Bamonte, Scott)[ 2 ] ; Lu, XX (Lu, Xingxu)[ 3 ] ; Gao, PX (Gao, Puxian)[ 3,4 ] ; Suib, SL (Suib, Steven L.)[ 2,3,4 ] ; Liu, B (Liu, Ben)[ 1 ]*（刘犇）; He, J (He, Jie)[ 2,3 ]*
[ 1 ] Nanjing Normal Univ, Sch Chem & Mat Sci, Collaborat Innovat Ctr Biomed Funct Mat, Jiangsu Key Lab New Power Batteries, Nanjing 210023, Jiangsu, Peoples R China
[ 2 ] Univ Connecticut, Dept Chem, Storrs, CT 06269 USA
[ 3 ] Univ Connecticut, Inst Mat Sci, Storrs, CT 06269 USA
[ 4 ] Univ Connecticut, Dept Mat Sci & Engn, Storrs, CT 06269 USA
Bimetallic nanoalloys have attracted great research interest in the past decades by virtue of their tunable metal-metal synergies. The preparation of well-defined bimetallic nanoalloys largely relies on the use of capping ligands, which brings a great challenge to utilize the surface-accessible active sites and/or tailor bimetallic-support interactions. In the current paper, surface-clean, thermally stable and monodisperse PdAu nanoalloys confined in mesoporous TiO2 (PdAu@mTiO(2)) were prepared using evaporation-induced self-assembly with two colloidal templates. The hydrogenation activity of PdAu@mTiO(2) was demonstrated to be approximately 6 times higher than that of PdAu nanoalloys supported on mesoporous silica due to the bimetallic-support interactions. Our method is expected to open up new opportunities to synthesize ligand-free and stable bimetallic nanoalloys with tailored bimetallic-support interactions for highly efficient catalysis.