naa a22 4500 510733875 CHVBK 20180411083002.0 cr unu---uuuuu 180411e20131101xx s 000 0 eng 10.1007/s12039-013-0515-6 doi (NATIONALLICENCE)springer-10.1007/s12039-013-0515-6 Synthesis and characterization of bimetallic nanocatalysts and their application in selective hydrogenation of citral to unsaturated alcohols [Elektronische Daten] [S ANANTHAN, R SURESH, K GIRIBABU, V NARAYANAN] TiO2-supported bimetallic nanocatalysts were prepared and reduced at two different temperatures, 375°C and 575°C for selective hydrogenation of citral to corresponding unsaturated alcohols (geraniol (GOL) and nerol (NOL)). The nanocatalysts were characterized by difference techniques of Fourier transform infrared spectroscopy (FT-IR), Brunauer, Emmett and Teller (BET) surface area measurement, scanning electron microscopy (SEM), Energy Dispersive X-ray Analysis (EDAX), transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The prepared nanocatalysts are uniformly dispersed with an average particle size of 50-100nm and zero valence metallic state. Catalysts reduced at higher temperature lead to an increase in selectivity toward unsaturated alcohols (GOL and NOL). The Pt-Ru/TiO2 shows higher activity compared to Pt-Pd/TiO2 and Pt-Au/TiO2 nanocatalysts. In addition, a second metal (Ru) also leads to an increase in GOL and NOL selectivity during citral hydrogenation. Partially generated oxidized second metal species due to the difference in electronegativity, strongly binds the C=O group and also paves the way for selective activation of C=O bond. Graphical Abstract The Pt-Ru/TiO2 nanocatalyst reduced at higher temperature leads to an increase in selectivity toward unsaturated alcohols (GOL and NOL). The addition of second metal (Ru) generates partial positive charge on Ru centre due to the difference in electronegativity, which strongly binds C=O group and paves way for the selective activation of the C=O bond. Indian Academy of Sciences, 2013 Bimetallic nanocatalysts nationallicence TiO2-supported nationallicence Pt-Ru nationallicence citral hydrogenation nationallicence unsaturated alcohols nationallicence ANANTHAN S. School of Chemical Sciences, Department of Inorganic Chemistry, University of Madras, Guindy Campus, 600 025, Chennai, India aut SURESH R. School of Chemical Sciences, Department of Inorganic Chemistry, University of Madras, Guindy Campus, 600 025, Chennai, India aut GIRIBABU K. School of Chemical Sciences, Department of Inorganic Chemistry, University of Madras, Guindy Campus, 600 025, Chennai, India aut NARAYANAN V. School of Chemical Sciences, Department of Inorganic Chemistry, University of Madras, Guindy Campus, 600 025, Chennai, India aut Journal of Chemical Sciences Springer India 125/6(2013-11-01), 1365-1374 0974-3626 125:6<1365 2013 125 12039 https://doi.org/10.1007/s12039-013-0515-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12039-013-0515-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- ANANTHAN S. School of Chemical Sciences, Department of Inorganic Chemistry, University of Madras, Guindy Campus, 600 025, Chennai, India aut NATIONALLICENCE 700 1- SURESH R. School of Chemical Sciences, Department of Inorganic Chemistry, University of Madras, Guindy Campus, 600 025, Chennai, India aut NATIONALLICENCE 700 1- GIRIBABU K. School of Chemical Sciences, Department of Inorganic Chemistry, University of Madras, Guindy Campus, 600 025, Chennai, India aut NATIONALLICENCE 700 1- NARAYANAN V. School of Chemical Sciences, Department of Inorganic Chemistry, University of Madras, Guindy Campus, 600 025, Chennai, India aut NATIONALLICENCE 773 0- Journal of Chemical Sciences Springer India 125/6(2013-11-01), 1365-1374 0974-3626 125:6<1365 2013 125 12039 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer