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    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/129/11/1661-1669

    • Keywords

       

      Ag-plasmon; visible light irradiation; chemoselective hydrogenation; bimetallic; mesoporous silica.

    • Abstract

       

      Silver-based bimetallic Pd/Ag plasmonic catalysts supported on mesoporous silica catalyze the chemoselective reduction of nitrostyrene (NS) to aminostyrene (AS). Ammonia borane (AB) is used as a mild reducing agent to generate H₂ in situ on the surface of exposed Ag and Pd atoms for −NO₂ reduction at room temperature and atmospheric pressure. Systematic studies on the effect of nanoparticles (NPs) size are performed in dark and under light irradiation conditions. The spherical yellow colored bimetallic Pd/Ag/SBA-15(Y) exhibited maximum AS conversion of 89% at 90 min under visible light irradiation. The catalysts display higher selectivity under visible light irradiation which can be due to the efficient adsorption and transfer ofH⁺ /H⁻ pair to the polar bonds in the nitro group.

    • Author Affiliations

       

      PRIYANKA VERMA1 MIRIAM NAVLANI-GARCÍA1 YASUTAKA KUWAHARA1 2 KOHSUKE MORI1 2 3 HIROMI YAMASHITA1 2

      1. Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Japan
      2. Unit of Elements Strategy Initiative for Catalysts and Batteries, Kyoto University, Katsura, Kyoto 615-8520, Japan
      3. JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama, Japan

    • Dates

       
      Published
      20 November 2017
      Manuscript received
      12 April 2017
      Manuscript revised
      14 July 2017
      Accepted
      17 July 2017

    • Supplementary Material

       

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