Visible to near-infrared plasmon-enhanced catalytic activity of Pd hexagonal nanoplates for the Suzuki coupling reactionElectronic supplementary information (ESI) available: Detailed synthesis and the formation mechanism of Pd hexagonal nanoplates, synthesis of Pd octahedra and cubes, characterization, calculation of the total number of surface Pd atoms, instrumentation of the Suzuki coupling reactions, iodobenzene conversion yield in the Suzuki coupling reactions, time-dependent temperature pro

• Main Authors: Trinh, T. Thuy, Sato, Ryota, Sakamoto, Masanori, Fujiyoshi, Yoshifumi, Haruta, Mitsutaka, Kurata, Hiroki, Teranishi, Toshiharu
• Format: Journal Article
• Language: English
• Published: 16.07.2015
• ISSN: 2040-3364; 2040-3372
• DOI: 10.1039/c5nr03841c

Photocatalytic conversion of solar energy to chemical energy is an efficient process in green chemistry because it facilitates room temperature chemical transformations by generating electronically excited states in photocatalysts. We report here on the robust synthesis, detailed structural characterization, and especially photocatalytic properties of plasmonic Pd hexagonal nanoplates for chemical reactions. The Pd hexagonal nanoplates are twin crystals, and composed of the top and bottom faces enclosed by the {111} planes with stacking faults and the side surfaces bound by mixed six {111} and six {100} planes. The Pd hexagonal nanoplates with well-defined and tunable longitudinal localized surface plasmon resonance (LSPR) have enabled the direct harvesting of visible to near-infrared light for catalytic cross coupling reactions. Upon plasmon excitation, the catalytic Suzuki coupling reactions of iodobenzene and phenylboronic acid accelerate by a plasmonic photocatalytic effect of plasmon induced hot electrons. The turnover frequency (TOF) of the Pd hexagonal nanoplates in a reaction illuminated with a λ = 300-1000 nm Xenon lamp at 176 mW cm −2 was 2.5 and 2.7 times higher than that of non-plasmonic {111}-enclosed Pd nanooctahedra and {100}-enclosed Pd nanocubes, respectively, and 1.7 times higher than the TOF obtained when the reaction was thermally heated to the same temperature. Palladium hexagonal nanoplates with tunable longitudinal localized surface plasmon resonance enable the direct harvesting of visible to near-infrared light for catalytic cross coupling reactions through a plasmonic photocatalytic effect.