121st General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code MAT.P-409
Subject Pd2+/Pd0-Loaded Reduced Graphene Oxide Complex for Highly Efficient Visible-Light Induced Photocatalytic Suzuki-Miyaura C-C Coupling Reaction
Authors Hyeon Ho Shin, Taejun Han, DONGKWON LIM*
KU-KIST Graduate School, Korea University, Korea
Abstract Developing visible-light induced photocatalyst is promising strategy to overcome the low catalytic activity of heterogeneous active catalyst for a reaction. To obtain the light energy from the sun, we need to use the suitable material that can absorb visible-light as a co-catalyst to increase the overall performance of active catalyst. In this work, we investigated that Pd2+ or Pd0-loaded graphene oxide (GO) or reduced graphene oxide (r-GO) complex as a water soluble visible-light responding photocatalyst for Suzuki-Miyaura C-C coupling reaction. We found two interesting results. The use of r-GO nanosheet (ca. 200 nm) is more desirable substrate than GO for C-C coupling reactions since it showed higher catalytic activity than that of GO in a visible-light induced reaction and thermal reaction as well. Among Pd2+ or Pd0 NPs as an active catalyst, Pd2+-loaded GO or r-GO shows higher catalytic activity compare with that of Pd0 nanoparticle loaded GO or r-GO because of an efficient oxidative addition reaction of Pd2+ compare to Pd0. The systemic studies in the dark or light-induced reaction conditions indicate the synergic contributions of photoexcited electron transfer process and strong photothermal effect of r-GO. Among other 2D-nanomaterials (i.e., MoS2, WS2) that can harvest visible-light, Pd2+/Pd0-loaded r-GO showed 4 times higher photocatalytic performance compared with Pd0-MoS2 or Pd0-WS2 catalyst for Suzuki-Miyaura C-C coupling reaction.
E-mail sinhh10@gmail.com