Pd 2+ -conjugated reduced graphene oxide as a highly efficient visible-light-induced photocatalytic Suzuki-Miyaura coupling

Hyeon Ho Shin, Taejun Han, Wonseok Yang, Dong-Kwon Lim

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Abstract

In this work, we investigated Pd 2+ - and Pd 0 -loaded graphene oxide (GO) and reduced graphene oxide (r-GO) as water-soluble, visible-light-responsive photocatalysts for the Suzuki-Miyaura C-C coupling reaction. Nanosheets of r-GO (∼200 nm) were found to be a more desirable substrate than GO nanosheets, since the corresponding catalyst showed higher activities than those of the GO catalysts in both the visible-light-induced and thermal reactions. Furthermore, Pd 2+ -loaded GO and r-GO show higher catalytic activities than those of Pd 0 -loaded GO and r-GO because of the more efficient oxidative addition to Pd 2+ compared with that to Pd 0 . Systematic studies under dark and light conditions demonstrated the synergic contributions of photoexcited electron transfer and the strong photothermal effect of r-GO. Pd 2+ - and Pd 0 -loaded r-GO show four-times higher photocatalytic activities compared to those of Pd 0 -MoS 2 and Pd 0 -WS 2 catalysts for the Suzuki-Miyaura C-C coupling reaction.

Original languageEnglish
Pages (from-to)362-370
Number of pages9
JournalCarbon
Volume143
DOIs
Publication statusPublished - 2019 Mar 1

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Oxides
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Photocatalysts

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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Pd 2+ -conjugated reduced graphene oxide as a highly efficient visible-light-induced photocatalytic Suzuki-Miyaura coupling . / Shin, Hyeon Ho; Han, Taejun; Yang, Wonseok; Lim, Dong-Kwon.

In: Carbon, Vol. 143, 01.03.2019, p. 362-370.

Research output: Contribution to journalArticle

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abstract = "In this work, we investigated Pd 2+ - and Pd 0 -loaded graphene oxide (GO) and reduced graphene oxide (r-GO) as water-soluble, visible-light-responsive photocatalysts for the Suzuki-Miyaura C-C coupling reaction. Nanosheets of r-GO (∼200 nm) were found to be a more desirable substrate than GO nanosheets, since the corresponding catalyst showed higher activities than those of the GO catalysts in both the visible-light-induced and thermal reactions. Furthermore, Pd 2+ -loaded GO and r-GO show higher catalytic activities than those of Pd 0 -loaded GO and r-GO because of the more efficient oxidative addition to Pd 2+ compared with that to Pd 0 . Systematic studies under dark and light conditions demonstrated the synergic contributions of photoexcited electron transfer and the strong photothermal effect of r-GO. Pd 2+ - and Pd 0 -loaded r-GO show four-times higher photocatalytic activities compared to those of Pd 0 -MoS 2 and Pd 0 -WS 2 catalysts for the Suzuki-Miyaura C-C coupling reaction.",
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AU - Shin, Hyeon Ho

AU - Han, Taejun

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AU - Lim, Dong-Kwon

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N2 - In this work, we investigated Pd 2+ - and Pd 0 -loaded graphene oxide (GO) and reduced graphene oxide (r-GO) as water-soluble, visible-light-responsive photocatalysts for the Suzuki-Miyaura C-C coupling reaction. Nanosheets of r-GO (∼200 nm) were found to be a more desirable substrate than GO nanosheets, since the corresponding catalyst showed higher activities than those of the GO catalysts in both the visible-light-induced and thermal reactions. Furthermore, Pd 2+ -loaded GO and r-GO show higher catalytic activities than those of Pd 0 -loaded GO and r-GO because of the more efficient oxidative addition to Pd 2+ compared with that to Pd 0 . Systematic studies under dark and light conditions demonstrated the synergic contributions of photoexcited electron transfer and the strong photothermal effect of r-GO. Pd 2+ - and Pd 0 -loaded r-GO show four-times higher photocatalytic activities compared to those of Pd 0 -MoS 2 and Pd 0 -WS 2 catalysts for the Suzuki-Miyaura C-C coupling reaction.

AB - In this work, we investigated Pd 2+ - and Pd 0 -loaded graphene oxide (GO) and reduced graphene oxide (r-GO) as water-soluble, visible-light-responsive photocatalysts for the Suzuki-Miyaura C-C coupling reaction. Nanosheets of r-GO (∼200 nm) were found to be a more desirable substrate than GO nanosheets, since the corresponding catalyst showed higher activities than those of the GO catalysts in both the visible-light-induced and thermal reactions. Furthermore, Pd 2+ -loaded GO and r-GO show higher catalytic activities than those of Pd 0 -loaded GO and r-GO because of the more efficient oxidative addition to Pd 2+ compared with that to Pd 0 . Systematic studies under dark and light conditions demonstrated the synergic contributions of photoexcited electron transfer and the strong photothermal effect of r-GO. Pd 2+ - and Pd 0 -loaded r-GO show four-times higher photocatalytic activities compared to those of Pd 0 -MoS 2 and Pd 0 -WS 2 catalysts for the Suzuki-Miyaura C-C coupling reaction.

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