The fabrication of Au/Pd plasmonic alloys on UiO-66-NH2: an efficient visible light-induced photocatalyst towards the Suzuki Miyaura coupling reaction under ambient conditions

Satyabrata Subudhi; Sriram Mansingh; Suraj Prakash Tripathy; Ashutosh Mohanty; Priyabrat Mohapatra; Dharitri Rath; Kulamani Parida

doi:10.1039/C9CY01431D

The fabrication of Au/Pd plasmonic alloys on UiO-66-NH₂: an efficient visible light-induced photocatalyst towards the Suzuki Miyaura coupling reaction under ambient conditions†

Satyabrata Subudhi,

^a Sriram Mansingh,^a Suraj Prakash Tripathy,^a Ashutosh Mohanty,^b Priyabrat Mohapatra,^c Dharitri Rath^d and Kulamani Parida

*^a

Author affiliations

* Corresponding authors

^a Centre for Nano Science and Nanotechnology, Siksha “O” Anusnadhan (Deemed to be University), Bhubaneswar-751030, Odisha, India
E-mail: paridakulamani@yahoo.com, kulamaniparida@soauniversity.ac.in
Fax: +91 674 2350642
Tel: +91 674 2351777

^b Department of solid state and structural chemistry unit, IISc Bangalore-560012, India

^c Department of Chemistry, C.V. Raman College of Engineering, Bhubaneswar- 752 054, Odisha, India

^d Department of chemistry, Rajdhani College, Bhubaneswar-751003, Odisha, India

Abstract

Visible light harvesting by heterogeneous photocatalysts and their applications in organic transformation reactions for the synthesis of target molecules are quite demanding science in the current scenario. In this regard, herein, a novel metal (Au/Pd)-functionalized metal organic framework (UiO-66-NH₂) was synthesized to carry out the Suzuki–Miyaura coupling (SMC) reaction under visible light irradiation at ambient conditions. In order to justify the claim regarding the formation of alloys, crystallinity, morphology, particle size, proper separation of excitons, elemental content and their environment, various sensitive characterization techniques such as XRD, XPS, HRTEM, BET surface area and UV-vis analysis were employed. A mechanistic approach by means of experimental investigations revealed that the strong LSPR effect of Au facilitated the transfer of electrons to the Pd surface to make the surface negatively charged and suitable for the activation of aryl halides. The formed electropositive Au nanoparticles were converted to Au⁰ by accepting the photo-induced electrons from pristine UiO-66-NH₂ and made available only holes at VB for the activation of phenylboronic acid. Among all the synthesized photocatalysts (1 : 2), Au/Pd@UiO-66-NH₂ showed the highest activity (>99%) with TOF = 426 h⁻¹ in an EtOH/H₂O medium towards the SMC reaction, and the highest activity of this catalyst was supported by the electron gas model, LSPR effect (UV-vis) and active species separation (PL) analysis. The bimetallic noble nanoparticle-anchored UiO-66-NH₂ not only expands the synthesis scope of C–C coupling by the SMC reaction under ambient conditions but will also inspire the further exploration of the activation of various reactants towards a wide range of organic transformation reactions.

This article is part of the themed collection: 2019 Catalysis Science & Technology HOT Articles

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Article information

DOI: https://doi.org/10.1039/C9CY01431D
Article type: Paper
Submitted: 18 Jul 2019
Accepted: 30 Sep 2019
First published: 01 Nov 2019

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Catal. Sci. Technol., 2019,9, 6585-6597

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The fabrication of Au/Pd plasmonic alloys on UiO-66-NH₂: an efficient visible light-induced photocatalyst towards the Suzuki Miyaura coupling reaction under ambient conditions

S. Subudhi, S. Mansingh, S. P. Tripathy, A. Mohanty, P. Mohapatra, D. Rath and K. Parida, Catal. Sci. Technol., 2019, 9, 6585 DOI: 10.1039/C9CY01431D

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Catalysis Science & Technology