Development of a recyclable and low-leaching palladium catalyst supported on sulfur-modified gallium arsenide (001) for use in Suzuki-Miyaura coupling

Abstract

A newly developed, environmentally benign palladium catalyst supported on gallium arsenide, {Pd}-S-GaAs (001), has both the lowest recorded leaching and high recyclability for Suzuki- Miyaura coupling. Measurements of the catalyst surface by synchrotron radiation X-ray photoelectron spectroscopy show a relationship between the surface and the activity of the catalyst. Since {Pd}-S-GaAs(001) makes efficient use of the rare metal Pd, it is a useful palladium catalyst from an atomeconomical perspective. Two heterogeneity tests clarify that the presence of immobilized palladium on S-GaAs is important for higher catalytic activity. © 2009 Wiley-VCH Verlag GmbH& Co. KGaA, Weinheim.