Development of a Recyclable and Low-Leaching Palladium Catalyst Supported on Sulfur-Modified Gallium Arsenide (001) for Use in Suzuki-Miyaura Coupling

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 atom-economical perspective. Two heterogeneity tests clarify that the presence of immobilized palladium on S-GaAs is important for higher catalytic activity.