| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5364902 | Applied Surface Science | 2012 | 4 Pages |
A S-terminated GaN(0Â 0Â 0Â 1) substrate covered with catalytically active Pd nanoparticles (PdNP) serves as a treatable and green chemical catalyst for various cross-coupling reactions. The role of S in the formation of PdNP has been studied so far, but the effect on the catalytic activity has not been investigated. In this study, we investigate the role of S-termination during the Mizoroki-Heck reaction from the view point of the stability of PdNP and the yield in repeated reactions. PdNP are formed on both S-terminated GaN(0Â 0Â 0Â 1) surface and non-terminated one, and their catalytic activities are compared when the quantity of PdNP is subminimal and excessive. It is found that S-termination serves as a binder of PdNP on GaN(0Â 0Â 0Â 1) surface, resulting in the self-regulation of PdNP leaching.
⺠A new application of S-terminated GaN surface, that is, palladium nanoparticles (PdNP) are deposited on the surface. ⺠The structure serves as a treatable and green chemical catalyst. ⺠The catalysts with or without S-termination are prepared to discuss the role of S termination in the fascinating catalytic activity. ⺠The catalytic activities of the samples are discussed by using the chemical conversions of repeated Mizoroki-Heck reactions. ⺠It was concluded that the S-termination acts as a stabilizing binder of PdNP on the surface.
