Controlled Hierarchical Dehydrogenation Reactions on Au(111)

Abstract

X–H (X = N, C, O...) bonds are abundant among organic precursors; controllable scission of hydrogenation atoms with high selectivity, therefore, has acquired extensive interest. In this study, we successfully realized hierarchical dehydrogenation reactions on an inert Au(111) surface. With the introduction of Fe atoms, N–H bond activation takes place at 450 K, and C–H bond activation occurs at 660 K. The large temperature window leads to excellent reaction selectivity. Moreover, each dehydrogenation step is monitored in real space by means of scanning tunneling microscopy since the forming intermediate states are stabilized by metal–organic bonds. This work provides a new strategy for controlled hierarchical dehydrogenation reactions.

Anisotropic Strain-Mediated Growth of Monatomic Co Chains on Unreconstructed Regions of the Au(111) Surface

“…μ H is the chemical potential of H, which can be obtained from half the energy of H 2 . The calculated dehydrogenation energy is 1.13 eV, which is consistent with the typical energy required for dehydrogenation in numerous organic molecules adsorbed on Au(111) surfaces . This indicates that the dehydrogenation reaction could occur in accordance with experimental observations.…”

“…The calculated dehydrogenation energy is 1.13 eV, which is consistent with the typical energy required for dehydrogenation in numerous organic molecules adsorbed on Au(111) surfaces. 39 This indicates that the dehydrogenation reaction could occur in accordance with experimental observations. Upon deposition on Au(111) held at 373 K, dehydrogenated 8OH-TPB molecules aggregate into a closely packed 2D island.…”