Synthesis of β-graphdiyne-like film with terminal alkynyl bromine groups

B-Graphdiyne (B-GDY), as a classical two-dimensional carbon material with zero band gap, has become a prevailing topic within the field of carbon nanomaterials due to the potential applications in energy stor-age, organic electronics, etc. Thus, the explorations to synthesize high-performance B-GDY-based mate-rials and to reveal the relationship between their structures and properties are of great significance. In this work, we proposed a new strategy to prepare large-area B-GDY-like film on copper foil via the dehalogenative homocoupling reaction of a new monomer tetra(bromomethynyl)ethene (TBE). Due to the higher selectivity of the terminal alkynyl bromide functional groups, the reaction can proceed high-efficiently at room temperature. The configurations and nanostructures of as-synthesized film was well characterized by using SEM, TEM, Raman, FT-IR and XPS. Their hydrogen/oxygen evolution reac-tion (HER/OER) catalytic performances have been demonstrated.(c) 2023 Elsevier Ltd. All rights reserved.