A supported polymeric organic framework composed of dual electrocatalytically active sites for high-performance carbon dioxide electroreduction

Abstract

Electrocatalytic reduction of CO2 to CO and other sustainable fuels presents an attractive approach to alleviate energy crises and environmental problems. Carbon nanotubes (CNTs) hybridization and the incorporation of dual...

Cascade Electrocatalytic Reduction of Nitrate to Ammonia Using a Heterobimetallic Covalent Organic Framework Composed of Cu-Porphyrin and Co-Bipyridine

“…The valence states of the metal ions were further investigated via X-ray photoelectron spectroscopy (XPS). With CuP-CoBpy as an example, the high-resolution Cu 2p spectra with five peaks can be ascribed to Cu 2p 3/2 at 934.9 eV and Cu 2p 1/2 at 954.8 eV and the satellite of Cu 2+ at 941.7, 944.4, and 963.2 eV, respectively (Figure e). , For comparison, the high-resolution Co 2p spectrum presents two characteristic binding energies of 2p 3/2 and 2p 1/2 at 781.1 and 796.6 eV, respectively (Figure f), confirming the presence of the Co 2+ ion. − Unlike that of CuP-Bpy, the high-resolution N 1s spectra of CuP-CoBpy exhibit an additional peak at 398.7 eV, alongside the pyridine N peak at 398.6 eV, the pyrrole N peak at 399.2 eV, and the secondary N peak at 400.0 eV (Figure g) . This characteristic peak is associated with coordination of pyridine N to cobalt ions.…”

Engineering organic polymers as emerging sustainable materials for powerful electrocatalysts

“…139,284 For instance, an organic–inorganic hybrid material was synthesized by using template-directed in situ polymerization. 155 Ultrathin COP layers with distinct Co( ii ) porphyrin and Co( ii ) bipyridine sites are integrated onto a CNT scaffold. In the CO 2 -to-CO electrocatalytic conversion, this synthesized material demonstrated a significant increase in reduction current density caused by the CO 2 RR.…”

Metal-free corrole-based donor–acceptor porous organic polymers as efficient bifunctional catalysts for hydrogen evolution and oxygen reduction reactions

“…Additionally, POPs have the advantages of high surface areas, tunable porosities, low densities, variable compositions, abundant chemical reaction channels/active centers and long range π-conjugation. 1–5 These fascinating structural properties make POPs widely used in the fields of electrocatalysis (such as the hydrogen evolution reaction (HER) and the oxygen reduction reaction (ORR)), 6–9 energy storage, 10,11 gas adsorption and separation, 12,13 etc .…”