Electrifying Adipic Acid Production: Copper‐Promoted Oxidation and C−C Cleavage of Cyclohexanol

Abstract

Adipic acid is a central platform molecule for the polymer industry. Production of adipic acid with electroreforming technology is more sustainable compared to the thermochemical synthesis route. We discovered that incorporation of Cu 2 + into a Ni hydroxide lattice significantly improved the electrocatalytic oxidation of cyclohexanol into adipate with a high yield (84 %) and selectivity (87 %). This Cu promotion effect serves as a mechanistic probe that can be combined with product analysis, steady-state kinetics, and in situ spectroscopy. A two-electron oxidation into cyclohexanone first occurs, followed by consecutive hydroxylation and CÀ C cleavage before dione formation. The central role of Cu 2 + is to weaken the interaction between the NiOOH and surface-adsorbed O-centered radical that facilitates subsequent CÀ C cleavage. This enables a highly efficient two-electrode system capable of electroreforming KA oil into adipate and pure H 2 .

Electrosynthesis of Amides through Cu- and Co-Incorporated Nickel Hydroxide-Catalyzed Oxidation of Primary Amines Coupled with Hydrogen Evolution

“…The XPS fitting results of the Ni 2p high-resolution spectrum (Figure S4) showed that the signals of 855.06 and 872.66 eV belonged to the Ni 2+ peaks of Ni 2p 3/2 and Ni 2p 1/2 , respectively; 856.55 and 874.15 eV correspond to the Ni 3+ peaks of Ni 2p 3/2 and Ni 2p 1/2 , while the rest are satellite peaks. , After doping with Cu and Co, the peak area ratio of Ni 3+ /Ni 2+ increased significantly compared to that of Ni(OH) 2 (Table S1). In the XPS fine spectrum of Cu 2p (Figure c), CuCo–Ni(OH) 2 showed the Cu + and Cu 2+ metal peak signals at 932.05 and 934 eV for Cu 2p 3/2 . Compared to Cu–Ni(OH) 2 , the peak area ratio of Cu + in CuCo–Ni(OH) 2 was decreased, indicating that Cu and Co and Co jointly share the electron transfer from Ni.…”

Recent progress in thermally activated delayed fluorescence dendrimers for solution‐processed organic light‐emitting diodes

“…Subsequently, Wang et al attached triphenylphosphine oxide (TPPO) units to the TRZ acceptor to boost the electron‐transporting ability of the dendrimers 16 . As a result, the resultant dendrimers, CzTAZPO and sCzTAZPO, supported their devices with slow efficiency roll‐off and high EQEs of 12.6% and 9.1%, respectively.…”