Electrochemical Synthesis of Ni-based MOFs

All reagents were used as received without further purification. Nickel chloride hexahydrate (NiCl₂·6H₂O), pyrazine, pyrimidine, 4,4-bipyridine, ethanol (≥ 99.7%), N,N-dimethylformamide, methanol, 2,2,2-trifluoroethanol, 2-phenylethanol, 1-propanol, 3-propanol, furfural, 1,4-butanediol, 1,6-hexanediol, ethylamine, 1-phenylethylamine, cyclohexanol, cyclohexylamine, 1-propylamine, 2-aminoethanol, urea, glycerol, glucose, 5-hydroxymethylfurfural (5-HMF), ethylene glycol and 1-hexanethiol were all purchased from Aladdin Industrial Corporation (China). Potassium hydroxide (KOH) was purchased from Sinopharm Chemical Reagent Co., Ltd. (China). 1,1,1-trifluoro-2-propanol, 1-phenylethanol, benzaldehyde and 2-propylamine were purchased from Innochem Alfa Acros (China). Methyl mercaptan was purchased from Macklin Biochemical Co., Ltd. (China). 2,2,2-trifluoroethylamine and benzylamine were purchased from Shanghai Titan Scientific Co., Ltd. (China). Ultrapure deionized water (18.2 MΩ·cm⁻¹, 25 ^oC) was obtained from ELGA purification system (China). Anion exchange membrane was obtained from Fumatech (FAB-PK-130, Germany). Carbon fiber paper was purchased from Hesen Electric Co., Ltd. (HCP020N, China).