Cobalt/Dihydroxybenzimidazole-Derived Amorphous MOF TAL-2 As a Single Precursor for Trifunctional ORR/Oer/HER Electrocatalyst Material

摘要

Preparation of cost-efficient noble metal-free multifunctional electrocatalyst materials with high performance and stability for oxygen evolution reaction (OER), oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) - referred to as trifunctional catalysts - remains an outstanding challenge. The catalyst material was prepared from amorphous metal-organic framework TAL-2, which was obtained from cobalt salt and dihydroxybenzimidazole and outperformed the benchmark catalysts in ORR and OER reactions (0.1 M KOH; ΔE = 0.73 V, AMFCs: j = 1100 mA cm~(-2), P = 400 mW cm~(-2)). Use of dopants or modifying conditions was unnecessary fot this material to be used as a trifunctional electrocatalyst.