Highly Conductive Non-Calcined 2D Cu0.3Co0.7 Bimetallic–Organic Framework for Urea Electrolysis in Simulated Seawater
Year: 2024
Type: article
Abstract: Global clean energy demands can be effectively addressed using the promising approach of hydrogen energy generation combined with less energy consumption. Hydrogen can be generated, and urea-rich wastewater pollution can be mitigated in a low-energy manner using the urea oxidation reaction (UOR). This paper seeks to assemble a unique electrocatalyst of a pristine 2D MOF, [Co(HBTC)(DMF)] n (Co-MUM-3), from 1,3,5-benzenetricarboxylate (BTC) to oxidize urea in simulated seawater. Ni foam (NF)-based working electrodes were fabricated by incorporating a series of heterometallic CuCo-MUM-3 frameworks (Cu 0.1 Co 0.9 -MUM-3, Cu 0.2 Co 0.8 -MUM-3, Cu 0.3 Co 0.7 -MUM-3, and Cu 0.4 Co 0.6 -MUM-3), after which their application in the urea oxidation reaction was examined. A very low required overpotential [1.26 V vs reversible hydrogen electrode (RHE) in 1 M KOH + 0.5 M NaCl (simulated seawater) + 0.33 M urea] and a Tafel slope of 112 mV dec –1 could be observed for the Cu 0.3 Co 0.7 -MUM-3 electrocatalyst, ensuring the achievement of urea electro-oxidation and hydrogen evolution reactions at a corresponding 10 mA cm –2 electrocatalytic current density. A relatively lower overpotential will be evident compared to other reported pristine MOFs, outperforming the commercial catalyst RuO 2 (1.41 V at 10 mA cm –2, 131 mV dec –1 ) and ensuring considerable stability at significantly high current densities for a minimum of 72 h.
Source: Inorganic Chemistry
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: green
Award: G5370308969
OpenAlex ID: W4405632864