Efficient oxygen evolution using conductive cobalt-based metal-organic framework

• Published in: Fuel (Guildford) Vol. 363; p. 131044
• Main Authors: Suliman, Munzir H., Tawfiq Alfuhaid, Lolwah, Khan, Abuzar, Usman, Muhammad, Helal, Aasif
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.05.2024
• Subjects: Co-BTB; Conductive MOF; Electrocatalyst; Oxygen evolution; Water splitting; Oxygen evolution; Co-BTB; Water splitting; Electrocatalyst; Conductive MOF
• ISSN: 0016-2361; 1873-7153
• DOI: 10.1016/j.fuel.2024.131044

[Display omitted] •The electrically conductive Cobalt- benzene-1,3,5-tricarboxylic acid metal–organic framework (Co-BTB) was easily synthesized using the hydrothermal process.•The CoBTB showed a low overpotential (only 170 mV to obtain 10 mA cm−2) for the oxygen evolution reaction (OER) surpassing the benchmark electrocatalyst IrO2.•The Co-BTB possesses good kinetics with an estimated Tafel slope of only 46.5 mV dec−1.•It provided a high density of catalytic centers with electrically conductive characteristics, as suggested by ECSA. The electrically conductive Cobalt-benzene-1,3,5-tribenzoate metal–organic framework (Co-BTB) was easily synthesized using the hydrothermal synthesis process. The framework showed a low overpotential (only 170 mV to obtain 10 mA cm−2) for the oxygen evolution reaction (OER) surpassing the benchmark electrocatalyst IrO2 which showed an overpotential of 250 mV at the same obtained current density. Moreover, the Co-BTB possesses good kinetics with an estimated Tafel slope of only 46.5 mV dec−1. It provided a high density of catalytic centers with electrically conductive characteristics, as suggested by ECSA. The framework was identified as a promising MOF electrocatalyst for the OER due to its performance as well as its chemical and electrochemical robustness.