FECO WITH N-DOPED CARBON HETEROSTRUCTURE FOR TRIFUNCTIONAL ELECTROCATALYST IN OXYGEN REDUCTION REACTION, OXYGEN EVOLUTION REACTION, AND HYDROGEN EVOLUTION REACTION

• Main Author: Adinata Tan, Davin
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/73809
• Institution: Institut Teknologi Bandung

Electrocatalyst is one of the main components for zinc-air battery and water splitting. The role of electrocatalyst in both systems is to improve the kinetic of reaction for Oxygen Reduction Reaction (ORR), Oxygen Evolution Reaction (OER), and Hydrogen Evolution Reaction (HER). Pt, Ir, and Ru are available as the commercial electrocatalyst for these reactions. However, limit in supply causes the price for these metals to be expensive. Hence, this research aims to modify FeCo based catalyst’s structure to obtain N-doped carbon with nanobrush structure (FeCo-NB) with higher surface area. Synthesis of the electrocatalyst was done by producing nitrilotriacetic acid (NTA) based metal organic framework (MOF). Afterward, pyrolysis was done to the MOF with the addition of melamine to obtain the desired product. The electrocatalyst showed promising performance in ORR, OER, and HER. In ORR, the catalyst achieved an onset potential of 1.046 V with saturated current density of -5.38 mA/cm2. In OER, it showed an overpotential of 363 mV. In HER, it showed an overpotential of -254 mV. The electrocatalyst was then used to make zinc-air battery and achieved an open circuit voltage (OCV) of 1.48 V, the power density reached 195 mW/cm2, and the stability test revealed that the battery was stable throughout the entire 1000 charge – discharge cycle. In water splitting, the system needed 1.51 V of potential in order to reach 10 mA/cm2 of current density. With these performances, it is anticipated that the catalyst might replace the commercial catalysts as a trifunctional electrocatalyst.