POS6-1552
Cobalt Hydroxide-Decorated Polyaniline on Nickel Foam for Efficient Oxygen Evolution Reaction
When and Where
Nov 30, -0001
00:00 - 00:00
Room 301 (Grand Ballroom)
Presenter(s)
Animesh Roy (Advanced Technology Research Centre, Korea University of Technology and Education, Cheonan, Chungnam, 31253, Republic of Korea)
Co-Author(s)
Abstract
The development of efficient and earth-abundant electrocatalysts for the oxygen evolution reaction (OER) is crucial for advancing sustainable hydrogen production through water electrolysis. In this work, a cobalt hydroxide-decorated polyaniline (Co(OH)2/PANI) hybrid electrode was successfully fabricated on nickel foam via a sequential electrodeposition strategy. Initially, a conductive polyaniline (PANI) layer was electrochemically deposited onto nickel foam to provide a highly conductive framework. Subsequently, Co(OH)2 nanosheets were electrodeposited onto the PANI-coated substrate, forming a hierarchical hybrid architecture. The morphology and electrochemical performance of the prepared electrode were systematically investigated in alkaline electrolyte. The Co(OH)2/PANI hybrid electrode exhibited significantly enhanced OER activity compared with the individual components, delivering a low overpotential of 277 mV at a current density of 10 mA cm-2. The improved catalytic performance is attributed to the synergistic interaction between the conductive PANI framework and the abundant electroactive Co(OH)2 nanosheets, which facilitates rapid electron transport, increases the electrochemically active surface area, and promotes efficient charge-transfer kinetics during oxygen evolution. These results demonstrate that the rational integration of conductive polymers with transition-metal hydroxides provides an effective strategy for developing high-performance, low-cost OER electrocatalysts. The Co(OH)2/PANI hybrid electrode shows considerable promise for future alkaline water electrolysis and renewable energy conversion applications.
