TY  - JOUR
AU  - Hamza, Bashiru Ibrahim
AU  - Oguzie, Kanayo Lucy
AU  - Anyanwu, John Ojinere
AU  - Akalezi, Christogonus Oudney
AU  - Oguzie, Emeka Emmanuel
PY  - 2026
DA  - 2026/10/15
TI  - Electrocatalytic Enhancement of Formic Acid Oxidation Reaction by a Graphitic Carbon Nitride-Modified Glassy Carbon Electrode
JO  - Catalysis Research
SP  - 012
VL  - 06
IS  - 04
AB  - The formic acid oxidation reaction (FAOR) is a key anodic process in direct formic acid fuel cells and requires efficient electrocatalysts with high activity and resistance to catalyst poisoning. In this study, a graphitic carbon nitride (g-C3N4)-modified glassy carbon electrode (g-C3N4/GC) was fabricated and evaluated for FAOR in acidic media. The electrocatalytic performance of the modified electrode was investigated using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), chronoamperometry (CA), and atomic force microscopy (AFM). Compared with the bare glassy carbon electrode, the g-C3N4/GC electrode exhibited significantly enhanced electrocatalytic activity toward FAOR, characterized by substantially higher peak current densities, lower charge-transfer resistance, and improved long-term stability. EIS analysis revealed faster interfacial electron-transfer kinetics following surface modification, while CV studies indicated an increase in electrochemically active surface area and improved accessibility of catalytic sites. Chronoamperometric measurements further demonstrated enhanced durability and reduced activity loss during prolonged operation. The improved electrochemical performance is attributed to the nitrogen-rich structure, increased conductivity, and abundant active sites provided by g-C3N4. These findings demonstrate that g-C3N4-modified glassy carbon electrodes represent a promising metal-free electrocatalyst platform for formic acid electrooxidation and may contribute to the development of cost-effective direct formic acid fuel cell technologies.
SN  - 2771-490X
UR  - https://doi.org/10.21926/cr.2604012
DO  - 10.21926/cr.2604012
ID  - Hamza2026
ER  -