Single-atom iodine anchored layered graphitic carbon nitride: Dual functional Electrocatalyst for acetaminophen detection and oxygen evolution reaction

• Published in: Diamond and related materials Vol. 147; p. 111275
• Main Authors: Vasu, Dhanapal, Abraham, Leggins, Pichumani, Moorthi, Liu, Yung-Chieh, Lin, Xin-Yu, You, Yu-Feng, Chiu, Te-Wei
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-08-2024
• Subjects: Electrochemical sensor; Energy evolution; gCN; OER; Energy evolution; gCN; Electrochemical sensor; OER
• ISSN: 0925-9635; 1879-0062
• DOI: 10.1016/j.diamond.2024.111275

Developing highly effective bifunctional electrocatalysts for acetaminophen (ACP) detection and oxygen evolution reaction (OER) is significant and challenging. Thermal decomposition methods were used to create a high-radius and high electronegative iodine doped porous graphitic carbon nitride (IO-gCN) bifunctional electrocatalyst in here. The synergistic effect of pores nature, active sites and nanosheet-like structure, IO-gCN exhibit better ACP detection and OER activity. Under optimized conditions, IO-gCN detection limits (LOD) for ACP is 4.6 nM with a linear range of 0.2–80 μM and sensitivity is 3.234 μA μM−1 cm−2. The proposed nanosheets decorated disposable screen-printed carbon electrode (SPCE) also applied real samples (tap water and human urine sample) to obtained better recovery results. The electrochemical linear sweep voltammetry (LSV) exhibited a lower over potential (270 mV) and small Tafel slope value (144 mV/dec) at 10 mA/cm2 for IO-2 (2 wt% doped gCN) nanosheets under alkaline medium (1 M KOH). Additionally, the chronoamperometry (CA) test and the cyclic voltammetry 3000th cycle test both produced results for long-term stability and hybrid stability. This study offers a straightforward and esoteric method for creating bifunctional electrocatalysts that are free of metal.
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•IO-gCN nanosheets obtained using thermal decomposition process•IO-gCN have better physio-chemical properties•Better LOD values with higher sensitivity for ACP detection•Higher OER activity under alkaline condition•Single atom surface modifications accelerate charge carriers transfer and separation