Ir-Pd/CNT Modifiye Elektrotlarla Triptofan Tespiti için Hassas Bir Elektrokimyasal Sensörün Geliştirilmesi

In this study, a novel carbon nanotube-supported bimetallic Iridium-Palladium (Ir-Pd) catalyst, denoted as Ir(50%)-Pd(50%)/CNT, was successfully synthesized using the sodium borohydride reduction method for the electrochemical detection of L-Tryptophan (L-Trp). The catalyst was characterized using Elemental Dispersion X-ray (EDX-SEM) and X-ray Diffraction (XRD) techniques, confirming the effective dispersion of Ir and Pd nanoparticles on the carbon nanotube surface. Electrochemical performance was evaluated using Cyclic Voltammetry (CV), Differential Pulse Voltammetry (DPV), and Electrochemical Impedance Spectroscopy (EIS) to optimize the sensor's detection capabilities. The resulting Ir-Pd/CNT/GCE sensor demonstrated a linear response over the concentration range of 100-1000 µM, and an exceptional limit of detection (LOD) of 0.02 µM at a signal-to-noise ratio (S/N) of 3. These findings indicate the potential of the Ir-Pd/CNT/GCE sensor for highly sensitive L-Trp detection in various applications, including biomedical, environmental, and food monitoring. This study emphasizes the promising role of bimetallic catalysts in enhancing the performance of electrochemical sensors for amino acid detection.