Cnt-Supported Multi-Metallic (Ga@pdagco) Anode Catalysts: Synthesis, Characterization, and Glucose Electrooxidation Application

Abstract

Here, Ga@PdAgCo catalysts were prepared by sequential reduction using carbon nanotubes (CNT) as support material. The catalysts at different weight percentages were characterized by inductively coupled plasma-mass spectrometry (ICP-MS), transmission electron microscopy (TEM), x-ray photoelectron spectroscopy (XPS), and x-ray diffraction (XRD) analytical techniques. Chronoamperometry (CA), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) measurements were applied to examine the glucose electrooxidation performance of the catalysts. Among the catalysts, the 7% Ga@PdAgCo(CNT) multi-metallic catalyst provided the best mass activity and specific activity of 231.08 mA/mg Pd and 2.475 mA/cm(2), respectively. EIS results revealed that the 7% Ga@PdAgCo(CNT) catalyst has a faster electron transfer rate with low (632 omega) charge transfer resistance (Rct). Consequently, the 7% Ga@PdAgCo(CNT) catalyst stands out as a potential anode catalyst for direct glucose fuel cells.