Supported Pbhfcd Electrocatalysts Over Carbon-Hydroxyapatite Composite Fabricated by Precipitation and Nabh4 Reduction Methods for Glucose Electrooxidation

Abstract

Fuel cells are one excellent option for converting energy through green technology. Due to its accessibility and high-energy density, glucose can be employed as a fuel in fuel cells. In this study, hydroxyapatite (HAp) was prepared by the precipitation method, and carbon-doped HAp supported PbHfCd (PbHfCd/C-HAp) composite electrocatalysts at varying metal ratios for the glucose electrooxidation were synthesized via NaBH4 reduction method. Inductively coupled plasma mass spectrometry (ICP-MS), scanning electron microscopy (SEM-EDX), X-ray diffraction analysis (XRD), elemental mapping, and transmission electron microscopy (TEM) were used to evaluate the chemical structure, crystallinity, and morphological characteristics of the PbHfCd/C-HAp. Chronoamperometry (CA), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) were utilized to scrutinize the electrocatalytic activity and stability of PbHfCd/C-Haps for glucose electrooxidation. The findings demonstrate that HAp enhances the glucose electrooxidation of PbHfCd alloy. With a specific activity of 4.73 mA/cm(2), Pb80Hf10Cd10/C-HAp is the most stable and active anode electrocatalyst in this work, outperforming HAp by 4.9 times.