High-Performance Ag-Decorated Schiff-Base Covalent Triazin Framework as an Efficient Electrocatalyst for Hydrogen Evolution Reaction

Abstract

Developing efficient and affordable electrocatalysts for the hydrogen evolution reaction (HER) is essential for advancing sustainable energy technologies. In this study, a high-performance covalent triazine-based framework supported Ag nanoparticle (CTF@Ag) was synthesized through a condensation reaction. The electrocatalyst was analyzed using Fourier-transform infrared spectroscopy, X-ray diffraction spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and nitrogen absorption and desorption analysis. The electrocatalytic behavior of the structures in HER was investigated by linear sweep voltammetry, cyclic voltammetry, electrochemical impedance spectroscopy, and chronoamperometry in 0.5 M H₂SO₄. Results showed an onset overpotential of −46 mV (vs RHE), a low overpotential of −169 mV at a current density of 10 mA cm^–2, and a relatively high exchange current density of 0.37 mA/cm². The electrocatalytic activity of the CTF@Ag remained stable after 10 h, and even after 1000 consecutive cycles, the polarization curve characteristics were maintained, indicating the high stability of the electrocatalyst. The electrochemical analysis reveals that the synergistic effect between Ag nanoparticles and the CTF significantly improves the electron transfer. This work highlights the potential of CTF@Ag as a promising candidate for efficient hydrogen production through water splitting.