A hydrogen evolution reaction determination system integrated high electrocatalyst palladium nano-electrode ensemble

Abstract

The aim of this work is to develop a high electrocatalyst system for hydrogen evolution utilizing palladium electrode ensemble (Pd-NEE). The work proposes a novel fabrication process to fabricate Pd-NEE using electroless deposition of Pd in a thin porous polycarbonate (PC) film for high performance electrochemical detection. Scanning electron microscopy (SEM) in conjunction with energy dispersive X-ray spectroscopy (EDS) are used to characterize the morphology and composition of Pd-NEE. It shows the best performance for hydrogen evolution reaction on Pd-NEE than other electrodes including bulk Pd, bulk Au and gold nanoelectrode ensemble. The Pd-NEE has a linear peak current response of the removal of adsorbed hydrogen over the tested sample concentration range. The effect of scan rate for voltammetric analysis is investigated. It is found that peak currents decrease as the scan rate from 0.5–0.05 V/s, but increase as the scan rate is lower than 0.05 V/s. It is demonstrated that hydrogen absorption and desorption on Pd-NEE is faster than that on other materials. A high electrocatalyst system is developed for hydrogen evolution reaction (HER).