Highly efficient overall water splitting performance of gadolinium‐indium‐zinc ternary oxide nanostructured electrocatalyst
P. Ilanchezhiyan, G. Mohan Kumar, S. Tamilselvan, Tae Won Kang, Deuk Young Kim
Abstract
Metal oxide nanostructures gain specific interest for bifunctional electrocatalytic functions in efficient water splitting reactions. From this perspective, Gd-In-Zn-based ternary oxides were solution processed and studied for oxygen and hydrogen evolution activities under different pH alkaline media. The nanostructure morphology was ascertained using high-power analytical tools such as scanning and transmission electron microscopes. Signals obtained from X-ray diffraction data revealed the prevalence of Gd2O3 phase in ternary oxide. Valence state of Gd, In, and Zn ions and their oxide traits was examined using X-ray photoelectron spectroscopy. Ternary oxides of Gd-In-Zn showcased their overall potential for water splitting applications. Overpotential (η) for oxygen and hydrogen (OER/HER) evolution reactions was recorded to be 282 and 271 mV for ±10 mA/cm2. The results demonstrated the processed oxide as an effective OER/HER electrocatalyst with profound Tafel slopes (121/64 mV/dec for OER/HER) and excellent long-term stability.