Construction of Pd-doped RuO2 nanosheets for efficient and stable acidic water oxidation

• DOI: 10.1016/j.gee.2023.12.003
• Publication Date: 2023-12-13T09:21:33Z
• Authors: Yibo Liu; Xing Hu; Chenxi Liu; Shan Zhu; Kezhu Jiang; Feng Liu; Shijian Zheng
• Keywords: Overpotential; Nanosheet; Oxygen evolution

RuO2 has been considered a potential alternative to commercial IrO2 for the oxygen evolution reaction (OER) due its superior intrinsic activity. However, inherent structure dissolution in acidic environments restricts applications. In this study, we report novel Pd-doped ruthenium oxide (Pd-RuO2) nanosheet catalyst that exhibits improved activity and stability through synergistic effect of Pd modulation Ru electronic two-dimensional structure. The excellent performance, achieving an overpotential only 204 mV at current density 10 mA cm-2. Impressively, after undergoing 8000 cycles cyclic voltammetry testing, merely decreased by 5 mV. PEM electrolyzer with Pd0.08Ru0.92O2 as anode survived almost 130 h operation 200 To elucidate underlying mechanisms responsible enhanced stability, conducted X-ray photoelectron spectroscopy (XPS) analysis, which reveals electron transfer from effectively circumvents over-oxidation Ru, thus playing crucial role enhancing catalyst's stability. Furthermore, functional theory (DFT) calculations provide compelling evidence introduction into modulates correlations facilitates thereby preventing Ru. Additionally, application inhibited aggregation growth nanoparticles, further bolstering structural integrity catalyst.