Preparation, Characterization and Electrochemical Properties of La2CuO4@Au as a Novel Bifunctional Oxygen Electrode

Abstract

In this paper, a novel bifunctional oxygen electrode, La2CuO4@Au, was synthesized using the sol-gel method. Thermogravimetry differential thermal analysis (TG-DTA) was used to analyze the formation mechanism and crystallization temperature. The crystal structure and surface morphologies of La2CuO4 were determined by X-ray diffraction (XRD) and scanning electron microscope (SEM), respectively. The CV curves of 0.1M KOH electrolyte saturated with N2 and O2 showed that La2CuO4@Au had excellent catalytic activity for oxygen reduction reaction (ORR).

Enhancing Adrenaline Sensing with Lanthanum Cuprate: A Promising Approach for a Novel Sensor

“…Obtained macroporous "sponge-like" appearance is a common feature of rare-Earth cuprates. 35,36,38,40 EDS-elemental analysis of La 2 CuO 4 presented in Figs. 1C, 1D showed a uniform distribution of oxygen, copper, and lanthanum, which indicates the formation of a homogeneous and continuous phase.…”

“…High crystallinity is confirmed with average crystallite size to be 655(94) Å as calculated by the Holder-Wagner method. 35,41 Diffraction profile is attributed to layered perovskite oxide with the K 2 NiF 4 structure with unit cell parameters a = 5.363(5) Å, b = 5.409(5) Å, c = 13.17(1) Å.…”

“…23,24 Later lanthanide cuprates found application as a substrates for solid oxide fuel cells (SOFS), [25][26][27][28] photo-catalyst for water splitting 29,30 catalysts for basic organic synthesis, [31][32][33] electroactive material for oxygen reduction reaction. 34,35 Recent reports describe their utility as a gas sensors for nitrogen oxides and carbon monoxide. 36,37 Interestingly, only two reports is known so far about lanthanide cuprate utilization in electrochemical sensing.…”

Samarium Cuprate with Micron-Size Pores for Drug Sensing

“…Currently, there is growing interest in perovskite-like mixed oxides having the general formula LnxMOy, where Ln is a lanthanide element with a larger radius cation, M is a transition metal with a small radius cation [13,14], [15]. Perovskites, unlike individual metal oxides, are chemically stable, have high electrical conductivity, and good electrochemical characteristics [13,16].…”

“…Perovskites, unlike individual metal oxides, are chemically stable, have high electrical conductivity, and good electrochemical characteristics [13,16]. Because of the above properties, perovskites are widely used as electrodes in solid oxide fuel cells, photocatalysts, and high temperature superconducting materials [15,17,18].…”