Yu-Zhi Su

Fabrication of hierarchical flower-like super-structures consisting of porous NiCo2O4 nanosheets and their electrochemical and magnetic properties

In the present work, we demonstrate a facile and cost-effective strategy for synthesizing hierarchical flower-like super-structures consisting of porous NiCo2O4 nanosheets. The morphologies and surface areas of NiCo2O4 samples can be tailored by changing the reaction time. The synthesized NiCo2O4 samples are characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), powder X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and by using an accelerated surface area and porosimetry analyzer (ASAP 2020M). The NiCo2O4 samples exhibit high activity and superior cycling stabilities in ORR. In addition, the magnetic properties of NiCo2O4 samples are also studied in detail.

Double-Shelled CdS- and CdSe-Cosensitized ZnO Porous Nanotube Arrays for Superior Photoelectrocatalytic Applications.

The effective separation and transport of photoinduced electron-hole pairs in photoanodes is of great significance to photoelectrochemical and catalytic performance. Here, a facile and effective two-step strategy is developed to fabricate double-shelled ZnO/CdS/CdSe porous nanotube photoanodes from ZnO nanorod arrays (NRAs). Surprisingly, after the process of the deposition of CdS and CdSe, the ZnO nanorod arrays are partially dissolved, resulting in the formation of ZnO/CdS/CdSe porous nanotube arrays (NTAs). By virtue of their unique porous nanotube structure and cosensitization effect, the ZnO/CdS/CdSe porous NTAs show superior photoelectrochemical water-splitting performance and organic-pollutant-degradation ability under visible light irradiation, as well as excellent long-term photostability.

One-dimensional ZnO/Mn3O4 core/shell nanorod and nanotube arrays with high supercapacitive performance for electrochemical energy storage

One-dimensional (1D) ZnO/Mn3O4 core/shell nanorod arrays (NRAs) and nanotube arrays (NTAs) have been controllably synthesized via a facile electrochemical deposition process and characterized by X-ray diffraction, SEM, TEM, EDS, X-ray photoelectron spectroscopy, and electrochemical experiments. To assess the properties of 1D ZnO/Mn3O4 core/shell nanostructures for use in supercapacitors, cyclic voltammetry and galvanostatic charging–discharging measurements were performed. Remarkably, the ZnO/Mn3O4 core/shell NTAs electrode is found to exhibit 2.5 times higher capacitance, better rate performance and smaller inner resistance than the ZnO/Mn3O4 NRAs. These findings indicate that the novel 1D architectures offer a very promising design for supercapacitors.

Effect of Morphology of Co3O4 for Oxygen Evolution Reaction in Alkaline Water Electrolysis

In this paper, three different morphological Co3O4 electrodes for oxygen evolution reaction (OER) have been synthesized. By comparing the three morphologies of Co3O4, the electrocatalytic properties show that the urchin-like spheres of Co3O4 electrode has relative low overpotential and good electrocatalysis stability, indicating that the structure of urchin-like Co3O4 spheres exhibit an easy OER for water splitting.

Facile and Efficient Electrochemical Synthesis of Lanthanum Hydroxide Nanospindles and Nanorods

Herein, we report a template- and surfactant-free electrochemical approach for the preparation of La(OH) 3 nanospindles and nanorods on F-doped SnO 2 substrates. The morphology of the deposits is easily tuned by adjusting the concentration of dimethyl sulfoxide. Moreover, the as-synthesized products show an environmental engineering application due to their remarkable capability in removing organic dye from water.