Thermal decomposition synthesis, characterization and electrochemical hydrogen storage characteristics of Co3O4–CeO2 porous nanocomposite

Synthesis of CeO2 nanoparticles with different morphologies and their properties as peroxidase mimic

“…Pt nanoparticles also own the capability of uric acid enzyme . These nanoparticles, playing the role of natural enzymes, have been widely used in the fields of immunoassay, determination of metal ions, target sensor, degradation of pollutants, hybridization of nucleic acids and organic synthesis …”

Sol-gel synthesis and characterization of Co3O4/CeO2 nanocomposites and its application for photocatalytic discoloration of organic dye from aqueous solutions

“…For CeO 2 , the bandgap on 2.72 (Fiorenza et al 2018), 3.57 (Maensiri et al 2007), and 3.35 eV (Sangsefidi and Salavati-Niasari 2017) and for Co 3 O 4 1.53 and 2.02 eV (Salavati-Niasari and Khansari 2014) and 2 and 3.2 eV (Soofivand and Salavati-Niasari 2015) are reported in the literature. For this nanocomposite, two band gaps estimated for Co 3 O 4 were 2.9 and 3.5 eV and the bandgap estimated for CeO 2 was 3.9 eV.…”

Fe2O3–CeO2 Ceramic Nanocomposite Oxide: Characterization and Investigation of the Effect of Morphology on Its Electrochemical Hydrogen Storage Capacity

“…In the charging process of the products (working electrode), electrolyte dissociates and products adsorb hydrogen atoms (physical adsorption). During this process, oxidation reaction occurs which leads to increased storage capacity in products . In the discharging process (under −1 mA), hydrogen atoms are released from the surface of the working electrode.…”

“…Hydrogen uptake measurements were performed by a standard three-electrode setup employing a counter electrode (Pt), a reference electrode (Ag/AgCl), and a working electrode (proposed nanocomposite oxide). The electrochemical hydrogen storage performance of the proposed nanocomposite oxide was evaluated as follows. , Briefly, the electrochemical setup was used at room temperature. The potential difference between the working electrode and the reference electrode was recorded by applying a constant current between the working electrode and the counter electrode.…”

“…Hydrogen can be stored in different forms: in the atomic form in a host lattice and in molecular form as free adsorbed molecules on the surface of compounds. The solid-state storage has attracted significant attention in the past decades, and various classes of compounds have been studied in this field. − These compounds include zeolites, clathrates, complex hydrides, metals and alloys, different oxides, , porous materials, metal organic frameworks (MOFs), and carbonaceous materials. , Each of these compounds stores hydrogen in one or two states; for example, in MOFs, it is stored in a molecular form, and in metals, it is stored as a hydride and a solid solution (or one or two solid solutions) . A certain class of these compounds (zeolites, MOFs, activated carbon, nanostructures, and nanocomposites) can have good advantages in the process of hydrogen storage. − In 1997, carbon nanotubes as a hydrogen absorbent were studied by Dylon et al in a hydrogen storage process .…”