Formaldehyde-assisted hydrothermal synthesis of one-dimensional CeO2 and their morphology-dependent properties

Surface engineering on CeO2 nanorods by chemical redox etching and their enhanced catalytic activity for CO oxidation

“…[9,18,33,34] Herein, CO oxidation reaction is chosen as a model reaction to assess the influence of the surface properties of the etched CeO 2 nanorods on their catalytic activity. [22,35,36] Obviously, the surface Ce 3+ fraction and the concentration of oxygen vacancies can significantly affect their catalytic activity, thus CO oxidation is a suitable model reaction to assess the changes of surface properties induced by redox chemical etching process on their catalytic activity. [22,35] The surface Ce 3+ sites play a crucial role in the absorption of CO molecules.…”

“…Oxygen vacancies are generated accompanied by the release of CO 2 , and then react with gas-phase oxygen to re-produce surface oxygen atoms. 22,35,36 Obviously, the surface Ce 3+ fraction and the concentration of oxygen vacancies can significantly affect their catalytic activity, thus CO oxidation is a suitable model reaction to assess the changes of surface properties induced by the redox chemical etching process on their catalytic activity.…”

A facile synthesis for hierarchical porous CeO2 nanobundles and their superior catalytic performance for CO oxidation

“…CeO 2 nanorods and nanowires were prepared by a hydrothermal method and used as comparative reference samples. 26 Typically, 1.0 g of cerium(III) nitrate hexahydrate was dissolved in 30 ml formalin solution, and then 1.0 or 2.1 g of sodium hydroxide or potassium hydroxide was slowly added to mixed solution under vigorous stirring. Then, the suspended solution was transferred into a 40 ml Teon-lined stainless autoclave and heated at 120 or 100 C for 20 h in an electric oven.…”

“…18,19 Recent advances in the morphology-controlled synthesis of the nanomaterials offer new opportunities of developing novel CeO 2 functional materials with desired structural properties. It has been reported that numerous morphologies of cerium oxides, such as nanorods, 20,21 nanowires, 22,23 nanotubes, 24,25 nanobelts 26,27 and other morphologies, [28][29][30][31][32][33][34] are synthesized by chemical and physical methods. The nanomaterials with these morphologies show their positive properties and their potential applications.…”

Morphology‐Controllable Preparation of CeO2 Materials for CO2 Adsorption

“…Lykhach [13,14] also found that CeO 2 activation led to the rapid formation of carbonate and surface carboxylates. Meanwhile, various 1D and 2D CeO 2 nanostructures, [15][16][17] including nanorods, [18] nanowires, [19] nanotubes, [20,21] nanobelts [22,23] and other morphologies [24][25][26][27][28] had been synthesized via the thermal decomposition of CeCO 3 OH precursors, which was often prepared by solution precipitation, [29] sol-gel, [30] microemulsion, [31] sonochemical, [32] hydrothermal methods. [33] However, these synthetic processes usually were complicated with high synthesis cost due to the expensive templates and additives.…”