This article summarizes core aspects of beam-sample interactions in research that aims at exploiting the ability to detect single atoms at atomic resolution by mid-voltage transmission electron microscopy. Investigating the atomic structure of catalytic Co3O4 nanocrystals underscores how indispensable it is to rigorously control electron dose rates and total doses to understand native material ...

An effective approach to synthesizing crystalline iron oxide nanoplates (~3 nm thick) and nanoflowers composed of ~5 nm small grains was reported. The formation of different-shaped nanoparticles in a similar system was achieved by controlling the nucleus concentration and growth rate.

Based on our previous investigations, it turned out that the Co3O4 material is a promising catalyst in ambient pressure CO2 methanation. This work aims at understanding Pt-Cobalt-Oxide surface interaction and its effect catalytic performance. The incorporation of Pt nanoparticles into mesoporous (Pt/m-Co3O4) commercial (Pt/c-Co3O4) improves activity both catalysts by factor ? 1.4 1.9 respective...

Effects of Fe2O3 addition (2-20 wt%) with 1 h mechanical activation on redox reactions of Co3O4 were studied by TG/DSC, SEM, and XRD analyses. The results showed that a Fe2O3 addition from 2 to 15 wt% increases the oxygen release from 1.4 to 3.4 wt% and decreases the reduction onset temperature from 1030 to 960 °C, while it increases the oxygen uptake value and re-oxidation onset temperature re...

Cobalt oxide thin films were successfully grown directly on fluorine-doped tin glass substrates through a simple, green, and low-cost hydrothermal method. An investigation into the physicochemical characteristics photoelectrochemical (PEC) properties of developed cobalt film was comprehensively performed. At various annealing temperatures, different morphologies crystal phases observed. Microfl...

Rapid capacity decay and inferior kinetics are the vital issues of anodes in conversion reaction for lithium-ion batteries. Vacancy engineering can efficiently modulate intrinsic properties transition-metal oxide (TMO)-based electrode materials, but effect oxygen vacancies on performance remains unclear. Herein, abundant situ introduced into lattice different TMOs (e.g., Co3O4, Fe2O3, NiO) via ...

To remedy the problems caused by the introduction of an additional electron mediator and realize signal amplification, a new strategy has been presented to construct an electrochemical aptasensor for thrombin detection based on the cascade electrocatalysis of alkaline phosphatase (ALP) and Pt nanoparticle (PtNP)-functionalized ZnO nanoflowers.

For the first time, two dimensional (2D) rectangular Co3O4 with micro-/nanoarchitectures is successfully synthesized by a facile hydrothermal treatment with the assistance of poly(diallyldimethylammonium chloride) (PDDA). Owing to the strong electrostatic interaction, positively charged PDDA molecules are considered as structure directing agents and play a crucial role in the formation of the u...

we report on the synthesis, morphology, chemically and structurally of la2o3-co3o4-zro2 nanostructure. the la2o3-co3o4-zro2 nanostructure was synthesized by a method based on the co-precipitation. composite powders have been characterized by xrd (x-ray diffraction), sem (scanning electron microscopy) and bet (brunauer-emmett-teller). x-ray diffraction showed the formation of nano crystalline, l...