Highly active CeO2 hollow-shell spheres with Al doping

Wang, Zumin; Jiang, Shuaiyu; Li, Yanhui; Xu, Pengfei; Zhao, Kun; Zong, Lingbo; Wang, Hao; Yu, Rong

doi:10.1007/s40843-017-9042-0

Cited by 22 publications

(8 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared with mesoporous structures, HoMSs have more internal cavities that are arranged in order so that sequential catalysis or sequential release can be realized. Therefore, HoMSs are expected to have better performances over their single‐ or double‐shelled counterparts and other ordinary porous structures or nanostructures for applications such as electrochemical energy storage, solar energy conversion, electromagnetic wave absorption, catalysis, and drug delivery …”

Section: Introductionmentioning

confidence: 99%

Sequential Templating Approach: A Groundbreaking Strategy to Create Hollow Multishelled Structures

et al. 2018

View full text Add to dashboard Cite

Thanks to their distinguished properties such as optimized specific surface area, low density, high loading capacity, and sequential matter transfer and storage, hollow multishelled structures (HoMSs) have attracted great interest from scientists in broad fields, including catalysis, drug delivery, solar cells, supercapacitors, lithium‐ion batteries, electromagnetic wave absorption, and sensors. However, traditional synthesis methods such as soft‐templating and hierarchical self‐assembly methods can hardly realize the controllable synthesis of HoMSs, thus limiting their development and application. Here, the development process of HoMSs is first succinctly reviewed and the shortcomings of the traditional synthesis method are concluded. Subsequently, the sequential templating approach, which shows great generality for the synthesis of HoMSs with controllable composition and geometry configuration and exhibits remarkable effect on the scientific research field, is introduced. The basic material science and chemical reaction mechanism involved in the synthesis and manipulation of HoMSs using the sequential templating approach are then explained in detail. In addition, the effect of the geometric characteristics of HoMSs on their application properties is highlighted. Finally, the current challenges and future research directions of HoMSs are also suggested.

show abstract

Section: Introductionmentioning

confidence: 99%

Sequential Templating Approach: A Groundbreaking Strategy to Create Hollow Multishelled Structures

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The generation/elimination of oxygen vacancies, together with the corresponding alteration of valence state of Ce, leads to the widely-recognized oxygen storage capacity (OSC) that makes CeO 2 a highlight in catalysis research [1][2][3][4], and applications like photocatalysis and solid oxide fuel cells that significantly rely on the amount and mobility/ diffusion of carriers, such as light absorption and band structure, while the generation of defects can be beneficial by inducing more carriers [5][6][7][8][9]. Thus, tailoring composition and morphology of pure and doped ceria has been a highlight in catalyst and electrolyte research [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Unique redox properties in defective CeO2-x nanocrystallines synthesized by laser melting

Song

Zhang

et al. 2018

Sci. China Mater.

View full text Add to dashboard Cite

Defects in cerium oxide, especially oxygen vacancies, play an essential role in its versatile applications and are efficiently preserved at ambient conditions in a nonequilibrium process. Herein, defective CeO 2-x with heterogeneous structure was synthesized by high-energy laser melting, where a large amount of oxygen vacancies and Ce 3+ could be introduced, leading to improved visible light absorption, narrowed bandgap and room temperature ferromagnetism. Moreover, this laser melted CeO 2-x exhibits significantly enhanced low-temperature oxidation behaviors than the counterpart prepared by normal hydrogen-reduction. This unique redox performance could be attributed to the intragranular diffusion at the boundaries of assembled nanocrystallites. This method paves a new way for introducing unique multi-functions in oxide ceramics.

show abstract

“…As we know, the loss of an oxygen atom from Cu 2 O and CuO generates an oxygen vacancy. Surface oxygen vacancies are the most relevant surface defects in metal oxides, and they participate in a large number of chemical reactions [35,50]. Although the exact mechanism of Rochow reaction over Cu-based catalysts is still unclear, previous studies have shown that CH 3 Cl first adsorbs on the surface to form Cu x Si active phase, then reacts with Si atoms to form M2 [26,30,33,49].…”

Section: Science China Materialsmentioning

confidence: 99%

Diffusion-controlled synthesis of Cu-based for the Rochow reaction

Liu

et al. 2017

Sci. China Mater.

View full text Add to dashboard Cite

The properties of materials are strongly dependent on their structures. The diffusion effect is a main kinetic factor that can be used to regulate the growth and structure of materials. In this work, we developed a systematic and feasible strategy to synthesize Cu 2 O solid spheres and hexahedrons by controlling the diffusion coefficients. These Cu 2 O products can be successively transformed into corresponding Cu hollow spheres and hexahedrons as well as CuO porous spheres and hexahedrons by controlling hydrogen diffusion in hydrazine hydrate solution and controlling oxygen diffusion in air, respectively. The formation of these transformations was also discussed in detail. Tested for Rochow reaction, the as-prepared Cu 2 O solid and CuO porous spheres exhibit higher dimethyldichlorosilane selectivity and Si conversion than Cu hollow spheres, which is attributed to the active sites for CH 3 Cl adsorption formed in Cu x Si phase after the removal of oxygen atoms in Cu 2 O and CuO in the formation of dimethylchlorosilane. The present work not only develops a feasible method for preparing well shape-defined Cu 2 O solid spheres and hexahedrons but also clarifies the respective roles of Cu, Cu 2 O and CuO in dimethyldichlorosilane synthesis via Rochow reaction.

show abstract

Highly active CeO2 hollow-shell spheres with Al doping

Cited by 22 publications

References 38 publications

Sequential Templating Approach: A Groundbreaking Strategy to Create Hollow Multishelled Structures

Sequential Templating Approach: A Groundbreaking Strategy to Create Hollow Multishelled Structures

Unique redox properties in defective CeO2-x nanocrystallines synthesized by laser melting

Diffusion-controlled synthesis of Cu-based for the Rochow reaction

Contact Info

Product

Resources

About