Template-free Synthesis of Mesoporous and Crystalline Transition Metal Oxide Nanoplates with Abundant Surface Defects

Abstract

Synthesis of crystalline mesoporous transition oxides is very challenging considering the crystallization of oxides is usually accompanied by the growth of crystalline grains that commonly results in pore collapse before crystallization. Here, we have developed a versatile template-free method and successfully realized general preparation of six mesoporous transition oxides such as CuO, CoO, and spinel MCo 2 O 4 (M = Co, Cu, Mn, and Zn). In addition, the mesoporous Co 3 O 4 is identified as surface-defect rich, which endows it with excellent catalaselike activity.

Encapsulating Oxygen‐Deficient TiNb24O62 Microspheres by N‐Doped Carbon Nanolayer Boosts Capacity and Stability of Lithium‐Ion Battery

“…[38][39][40][41] Oxygen deficiencies are known to facilitate ion and charge transfers being able to significantly raise the conductivity, decrease the energy barriers, and thus increase Li + diffusion coefficients. [42][43][44][45] To date, metal thermal reduction, electrochemical reduction, and high-temperature hydrogenation have been reported to induce oxygen deficiencies in oxide-based anodes. [46][47][48][49] However, the choice of a technique for oxygen deficiencies has to be considered with other parameters, such as the cost and production efficiency for an industrial process.…”

“…oxygen vacancies) in the material itself is another effective strategy to improve the conductivity and the overall electrochemical properties [38–41] . Oxygen deficiencies are known to facilitate ion and charge transfers being able to significantly raise the conductivity, decrease the energy barriers, and thus increase Li + diffusion coefficients [42–45] . To date, metal thermal reduction, electrochemical reduction, and high‐temperature hydrogenation have been reported to induce oxygen deficiencies in oxide‐based anodes [46–49] .…”

Metal–Organic‐Framework‐Derived Nanostructures as Multifaceted Electrodes in Metal–Sulfur Batteries

“…Particularly, transition metallic compounds, including transition metallic oxides, sulfides, nitrides, phosphides, etc., are promising materials owing to their fascinating physicochemical performances relying on varying metal cations and inorganic anions. [ 178–187 ] Most transition metallic compounds possess conductivity and polar surfaces applicable for catalytic reaction with sulfur species, therefore, occupying the most significant part in catalytic hosts for MSBs.…”

Single-Crystalline Mesoporous Palladium and Palladium-Copper Nanocubes for Highly Efficient Electrochemical CO 2 Reduction

“…Complete crystallization of mesoporous walls would significantly compromise the structural stability and integrity, leading to the distortion or even collapse of ordered mesopores and consequently the loss of accessible surface areas and active sites. [11][12][13][14] Indeed, most mesoporous materials (such as silica, carbon and metal oxides) are amorphous or poorly crystalline in nature. There are only scarce reports available about singlecrystalline mesoporous oxides or nitrides in literatures.…”