Nanoarchitectures for Mesoporous Metals

Abstract

The field of mesoporous metal nanoarchitectonics offers several advantages which cannot be found elsewhere. These materials have been showcasing impressive enhancements of their electrochemical properties for further implementation, compared to their micro- and macroporous counterparts. Since the last few decades, various methods have been developed to achieve narrow pore size distribution with a tunable porosity and particle morphology. While hard templates offer a reliable and intuitive approach to synthesize mesoporous metals, the complexity of the technique and the use of harmful chemicals pushed several research groups to focus in other directions. For example, soft templates (e.g., lyotropic crystals, micelles assemblies) and solution phase methods (requiring to control reduction reactions) offer more and more possibilities in terms of available compositions and morphologies. Indeed, various metal (Pt, Pd, Au, Ru, etc.) can now be synthesized as dendritic, core@shell, hollow or polyhedral nanoparticles, with single- or multicomponents, alloyed or not, with unprecedented electrochemical activity.

Nanostructured nonprecious metal catalysts for electrochemical reduction of carbon dioxide

“…(1) Exploring novel nonprecious metal electrocatalysts by introducing hierarchical porous structures Porous materials have exhibited promising catalytic performance in many electrochemical reactions, such as ORR and HER [162][163][164][165]. The electrolyte diffusion can be tuned by tailoring the pore size of porous materials from micropore to macropore regions.…”

CO2adsorption on different organo-modified SBA-15 silicas: a multidisciplinary study on the effects of basic surface groups

“…lithium/sodium/potassium based sorbents, calcium oxides, hydrotalcites or amine supported materials) are currently studied. 5,6,7,8,9 Among these materials, organic--inorganic hybrid samples show potential applications as CO 2 adsorbents, owing to their high adsorption capacity, high selectivity, and excellent chemical stability. 1 Among these porous solids functionalized with amino groups deserve particular attention in relation to the encouraging results.…”

Recent Advances in Nanoparticle Shape and Composition Regulation Based on Galvanic Replacement for Cancer Treatment

“…In the case of noble metal nanoparticles, no methods for the controlled synthesis of porous nanostructures have been established owing to the need for reducing-agent-mediated synthetic strategies and the importance of crystallinity. Nonetheless, because of the extremely high surface-to-volume ratios and structural advantages of porous nanostructures, the development of new synthetic methods for noble metals has been a subject of increasing interest [200][201][202][203][204][205][206][207][208][209][210][211]. The synthesis of porous Au nanoparticles using Ag nanospheres was first achieved through an extended synthetic strategy called inhibitory galvanic replacement.…”