Ordered Mesoporous Carbons with Graphitic Tubular Frameworks by Dual Templating for Efficient Electrocatalysis and Energy Storage

Abstract

Ordered mesoporous carbons (OMCs) have attracted considerable interest owingt ot heir broad utility.O MCs reported to date comprise amorphous rod-like or tubular or graphitic rod-like frameworks,which exhibit tradeoffs between conductivity and surface area. Here we report ordered mesoporous carbons constructed with graphitic tubular frameworks (OMGCs) with tunable pore sizes and mesostructures via dual templating,using mesoporous silica and molybdenum carbide as exo-and endo-templates,r espectively.O MGCs simultaneously realize high electrical conductivity and large surface area and pore volume.Benefitting from these features, Ru nanoparticles (NPs) supported on OMGC exhibit superior catalytic activity for alkaline hydrogen evolution reaction and single-cell performance for anion exchange membrane water electrolysis compared to Ru NPs on other OMCs and commercial catalysts.F urther,t he OMGC-based full-carbon symmetric cell demonstrates excellent performances for Li-ion capacitors.

Porous nanographene formation on γ-alumina nanoparticles via transition-metal-free methane activation

“…S11 † ) and other oxides. 20,23,72 Further surface engineering, including activation by gaseous reductants, may be helpful in lowering the operation temperature for more efficient CH 4 activation and NPG synthesis in the future.…”

Implementation of heteroatom-doped nanomaterial/core–shell nanostructure based electrocatalysts for fuel cells and metal-ion/air/sulfur batteries

“…Several studies were performed on the various aspects of CSNs using different nanomaterial architectures in AEMFCs. 74–77 Recently, highly conducting hydroxide AEM electrolytes have been employed in an alkaline electrolyte-based fuel cell. 74,78–80 AAEMFCs undergo the HOR at the anode, which generates hydroxide anions based on the ORR at the cathode and produces water as the final product at the anode.…”

Ni-Doped Ordered Nanoporous Carbon Prepared from Chestnut Wood Tannins for the Removal and Photocatalytic Degradation of Methylene Blue

“…OMCs are known for their uniform mesoporosity, high surface area, large pore volume, and chemical inertness. These properties enable the application of OMCs in catalysis, separation, energy storage, and environmental remediation [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. The wide uniform pores are highly suitable for the separation of large organic molecules and serve as channels for the fast mass transfer of these molecules to the active sites.…”

“…Two templating techniques are commonly used for the preparation of OMCs, hard-templating and soft-templating. Hard-templating, or nanocasting, is widely applied, as it permits precise control of pore size and shape by utilizing a template like mesoporous silica [ 3 , 4 , 5 , 7 , 8 , 11 , 12 ]. However, the disadvantages of this technique include the use of hazardous chemicals such as hydrofluoric acid (HF) and/or sodium hydroxide (NaOH) needed to remove the silica template, and the process of templating is considered time-consuming and costly.…”