Hierarchically ordered porous carbon with atomically dispersed cobalt for oxidative esterification of furfural

Abstract

Nitrogen-rich zeolitic imidazolate frameworks (ZIFs) are ideal precursors for the synthesis of metal single atom anchored on N-doped carbon. However, the microporous structures of conventional ZIFs lead to low mass...

Nitrogen-Doped Carbon Cubosomes as an Efficient Electrocatalyst with High Accessibility of Internal Active Sites

“…Notably, compared with those of the PC template, the unit cell parameter, pore size and wall thickness of the obtained SP-NC microspheres slightly shrank to 75, 53, and 22 nm, respectively (Figures b and c). The shrinkage is a common phenomenon during carbonization . Moreover, the small-angle X-ray scattering (SAXS) spectrum presents a series of characteristic peaks with a q ratio of (Figure d), corresponding to the (100), (110), (111), (200), and (210) reflections, respectively, confirming the ordered SP bicontinuous structure. , According to the SAXS pattern, a unit cell parameter of a = 77 nm is obtained for the SP-NC cubosomes, approaching the SEM result ( a = 75 nm).…”

“…The shrinkage is a common phenomenon during carbonization. 45 Moreover, the small-angle X-ray scattering (SAXS) spectrum presents a series of characteristic peaks with a q ratio of 1 : 2 : 3 : 4 : 5 (Figure 3d), corresponding to the (100), ( 110), ( 111), (200), and (210) reflections, respectively, confirming the ordered SP bicontinuous structure. 46,47 According to the SAXS pattern, a unit cell parameter of a = 77 nm is obtained for the SP-NC cubosomes, approaching the SEM result (a = 75 nm).…”

Hierarchically Ordered Macro–Mesoporous Electrocatalyst with Hydrophilic Surface for Efficient Oxygen Reduction Reaction

“…To further uncover the origin of the excellent performance of H-3DOM-Co/ONC, we prepared several counterpart materials with distinct porous structures. Co NPs immobilized on microporous, 3DOM, and H-3DOM supports were prepared using conventional ZnCo-ZIF, 3DOM-ZnCo-ZIF, and 3DOM-ZIF-8@ZIF-67 as precursors, [41,42] which were denoted as C-Co/NC, 3DOM-Co/NC, and H-3DOM-Co/NC, respectively (Figures S19-S22, Supporting Information). XRD patterns and TEM images of the materials exhibit similar particle sizes of metallic Co (Figures S11 and S20-S22, Supporting Information).…”

Two-Dimensionally Ordered Carbon Array Nanostructures with Atomically Dispersed Nickel for Sensitive Nonenzymatic Detection of Glucose

“…19 Li et al developed hierarchically ordered porous carbon with atomically dispersed Co, and the outstanding catalytic activity was attributed to the high intrinsic activity of the single-atom Co site as well as the good mass transfer properties and high accessibility of the active site due to the ordered macroporous structure. 20 Directional assembly is an effective way to control the properties of nanomaterials, which can often lead to novel properties. 21,22 However, the application of directional assembly in the field of electrochemical sensing based on single-atom nanozymes is very scarce.…”

“…Many strategies have been developed, such as diatomic sites, heteroatom modulation, constructing high-density single atoms, , and so on. Among various strategies, the regulation of the carrier is also an important way to improve the performance of the single atom since the single atom is usually anchored to the surface of the carrier material. , For example, Gong et al constructed a carbon carrier material with a three-dimensional porous structure for overcoming the shortcoming that the single-atom catalyst cannot effectively contact the reactant due to the easy stacking of two-dimensional carrier materials . Li et al developed hierarchically ordered porous carbon with atomically dispersed Co, and the outstanding catalytic activity was attributed to the high intrinsic activity of the single-atom Co site as well as the good mass transfer properties and high accessibility of the active site due to the ordered macroporous structure .…”