Porous hollow carbon spheres for electrode material of supercapacitors and support material of dendritic Pt electrocatalyst

CNTs@C@Cu2‐xSe Hybrid Materials: An Advanced Electrode for High Performance Lithium Batteries and Supercapacitors

“…For Se3d XPS spectra, the peak fitted at 54.3 eV is attributed to Se 2− 3d5/2, and the peak at 55.2 eV can be ascribed to Se 2− 3d3/2 (Figure c) . Figure d displays the fine XPS spectrum of C1s, the peaks at 284.8 and 285.5 eV can be mainly assigned to sp 2 ‐C (C=C) and sp 3 ‐C (C−C), whereas the fitted peaks cores at 286.6 and 288.4 eV are attributed to C‐OH and O=C−OH groups, respectively . The C1s of pure CNTs and CNTs@C are presented in Figure e and 3 f. Compared with the pure CNTs, the peak ascribed to O=C−OH (288.4 eV for CNTs@C@Cu 2‐x Se and 289.7 eV for CNTs@C) is comparative strong.…”

“…[25] Figure 3d displays the fine XPS spectrum of C1s, the peaks at 284.8 and 285.5 eV can be mainly assigned to sp 2 -C (C=C) and sp 3 -C (CÀ C), whereas the fitted peaks cores at 286.6 and 288.4 eV are attributed to C-OH and O=CÀ OH groups, respectively. [46][47][48] The C1s of pure CNTs and CNTs@C are presented in Figure 3e To display the effect of the amorphous carbon on the morphology, the pure CNTs are used as template instead of CNTs@C without changing other reaction parameters. As depicted in Figure 4a and 4b, only dispersed nanosheets and CNTs can be observed (denoted as CNTs@Cu 2-x Se).…”

Ultrahigh‐Content Nitrogen‐doped Carbon Encapsulating Cobalt NPs as Catalyst for Oxidative Esterification of Furfural

“…Recently,N -doped carbon-based transition-metalc atalysts have been regarded as sustainable heterogeneous catalysts with unique catalytic performance even comparable with precious metal catalysts in plenty of organic reactions, electrocatalysis, and photocatalysis, etc. [14][15][16][17][18] It was identified that doping heterocyclic N-species in the carbon matrix could enhance the performance of Co, Fe, and Ni, etc.,i nt erm of improving the electron performance and electrical conductivity, as well as creating defects. [19,20] Particularly,b asic pyridinic-N species doped in carbons could remarkably promote for the dehydrogenation steps.…”

Comparison of porous carbons derived from sodium alginate and calcium alginate and their electrochemical properties

“…Alginic acid, a natural polysaccharide in the cell wall of seaweed, is an excellent raw material for the preparation of charcoals. 36,37 In order to compare the differences in the microstructures of charcoals derived from alginic acid under the effect of sodium or calcium, sodium alginate and calcium alginate were chosen as precursors, which have the same carbon-forming component (alginic acid) and different regulation components (sodium or calcium), and those components are evenly distributed in the precursor. Two carbonized samples were obtained by simple carbonization.…”