Introducing catalytic gasification into chemical activation for the conversion of natural coal into hierarchically porous carbons with broadened pore size for enhanced supercapacitive utilization

Abstract

A catalytic gasification mechanism is introduced to prepare natural coal derived hierarchically porous carbon exhibiting excellent supercapacitive performances.

Zwitterionic Copolymer-Regulated Interfacial Polymerization for Highly Permselective Nanofiltration Membrane

“…The FTIR spectra further confirm the chemistry of the P­[MPC- co -AEMA] copolymer (Figure d), where the scissor peaks at 1089 and 970 cm –1 can be attributed to the −POCH 2 – and −N + (CH 3 ) groups of poly­[MPC], respectively, and the absorptions at 700 cm –1 are assigned to the −NH 2 groups of poly­[AEMA] . In the full-scan XPS spectra (Figure e), the apparent increase in the O and P elemental peak intensities (Figure S4) is due to the introduction of additional poly­[MPC] (Figure f–g). , …”

“…20 In the fullscan XPS spectra (Figure 1e), the apparent increase in the O and P elemental peak intensities (Figure S4) is due to the introduction of additional poly[MPC] (Figure 1f−g). 21,22 The surface microstructures of the TFC membrane were investigated by FESEM and AFM characterizations. According to the results shown in Figure 2a, the pristine PA membrane exhibits a conventional 2D-like nodular structure with tightly dispersed granular globules.…”

Template-free preparation of anthracite-based nitrogen-doped porous carbons for high-performance supercapacitors and efficient electrocatalysts for the oxygen reduction reaction

“…2c ) markedly exhibits the nanopore structures that are conducive to the increase in charge storage and rapid diffusion of electrolyte ions, as well as the lattice fringes with interplanar spacing of 0.357 nm, which could be assigned to the (002) plane of graphitic carbon, indicating ANPC-1-800-0.25 possesses a certain degree of graphitization. 23 On the other hand, ANPC-2-900-6 owns a different microstructure: as shown in Fig. 2d , it has a micrometer-scale lamellar morphology with irregular shapes.…”

“…21,22 Such hierarchical pore structure is capable of supplying carbon materials with high specic capacitance and rate capability for supercapacitors and high electrocatalytic activity for the ORR. 23,24 Nevertheless, porous carbon materials are very prone to penetration limitation because many micropores deeply buried in the internal carbon materials are not accessible to electrolyte ions and catalytic triple phase boundaries. 25,26 Consequently, pore width distributions of materials need to be optimized by modulating the activation/doping process.…”

Enhancement Effect of Ordered Hierarchical Pore Configuration on SO2 Adsorption and Desorption Process

“…However, hierarchical pore structures remain challenging for synthesis and application in flue gas desulfurization. Furthermore, hierarchical materials are also promising in many applications, including water and air purification [23], gas separation [24], catalysis [25], chromatography [26], and energy storage [27]. Related research results are worth learning about for hierarchical pore structures used in flue gas desulfurization.…”