Porous Graphene Materials: The Chemistry and Promising Applications of Graphene and Porous Graphene Materials (Adv. Funct. Mater. 41/2020)

Abstract

In article number 1909035, Zhong‐Shuai Wu, Hui‐Ming Cheng, and co‐workers review the state‐of‐the‐art advances of the chemistry of graphene and porous graphene materials, and summarize their promising applications such as supercapacitors, batteries, electrocatalysis, and molecular separation.

Single‐Site Metal–Organic Framework and Copper Foil Tandem Catalyst for Highly Selective CO2 Electroreduction to C2H4

“…For divalent copper in the Cu–MOF–CF, as shown in Figure a, the peaks at ≈934.5 and ≈954.4 eV faced a decrease in intensity after the CO 2 RR test, while the peaks of Cu 0 /Cu + (Cu 2 O) in Cu–MOF–CF before the CO 2 RR test at ≈932.2 and ≈952.1 eV increased in intensity after the CO 2 RR test, which implied that partial Cu 2+ in the Cu–MOF–CF was reduced to Cu + or Cu 0 . [ 71–73 ] In the Cu LMM auger spectra, as exhibited in Figure 4b, there are oxidized Cu 2+ (≈572.5 eV), coordinated Cu 2+ (≈571.4 eV), Cu 0 (≈567.8 eV), and Cu + (≈570.0 eV) [ 74–76 ] that all appeared in the Cu–MOF–CF before and after the CO 2 RR test, respectively. Before CO 2 RR test, Cu + (≈570.0 eV) in Cu–MOF–CF belonged to the Cu 2 O (Figure 2a), which is important to promote the formation of multi‐carbon products.…”

Graphene‐Based Advanced Membrane Applications in Organic Solvent Nanofiltration

“…Nevertheless, planar graphene is generally unstable because the formation of curved structures, such as carbon nanotubes (1D) and fullerene (0D), is thermodynamically favorable (Figure 1c,d). [ 176 ] Despite these inherent challenges, substantial research on the development of stable graphene has been rapidly conducted. The first reported synthesis of graphene occurred in 1962, and this was synthesized through the reduction of graphene oxide by using a dilute sodium hydroxide solution.…”

Synergistic Bimetallic CoCu‐Codecorated Carbon Nanosheet Arrays as Integrated Bifunctional Cathodes for High‐Performance Rechargeable/Flexible Zinc‐Air Batteries

“…[ 11–13 ] By further conjugation with an N‐doped carbon matrix to tune the coordination configuration between Co and N heteroatoms, the electronic structure of Co sites can be effectively optimized for more balanced adsorption of oxo‐intermediates and improved ORR activity. [ 14–16 ] However, the formation of homogeneous and sufficient Co–N x active moieties is generally difficult, as the metallic loading in these Co–N–C catalysts is always restricted due to the high tendency of self‐agglomeration and irreversible fusion of cobalt nanoparticles (NPs) during common pyrolysis synthesis. [ 17,18 ] By taking advantage of high specific surface area, excellent conductivity, and mechanical strength, heteroatoms‐doped 2D nanocarbon could be useful to support and well distribute Co NPs for more exposed active sites, directional electron transfer and accelerated mass diffusion across the interspaces between the carbon nanosheets (CNSs), thus boosting the reversible oxygen reactions.…”