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Carboxyl Group - Astrophysics Data System

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Last Updated: 02 October 2022

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Unveiling the cooperative roles of pyrrolic-N and carboxyl groups in biomass-derived hierarchical porous carbon nanosheets for high energy-power Zn-ion hybrid supercapacitors

Due to a shortage of cathode materials with high strength, particularly at high current density, Zn-ion hybrid supercapacitors' low energy density remains one of the key challenges against its commercialization. The ZHSC finally shows ultra-high energy density of 181. 6 W kg -1 at the power density of 165. 0 W kg -1, surpassing the overwhelming majority of state-of-the-art reported ZHSCs. According to the experimental findings and theoretical analyses, the hierarchically porous ultrathin nanosheet architecture with macro-, meso-, and micropores is excellent for increasing Zn 2+'s physical absorption, while the introduction of surface pyrrolic-N and carboxyl groups synergistically raises Zn 2+'s chemical adsorption of Zn 2+.

Source link: https://ui.adsabs.harvard.edu/abs/2022ApSS..59853819W/abstract


In-situ synthesis of metal-organic framework embedded in ordered mesoporous silica functionalized with carboxyl groups for 4-nitrophenol to 4-aminophenol

The -COOH-COOH co-condensation system herein successfully synthesized mesoporous silica using 3-phosphonopropionic acid as a functionalized reagent by one-pot co-condensation process. Then Cu 2+ ions were adsorbed by the -COOH groups on the OMS surface, ensuring that the OMS surface was properly cleaned. MOF-199@OMS-C composites possessed an ordered 2D hexagonal mesoporous composite, low-angle XRD, and TEM, according to the experimental findings of N2 adsorption-desorption, low-angle XRD, and TEM. MOF-199@OMS-C composites showed that in the pore of OMS-C, pore XRD, high specific surface area, and the formation of MOF-199 In the reduction reaction of 4-nitrophenol to 4-aminophenol, the MOF-199@OMS-C composites demonstrated good catalytic activity. In the ideal reaction environment, the apparent kinetic constant of 4-NP's reduction reaction was 0. 26 min -1. In addition, the kinetic curves of 4-NP reduction reaction were similar to first-order kinetics.

Source link: https://ui.adsabs.harvard.edu/abs/2022ApSS..59753720Z/abstract

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions