Porous Organic Polymer-Derived Carbon Composite as a Bimodal Catalyst for Oxygen Evolution Reaction and Nitrophenol Reduction

Abstract

Ethylene diamine-based porous organic polymer (EPOP) was synthesized, carbonized at different temperatures, and characterized. The successful formation of the triazine polymer was confirmed by Fourier-transform infrared spectroscopy, 13 C, and 15 N cross-polarization magic angle spinning solid-state NMR. The two-dimensional layered architecture and graphitic nature of the samples resembled that of nitrogen-doped amorphous carbon, as confirmed by Raman, powder X-ray diffraction, and transmission electron microscopy measurements. The catalytic activity of these materials toward nitrophenol reduction and electrocatalytic activity toward oxygen evolution reaction (OER) were systematically evaluated in detail. Electrocatalytic activity toward oxygen evolution reaction was systematically evaluated by chronoamperometry and linear sweep voltammetry. Results clearly demonstrate that all of these catalysts exhibit good OER activity and excellent stability. Among all catalysts, EPOP-700 showed better OER activity, as reflected by its onset potential and current density, comparable with that of the metal-based OER catalysts and better than that of metal-free catalysts. Further, their catalytic activity toward the reduction of 4-nitrophenol to 4-aminophenol was tested with NaBH 4 ; although all of these catalysts showed good catalytic activity; EPOP-800 displayed better catalytic activity.

Incorporation of copper nanoparticles into the nitrogen‐doped carbon derived from nitrile functionalized ionic liquid as the non‐precious heterogeneous catalytic system toward nitro compounds reduction reaction, a first principle calculation

“…Today's nitrogen enriched carbons are promising materials due to their performance in diverse areas, including energy‐related fields (such as lithium‐ion batteries, sensors, supercapacitors, fuel cell electrodes, and adsorbents), and catalysis 1‐7 . Their secure synthesis method, low‐cost precursor, regulated morphological structure, specific surface area, and acceptable stability towards high thermal and chemical conditions make them a good choice for many purposes 8‐12 . Among the miscellaneous types of N‐doped carbon materials, Covalent Triazine Frameworks (CTFs) have been introduced as one of the most distinguished mesoporous materials due to their great supply of nitrogen sites and extreme thermal and chemical resistance, all of which are related to the covalent bonding nature of triazine unites in their structure; in other words, the aromatic character of the C═N bond in the construction of the CTFs caused the excellent stability toward harsh conditions 13‐17 .…”

Covalent Organic Frameworks for Efficient Energy Electrocatalysis: Rational Design and Progress

“…[ 76 ] Very recently, the pristine metal‐free COFs are optimized using the postcarbonization process to increase the OER catalytic activity. [ 77 ] As a result, an ethylene diamine‐based porous COF was carbonized and explored as a metal‐free electrocatalyst for the OER. Compared with pristine COFs, the COF‐derived carbon material coated on carbon paper displayed significantly an enhanced OER catalytic activity in alkaline media with an onset potential of 1.527 V (vs RHE) and an overpotential of 297 mV at a current density of 10 mA cm −2 .…”

“…Compared with pristine COFs, the COF‐derived carbon material coated on carbon paper displayed significantly an enhanced OER catalytic activity in alkaline media with an onset potential of 1.527 V (vs RHE) and an overpotential of 297 mV at a current density of 10 mA cm −2 . [ 77 ] Furthermore, even at a high current density of 300 mA cm −2 , the COF‐derived carbon material showed a low overpotential of 580 mV and prolonged stability over 10 h, which is even better than some of the metal‐based OER electrocatalysts.…”

Highly Sensitive and Selective Eco-Toxic 4-Nitrophenol Chemical Sensor Based on Ag-Doped ZnO Nanoflowers Decorated with Nanosheets

“…Detecting nitro aromatic compounds is extraordinarily significant in assessing the danger of various natural tests such as wastewater from mining, paint and drug enterprises, petrochemical items, or the assembling of pesticides [ 1 , 2 , 3 , 4 , 5 ], which have a tendency to damage the living organism and plants in low concentrations [ 6 ]. Mainly, nitrophenol is formed during the hydrolysis process of diethyl parathion, which is reported by the United State Environmental Protection Agency (USEPA).…”