Introduction to Porous Nitrogen

Herein, we report an unusual result regarding the active centre of a HER catalyst, which was synthesized by electrodepositing traces of Pt nanoparticles (NPs) into a porous nitrogen-rich dodecahedron matrix derived from zeolitic imidazolate framework-8.

A green and sensitive analytical procedure by dispersive solid-phase nanoextraction (DSPNE) strategy based on mesoporous nitrogen-doped hollow carbon sphere as adsorbent is developed for the simultaneous determination of atorvastatin (AT) and amlodipine (AM) in spiked human plasma.

Herein, two-dimensional (2D) holey NiFeP nanoarrays are vertically grown on a three-dimensional (3D) porous nitrogen-doped carbon sponge (N-CS) to form a hierarchically self-supported electrocatalyst (named NiFeP@N-CS) for efficient water splitting.

In this work, a porous nitrogen-doping carbon grafted carbon nitride (N-doping carbon / CN) has been fabricated via the temperature-programmed thermal polymerization of urea with carboxyl functionalized polystyrene (HOOC-PS) nanospheres as template and carbon source.

Herein, porous nitrogen-doped Sn/C fibers (P-Sn/C-N Fs) film has been successfully synthesized via simple electrospinning and subsequent calcination process in which folic acid and polymethylmethacrylate (PMMA) play the role of introducing nitrogen and forming pores, respectively.

Then, visible-light-response mesoporous nitrogen and sulfur co-doped TiO2 nanoparticles were used for compounding with g-C3N4 to form the heterojunctions catalyst.

The honeycomb-like porous nitrogen-doped carbons are fabricated through a facile impregnation of alkaline solution and NH3 post-treatment method.

Herein, a convenient and controllable solid-phase route is proposed for the preparation of porous nitrogen (N) and boron (B) co-doped carbon nanotubes (NBCNT) by using tubular polypyrrole (PPy) and sodium tetraphenylboron ((C6H5)4BNa), in which (C6H5)4BNa serves not only as a B source but also as a pore-forming agent that can help to regulate N configuration and expose more active sites.

6 V aqueous asymmetric device was assembled using prepared mesoporous nitrogen-doped double-layer hollow carbon microspheres as the negative electrode and CuCo2S4 as the positive electrode.

They are represented by polypyrrole-coated sponge converted by pyrolysis to a macroporous nitrogen-containing carbon, magnetic ferrosponge obtained by incorporation of magnetite, or the conventional globular polypyrrole coating replaced with polypyrrole nanotubes.

A series highly dispersed Co-Ni alloy NPs embedded in porous nitrogen-containing carbon matrix multifunctional catalysts (xCo-yNi@NC) were prepared by pyrolysis of MOF template.

Herein, well-dispersed crystalline RuS2 nanoparticles (c-RuS2 NPs) with ultrasmall particle size anchored on porous nitrogen and sulfur co-doped hollow carbon spheres (NSC) are synthesized for alkaline HER electrocatalysis.

Here, we reported a simple and effective method for the preparation of nanoporous nitrogen-doped carbonaceous material for liquid phase adsorbents and supercapacitor electrodes.

Here we report a crystalline mesoporous nitrogen-containing covalent organic framework (TAPB-BPDA COF) as a highly efficient iodine adsorbent, which is synthesized by imine condensation reaction between 1,3,5-tris(4-aminophenyl)benzene and 4,4′-biphenyldicarboxaldehyde.

Herein a typical nanoporous nitrogen-rich single atom Fe−N/C electrocatalyst on carbon nanotube (NR-CNT@FeN-PC) was successfully prepared by using CNT as carbon substrate, polyaniline (PANI) and dicyandiamine (DCD) as binary nitrogen sources and silica-confinement-assisted pyrolysis, which not only facilitate rich N-doping for the inhibition of the Fe agglomeration and the formation of single atom Fe−N x sites in carbon matrix, but also generate more micropores for enlarging BET specific surface area (up to 1500 m2·g−1).

Herein, a porous nitrogen-doped carbon nanorod embedded with ultrafine Bi nanoparticles (Bi-NC) is constructed to function as an advanced sulfur host.

In this work, we present hierarchically micro/meso/macroporous nitrogen-doped Murray carbon fibers (MCFs) inspired by generalized Murray's law with the engineered quasi-optimal Se/C interface as a free-standing high–Se-loading host for high-performance Li/Na–Se batteries at elevated temperature.

Herein, a facile top-down strategy is presented to synthesize ultrafine Ru nanoparticles confined in three-dimensional (3D) porous nitrogen-doped carbon nanosheets (Ru/3DNCN).

Moreover, porous nitrogen-doped carbon foam (PNCF) was synthesized as the cathode of LIC.

An efficient permeability lossless catalytic ceramic membrane (N-rGO-CM) fabricated from nanoporous nitrogen-doped reduced-graphene-oxide (N-rGO) with tunable interface properties was designed, in which homogeneously embedded highly active doped N gathers free electrons from membrane interface to produce more OH.

Sn2S3 acts as a high-capacity composition, while the porous nitrogenous-carbon matrix serves as a rigid-conductive frame to accommodate the volume expansion and prevents the aggregation of nano Sn2S3.

Porous nitrogen-doped Ti3C2Tx MXene microspheres have been synthesized by a facile synthesis method.

Porous nitrogen–doped-carbon-coated nano-Si/graphite ternary composites were prepared by liquid-phase stirring, high-temperature calcination, and acid etching.

Herein, we report a simple, economical, and large-scale production method to construct worm-like porous nitrogen-doped carbon with in situ-grown carbon nanotubes and uniformly embedded Fe/Fe3C nanoparticles.

In the designed graphene/porous nitrogen-doped carbon nanofibers, graphene can improve the electronic conductivity of the composite materials, and a large amount of mesopores provided much more exposed N-doped active sites for adsorbing K+.

Bimetal-organic frameworks derived tuneable Co nanoparticles embedded in porous nitrogen-doped carbon nanorods for electromagnetic wave absorption applications.

Therefore, we take Se as the guest and porous nitrogen-modified flower-shaped hollow carbon spheres (NFHC) as the main body to form Se-NFHC.

To investigate the possibility of nanoporous nitrogen-doped carbon materials as catalysts in fuel cells and electrodes in lithium-ion batteries, biomass precursors were thermochemically activated with NaOH at 800 °C, nitrogen was introduced using dicyandiamide and doping was performed at 800 °C.

clofibric acid (CLFA), methylchlorophenoxypropionic acid or mecoprop (MCPP) and 2,4-dichlorophenoxyacetic acid (2,4-D) from water was studied using a porous nitrogen-enriched carbon.

The NHCF can effectively confine polysulfides and electrochemical reaction within the hollow channel and expedite lithium ion diffusion and electrode transport through porous nitrogen-doped carbon rampart.

A composite anode material consisting of a stable inner core of mesocarbon microbeads and a porous nitrogen-doped amorphous carbon shell active for lithium storage is prepared.

Porous nitrogen-doped reduced graphene oxide (NRGO) is successfully synthesized from graphene oxide via the combination of CO2 activation and nitrogen doping with ammonia.

Herein, we report a facile supramolecular self-assembly strategy for the preparation of porous nitrogen-rich graphitic carbon nitride (g-C3N4) nanotubes with Lewis basicity and a large surface area, which are beneficial for the adsorption of CO2 and, consequently, the enhancement of the photocatalytic CO2 reduction activity.

5 A·g−1, compared with the nonporous nitrogen-doped carbon (N-C) derived from pure PANI.

We report here the preparation and electrochemical characterization of nano-sized LiFePO4, starting from Fe(III) precursor, embedded in ordered mesoporous nitrogenous carbon (LFP/MNC-31).

Microporous nitrogen‐rich carbon fibers (HAT‐CNFs) are produced by electrospinning a mixture of hexaazatriphenylene‐hexacarbonitrile (HAT‐CN) and polyvinylpyrrolidone and subsequent thermal condensation.

Here we report a novel hybrid of nitrogen-doped carbon shell coated CoP nanocrystals encapsulated in porous nitrogen-doped carbon substrate (CoP/PNC), which is synthesized through sol-gel and consequent pyrolysis-oxidation-phosphorization method.

Herein, a facile efficient pyrolysis approach was developed to prepare graphene-encapsulated Co nanoparticles (NPs) embedded in porous nitrogen-doped graphitic carbon nanosheets (Co@G/N-GCNs), in which g-C3N4 served as C and N sources, and cobalt phthalocyanine (CoPc) as the Co- and N-sources.

Porous nitrogen-rich covalent organic frameworks (COFs) are most challenging materials for selective CO2 capture, separation, and conversion for a substantive impact on the environment and clean energy application.

Mesoporous nitrogen-doped carbon quantum dot (NCQD)/BiOCl composites are fabricated via a facile solvothermal method, which exhibits outstanding photocatalysis for removing organic pollutan.

In this work, a facile approach to promote ionic conductivity and capacity of LiFePO4 was developed by dispersing LiFePO4 nanoparticle into a porous nitrogen-riched carbon matrix, facilitated by practical one-pot synthesis The N-containing carbon porous matrix was prepared by utilizing pluronic F127 as the porous template and melamine-formaldehyde (MF) resin as the N-containing carbon precusor.

Porous nitrogen-doped and nitrogen-free carbon materials possessing high specific surface areas (400–1000 m2 g−1) were used for deposition of Ni by impregnation with nickel acetate followed by reduction.

A novel FeS/Fe3C nanoparticles encapsulated in porous nitrogen-sulfur dual-doped graphene network (FeS/Fe3C@NS-G) have been successfully fabricated via a one-step in-situ pyrolysis strategy.

9 V and exhibits a superior energy density of 8 Wh kg−1 at an ultrahigh power density of 9627 W kg−1 owing to the matching of MnO2@CS and porous nitrogen-doped activated carbon.

Here, a lithiophilic 3D nanoporous nitrogen-doped graphene as the sought-after scaffold material for lithium anodes is reported.

In this work, with the application of a newly developed metal-free nanocasting method, an in-situ mesoporous nitrogen-doped braided-looking carbon nanotube (MNCNT) catalyst was fabricated.

Here, a series of graphene@mesoporous nitrogen-doped carbon (denoted as G@mesoNC) core-shell structured nanosheets with tunable thicknesses have been fabricated via a sample hydrothermal method by using cellulose as the green and cheap carbon precursor.

Herein, novel hierarchical mesoporous nitrogen-rich carbon nanospheres comprising one-dimensional (1D) bamboo-like carbon nanotubes encapsulating Fe3O4 nanoparticles synthesized through a simple and convenient strategy are used as a high-efficiency host for lithium–sulfur batteries (Li–S batteries).

Herein, an acidic ionic liquid (IL)-functionalized mesoporous melamine-formaldehyde polymer (MMFP-IL) was prepared for the first time by quaternary ammonization of mesoporous nitrogen-rich melamine-formaldehyde polymer (MMFP) with 1,3-propanesultone, followed by treatment with H3PW12O40 (HPW).

In this strategy, N-coordinated isolated single-atomic Pd sites are fully embedded on the inner walls of mesoporous nitrogen-doped carbon foam nanospheres (ISA-Pd/MPNC).

The electrospun-based porous nitrogen-enriched carbon-coated olivine LiFePO4 nanocomposites (MF-PVA/LFP) were prepared by employing the practical electrospin technique and using affordable polymers, melamine-formaldehyde (MF) with poly(vinyl alcohol) (PVA), as the nitrogen-containing carbon precursor, followed by carbonization at various temperatures.

Thin vanadium pentoxide (V2O5) layers were grown on porous nitrogen-doped-graphene (NG) nanosheets via atomic layer deposition (ALD).

Herein, we designed and synthesized a high-efficiency and stable catalyst with low-ruthenium content CoRu alloy nanoparticles supported on porous nitrogen-doped graphene layers (CoRux@N-C) via pyrolysis of small organic metal molecules.

Herein, a rational synthesis of ultrafine carbide nanocrystals confined in porous nitrogen-doped carbon dodecahedrons (PNCDs) by annealing functional zeolitic imidazolate framework (ZIF-8) with molybdate or tungstate is reported.

Herein, a novel nanoflower-like electrocatalyst comprising few-layer nitrogen-doped graphene-encapsulated nickel-copper alloy directly on a porous nitrogen-doped graphic carbon framework (denoted as Nix Cuy @ NG-NC) is successfully synthesized using a facile and scalable method through calcinating the carbon, copper, and nickel hydroxy carbonate composite under inert atmosphere.

In the synthesis of iron-chelating ordered mesoporous nitrogen-functionalized carbon (Fe–OMC) catalysts, the removal of the silica template is a crucial and critical step.

Depending on the variant of preparation, the final products were micro/mesoporous nitrogen-doped activated carbons of well-developed surface area ranging from 617 to 1117 m2/g, showing acidic or intermediate acid-base character of the surface and different contents of nitrogen functional groups varying from 1.

Herein we demonstrate a selective on-surface covalent coupling reaction that is templated by metal-organic coordinative bonding, and achieve a porous nitrogen-doped carbon nanoribbon structure.

A novel type of porous nitrogen-doped carbon networks derived from a green biomass-waste (orange peel) by integrated carbonization, activation, and nitrogen-doped processes using FeCl3 as activating agent and urea as nitrogen precursor and gasification expander.

Herein, a three-dimensional (3D) porous nitrogen-doped graphene aerogel (NGA) was prepared by a hydrothermal method followed with lyophilization and high-temperature treatment to guide the uniform and dendrite-free Li deposition.

In this study, metallic Co nanoparticles were encapsulated with porous nitrogen-doped carbon (Co@NC).

In the contribution, we first devise a bottom-up method for scalable fabrication of the nano-dimensional NCO particles encapsulated in porous nitrogen-doped carbon sub-microspheres (NCS), which are derived from bi-metal (Ni, Co) metal-organic framework.

Herein, micromesoporous nitrogen-doped carbons MPNC-1 and MPNC-2 are successfully obtained by direct carbonization (800 °C, KOH activation) of metal-organic complexes DQA-1 and DQA-2.

Herein, we prepared an isolated iron single atomic catalyst supported on ordered mesoporous nitrogen-doped carbon (Fe1/N-C).

These Co(II) ions were thermally converted into fine Co nanoparticles highly dispersing in porous nitrogen-doped carbons.

Taking advantage of the hydrogel behavior together with the mechanical stability of GO sheets, an interconnected macro-porous nitrogen-doped free-standing film is constructed.

Here, a method is reported for the preparation of cobalt metal and cobalt oxide cores confined within nanoporous nitrogen‐doped hollow carbon capsules.

In this study, a self-supported three-dimensional (3D) porous nitrogen-doped nickel selenide (N NiSe2) electrode is constructed and its HER activities over a wide range of pH are evaluated.

Herein, we deliberately design a multiple-scale nanostructured and flexible anode by a facile one-step sulfidation strategy, in which ultrafine metal sulfide nanocrystals are isolated and protected by porous nitrogen-doped carbon nanospheres (PNC) and then encapsulated into three-dimensional graphene microsheets (3DG).

Herein, we design a core–shell nanocomposite by encapsulating radially oriented MoS2 nanosheets by porous nitrogen-doped carbon (MoS2@NC) via an eco-friendly method.