N-doped Carbon Polyhedrons Research Articles

Interface engineering on Magnéli Ti4O7 electrodes by doping with waste MOF-recycled N-doped carbon polyhedrons toward efficient electrooxidation of tetracycline

Interface engineering is an effective strategy for improving the catalytic activity of electrocatalysts. Herein, an enhanced binder-free Ti4O7 electrode doped with waste MOF-recycled N-doped carbon polyhedrons (Dr-CN) was developed and denoted as Dr-CN@Ti4O7. The chemical-bond formation at the interface of Ti4O7 and Dr-CN led to a significant acceleration of charge transfer and higher •OH yield at 1.55–2.75 times rate in comparison with pristine Ti4O7. At 0.5 %Dr-CN@Ti4O7 electrode, the oxidation rate of tetracycline (TCH) was about 3 times that of pristine Ti4O7, especially when doped with 2 wt% Dr-CN, the kinetic rate can be comparable to that of BDD electrode. Furthermore, the 0.5 %Dr-CN@Ti4O7 anode exhibited desirable stability and durability in consecutive 20 cycle tests and was shown to effectively mineralize refractory organic matters in actual livestock and coking wastewater. Energy consumption for TCH removal by 0.5 %Dr-CN@Ti4O7 electrode was calculated as 3.02 kWh m−3, with a 73.5–77.6 % reduction compared to some previous electrodes. These results suggested that the interface chemical-bonded engineering strategy via doping MOF-derived carbon can effectively improve the Magnéli-phase Ti4O7 electrode with satisfying electrochemical reactivity and stability.

Component modulation and integrated multidimensional heterostructures of bimetallic MOFs derived 0D Co3ZnC/Co encapsulated in 2D CNTs-grafted 3D N-doped porous carbon polyhedron for high-efficient microwave absorption

Component modulation and multidimensional structural design are effective strategies to regulate the electromagnetic parameters and impedance matching, resulting in high-efficient microwave absorption. Herein, multidimensional integrated Co3ZnC/Co@C heterostructures compounding of 0D Co and Co3ZnC NCs, 1D CNTs and 3D porous carbon polyhedrons were fabricated by pyrolysis of bimetallic MOFs. Co and Co3ZnC NCs are uniformly encapsulated in CNTs-grafted porous carbon polyhedrons, forming 0D-1D-3D integrated heterostructures. The Co3ZnC/Co@C composites show component-modulated electromagnetic parameters and microwave absorption properties, which can be simply regulated by adjusting the ratio of Co/Zn in the MOFs precursor. With a filling ratio of 30 wt%, the optimal Co3ZnC/Co@C heterostructures show a minimum reflection loss (RL) value of −66.78 dB at 7.43 GHz with a thickness of 4.5 mm, located at the C band. The maximum effective absorption bandwidth (RL≤−10 dB) is up to 4.8 GHz (12.9–17.7 GHz) at only 2.0 mm. The high-efficient microwave absorption performance is attributed to that the multidimensional integrated heterostructures can sufficiently maximize the synergistic effects of each component. The uniformly distributed 0D Co and Co3ZnC NCs can promote magnetic loss and interfacial polarization. 1D CNTs are beneficial to enhance the conductive loss. 3D porous carbon polyhedrons grafted with CNTs are favored to promote the scattering of microwaves and impedance matching. These findings suggest a new insight to achieve high-performance microwave absorption by modulating the component and integrating multidimensional structures.

Edge defects-regulated FeCo metalic sites confined in N-doped carbon polyhedron as an efficient ORR catalyst for durable Zn-air battery

Metal sites or nanoparticles immobilized on MOF-derived porous carbon matrix have gained enormous attention for oxygen electroreduction reaction (ORR), but they still suffered from the insufficient catalytic performance. Herein, we introduced edge defects to regulate the ORR performance of N-doped carbon polyhedron-supported FeCo bimetallic catalysts via a facile NaCl/KCl-assisted pyrolysis. HR-TEM, HAADF-STEM, Raman spectra, XPS and EPR analysis confirmed the existence of uniform FeCo atoms and edge defects within N-doped porous carbon polyhedrons and their mutual effect helped promoting ORR performance. The resulting FeCo-NC-30 exhibited more excellent ORR activity with E1/2 of 0.86 V, and faster kinetic process with a higher kinetic current density, Jk,E = 0.85V = 7.15 mA/cm2. As a cathode catalyst, it delivered a desirable power density of 196.9 mW/cm2, comparable to Pt/C, in home-made Zn-air batteries. Our findings demonstrated that the electronic tuning effect caused by carbon edge defects and synergistic bimetallic interactions is beneficial for enhancing ORR activity.

Monitoring of trace aquatic sulfonamides through hollow zinc-nitrogen-carbon electrocatalysts anchored on MXene architectures.

Herein, we designed and fabricated hollow N-doped carbon polyhedrons with atomically dispersed Zn species (Zn@HNCPs) through a topo-conversion strategy by utilising metal-organic frameworks as precursors. Zn@HNCPs achieved efficient electrocatalytic oxidation of sulfaguanidine (SG) and phthalyl sulfacetamide (PSA) sulfonamides through the high intrinsic catalytic activity of the Zn-N4 sites and excellent diffusion from the hollow porous nanostructures. The combination of the novel Zn@HNCPs with two-dimensional Ti3C2Tx MXene nanosheets resulted in improved synergistic electrocatalytic performance for the simultaneous monitoring of SG and PSA. Therefore, the detection limit of SG for this technique is much lower than those of other reported techniques; to the best of our knowledge, this is the first detection approach for PSA. Moreover, these electrocatalysts show promise for the quantification of SG and PSA in aquatic products. Our insights and findings can serve as guidelines for the development of highly active electrocatalysts for application in next-generation food analysis sensors.

Optimization of Fe and Co distribution on Fe-CoZn-ZIF derived polyhedral carbon via secondary adsorption for reversible catalysis of oxygen and zinc-air batteries

Bimetallic/polymetallic organic frameworks (MOFs) and their derivants have the advantages of structural adjustable, efficient charge transfer rate and intermetallic synergistic effects which can catalyze oxygen reduction reactions (ORR) and oxygen evolution reaction (OER) efficiently. However, traditional MOFs still faces limited active sites. The construction of catalysts with target active sites using binary/polymetallic MOFs is essential. Here, we prepared catalysts with bimetallic active sites highly dispersed in the interior and surface of N-doped carbon polyhedron via an inside-out (cavity confinement and secondary adsorption) approach. The prepared FeCo@FeCo-CN catalysts exhibited considerable bifunctional catalytic performance, as evidenced by the remarkable improved half-wave potential (E1/2 = 0.878 V) for ORR and the desired overpotential (368 mV) for OER as well as the small potential gap between them (ΔE = 0.720 V). Moreover, the liquid rechargeable Zinc-Air batteries based on the prepared catalyst showed high open-circuit voltage (1.506 V) and specific capacity (890.310 mA h gzn−1) with an impressive cycling stability which is apparently outperformed than Pt/C+RuO2 catalyst. The prime electrocatalytic behavior of the catalyst can be ascribed to the secondary adsorption of Fe and Co which contributes to the generation of more active sites while preventing the undesirable aggregation of metals.

MOF-Derived Nitrogen-Doped Porous Carbon Polyhedrons/Carbon Nanotubes Nanocomposite for High-Performance Lithium-Sulfur Batteries.

Nanocomposites that combine porous materials and a continuous conductive skeleton as a sulfur host can improve the performance of lithium-sulfur (Li-S) batteries. Herein, carbon nanotubes (CNTs) anchoring small-size (~40 nm) N-doped porous carbon polyhedrons (S-NCPs/CNTs) are designed and synthesized via annealing the precursor of zeolitic imidazolate framework-8 grown in situ on CNTs (ZIF-8/CNTs). In the nanocomposite, the S-NCPs serve as an efficient host for immobilizing polysulfides through physical adsorption and chemical bonding, while the interleaved CNT networks offer an efficient charge transport environment. Moreover, the S-NCP/CNT composite with great features of a large specific surface area, high pore volume, and short electronic/ion diffusion depth not only demonstrates a high trapping capacity for soluble lithium polysulfides but also offers an efficient charge/mass transport environment, and an effective buffering of volume changes during charge and discharge. As a result, the Li-S batteries based on a S/S-NCP/CNT cathode deliver a high initial capacity of 1213.8 mAh g-1 at a current rate of 0.2 C and a substantial capacity of 1114.2 mAh g-1 after 100 cycles, corresponding to a high-capacity retention of 91.7%. This approach provides a practical research direction for the design of MOF-derived carbon materials in the application of high-performance Li-S batteries.

Embedding cobalt (II, III) oxide nanoparticles into nitrogen-doped carbon nanotubes-grafted hollow polyhedrons as sulfur hosts for ultralong-life lithium-sulfur batteries

The sluggish reaction kinetics and unfavorable shuttling effect are regarded as obstacles to the practical application of lithium-sulfur (Li-S) batteries. To resolve these inherent drawbacks, we synthesized novel multifunctional Co3O4@NHCP/CNT as the cathode materials consisting of carbon nanotubes (CNTs)-grafted N-doped hollow carbon polyhedrons (NHCP) embedded with cobalt (II, III) oxide (Co3O4) nanoparticles. The results indicate that the NHCP and interconnected CNTs could provide favorable channels for electron/ion transport and physically restrict the diffusion of lithium polysulfides (LiPSs). Furthermore, N doping and in-situ Co3O4 embedding could endow the carbon matrix with strong chemisorption and effective electrocatalytic activity toward LiPSs, thus prominently promoting the sulfur redox reaction. Benefiting from these synergistic effects, the Co3O4@NHCP/CNT electrode exhibits a high initial capacity of 1322.1 mAh/g at 0.1 C, and a capacity retention of 710.4 mAh/g after 500 cycles at 1 C. Impressively, even at a relatively high current density of 4 C, the Co3O4@NHCP/CNT electrode achieves a high capacity of 653.4 mAh/g and outstanding long-term cycle stability for 1000 cycles with a low decay rate of 0.035% per cycle. Hence, the design of N-doped CNTs-grafted hollow carbon polyhedrons coupled with transition metal oxides would provide effective promising perspective for developing high-performance Li-S batteries.

Self-catalyzed Co, N-doped carbon nanotubes-grafted hollow carbon polyhedrons as efficient trifunctional electrocatalysts for zinc-air batteries and self-powered overall water splitting

It is still essential and challenging to explore inexpensive and versatile electrocatalysts for oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER), for the development of rechargeable zinc-air batteries (ZABs) and overall water splitting. Herein, a rambutan-like trifunctional electrocatalyst is fabricated by re-growth of secondary zeolitic imidazole frameworks (ZIFs) on ZIF-8-derived ZnO and the following carbonization treatment. Co nanoparticles (NPs) are encapsulated into N-doped carbon nanotubes (NCNT) grafted N-enriched hollow carbon (NHC) polyhedrons to form the Co-NCNT@NHC catalyst. The strong synergy between the N-doped carbon matrix and Co NPs endows Co-NCNT@NHC with trifunctional catalytic activity. The Co-NCNT@NHC displays a half-wave potential of 0.88 V versus RHE for ORR in alkaline electrolyte, an overpotential of 300 mV at 20 mA cm−2 for OER, and an overpotential of 180 mV at 10 mA cm−2 for HER. Impressively, a water electrolyzer is successfully powered by two rechargeable ZABs in series, with Co-NCNT@NHC as the 'all-in-one' electrocatalyst. These findings are inspiring for the rational fabrication of high-performance and multifunctional electrocatalysts intended for the practical application of integrated energy-related systems.

CoSe2-modified N-doped carbon polyhedron composites containing carbon nanotubes as effective anchors for lithium polysulfides

CoSe2-modified N-doped carbon polyhedron composites containing carbon nanotubes as effective anchors for lithium polysulfides

Simply embedding α-Fe2O3/Fe3O4 nanoparticles in N-doped graphitic carbon polyhedron layered arrays as excellent electrocatalyst for rechargeable Zn-air battery

Hybrids of α-Fe2O3/Fe3O4 nanoparticles embedded in N doped graphitic carbon polyhedron layered arrays (FeOx/NCLA) were simply constructed by pyrolyzing the composite precursor of NH2-MIL-101(Fe) (a metal organic framework, MOF) and glycylglycine. The experimental and calculated results reveal that the obtained catalysts exhibited multiple active components, synergistic heterojunction effect, high BET surface areas and conductivity, and consequently greatly improved intrinsic electrocatalytic activities and kinetics for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). As the results, the optimized catalyst FeOx/NCLA-1.2 exhibited positive half-wave potential of 0.846 V for ORR and only 218 mV of overpotential (at 10 mA/cm2) for OER in alkaline electrolyte, which is superior than Pt/C (20 %) and RuO2, respectively. The Zn-air battery (ZAB) employing the FeOx/NCLA-1.2 as electrocatalyst obtained a peak power density of 104.3 mW·cm−2, a specific capacity of 840 mAh·gZn-1 and an energy density of 890 Wh·kgZn-1, which is also much higher than that for the noble metal based one. The catalyst is promised to be applied in water electrolysis, fuel cells and metal-air batteries.

Engineering a Co/Co2P Mott–Schottky heterostructure encased in a hollow N-doped carbon polyhedron as an advanced nanoreactor towards high-efficiency electrocatalytic oxygen evolution

Through a feasible self-sacrificial template method, a nanoreactor composed of Co/Co2P heterostructured nanoparticlesin situconfined in N-doped carbon hollow rhombic dodecahedrons (Co/Co2P@N-CHRDs) was designed as an excellent OER electrocatalyst.

Enhanced activation of peroxymonosulfate by abundant Co-Nx sites onto hollow N-doped carbon polyhedron for bisphenol A degradation via a nonradical mechanism

In this study, novel Co-embedded hollow N-doped carbon polyhedrons, derived from ZIF-8@ZIF-67 core–shell structure, were synthesized and used for activating peroxymonosulfate (PMS) towards efficient bisphenol A (BPA) degradation. The contents of different N species, especially Co-Nx and graphitic N sites, were tuned by different calcination temperatures (800, 900, and 1000 °C). Characterization results demonstrated that hollow polyhedron with high graphitization degree and abundant porosity anchored numerous Co nanoparticles, which could enhance the catalytic performance. Compared to other as-prepared catalysts, Co/HNCP-900 (pyrolyzed at 900 °C) showed a more outstanding performance of PMS activation towards BPA degradation, and 95.1 % of BPA (20 mg/L) could be removed within 3 min. Abundant Co-Nx sites were a critical factor to induce the reaction process. Based on trapping, radical scavenger, and electrochemical analysis experiments, a nonradical process (singlet oxygen and direct electron transfer) was proposed to play the dominant role in BPA degradation. Benefiting from the nonradical process, BPA degradation efficiency almost remained stable either in a wide pH range (2.5–8.0) or in the presence of coexisting ions and natural organic matter. The findings of this study will elucidate a new opportunity for improving environmental remediation.

Engineering electronic and geometric structures of Fe, N-doped carbon polyhedrons toward organic contaminant oxidation

A universal gas diffusion strategy was developed to derive highly efficient PMS-activation catalysts comprising isolated Fe atoms coordinated with N species embedded in carbon polyhedrons (Fe-NC). Their electronic and geometric structures were modulated by altering the precursor ratio and calcination temperature. Benefiting from the maximized atomic utilization, the obtained catalysts exhibited superior catalytic performances, outperforming almost all previously reported metal materials. The enhanced activity is likely due to an optimal particle size and Fe content, favorable Fe-Nx active sites, and conductive carbon materials. Scavenging and probing experiments indicated that surface Fe-NC and the defective edges with oxygen functional groups were the active sites for PMS activation to produce surface-bonding active complexes (Fe-NC-PMS) and high-valent iron oxo species (FeV = O) for organic degradation, unlike the reported radicals and singlet oxygen mediated degradation. Overall, this work provides a universal gas diffusion strategy to design dimension-controlled Fe-NC catalysts for the elimination of organic pollutants.

Chemical reduction-induced fabrication of graphene hybrid fibers for energy-dense wire-shaped supercapacitors

The emerging one-dimensional wire-shaped supercapacitors (SCs) with structural advantages of low mass/volume structural advantages hold great interests in wearable electronic engineering. Although graphene fiber (GF) has full of vigor and tremendous potentiality as promising linear electrode for wire-shaped SCs, simultaneously achieving its facile fabrication process and satisfactory electrochemical performance still remains challenging to date. Herein, two novel types of graphene hybrid fibers, namely ferroferric oxide dots (FODs)@GF and N-doped carbon polyhedrons (NCPs)@GF, have been proposed via a simple and efficient chemical reduction-induced fabrication. Synergistically coupling the electroactive units (FODs and NCPs) with conductive graphene nanosheets endows the fiber-shaped architecture with boosted electrochemical activity, high flexibility and structural integrity. The resultant [email protected] and [email protected] hybrid fibers as linear electrodes both exhibit excellent electrochemical behaviors, including large volumetric specific capacitance, good rate capability, as well as favorable electrochemical kinetics in ionic liquid electrolyte. Based on such two linear electrodes and ionogel electrolyte, a high-performance wire-shaped SC is effectively assembled with ultrahigh volumetric energy density (26.9 mW·h·cm−3), volumetric power density (4900 mW·cm−3) and strong durability over 10,000 cycles under straight/bending states. Furthermore, the assembled wire-shaped SC with excellent flexibility and weavability acts as efficient energy storage device for the application in wearable electronics.

MOF-derived porous nitrogen and phosphorus codoped carbon nanosheets: An emerging material for constructing robust electrochemical sensing platform

Synthesizing novel MOFs derived carbon-based materials and investigating their sensing application own important scientific significance. In this work, Zn-MOF (ZIF-8) derived porous carbon with different dimension and atoms doping were facilely prepared via simple MOFs routes. Compared with the widely studied ZIF-8 derived three-dimensional porous N-doped carbon polyhedron frames (N-doped CPF), the two-dimensional porous N-doped carbon nanosheets (N-doped CNS) displayed remarkably enhanced electrochemical sensing performance for its stronger electron transfer ability. On the basis of N-doped carbon materials, the introduction of heteroatom P was also confirmed to be able to further boost their electrochemical activity for the promoted electrochemically active specific surface and interface interaction with the target molecules. As a result, ZIF-8 nanosheets derived N, P-codoped CNS was demonstrated to be qualified for the sensitive detection of various target analytes, including biological molecules (8-hydroxy-2′-deoxyguanosine and guanine), food additive (sunset yellow) and organic pesticide (benomyl). The linear response ranges were 2.5–1000 nM for 8-hydroxy-2′-deoxyguanosine, 50–3500 nM for guanine, 5.0–2000 nM for sunset yellow and 25–2000 nM for benomyl. Besides, their detection limits were as low as 0.85 nM, 14.50 nM, 2.15 nM and 7.50 nM with sensitivity of 950.00 µA μM−1 cm−2, 52.43 µA μM−1 cm−2, 527.14 µA μM−1 cm−2 and 381.43 µA μM−1 cm−2 for 8-hydroxy-2′-deoxyguanosine, guanine, sunset yellow and benomyl, respectively. Considering the huge application potential of two-dimensional carbon nanosheets, it is believed that the newly synthesized N, P-codoped CNS can play a much greater role for other applications.

Highly efficient Cd(Ⅱ) removal using 3D N-doped carbon derived from MOFs: Performance and mechanisms

Cadmium (Cd) removal is imperative to ensure the safety of aquatic-ecosystem, yet its effective removal technology has remained elusive by far. To address this concern, three-dimensional N-doped carbon (NC) polyhedrons affording ample porosity is fabricated based upon the thermal carbonization and KOH activation of zeolitic imidazolate framework-8 (ZIF-8) precursor. Thus-derived activated NC (a-NC) adsorbent not only overcomes the inherent instability of ZIF-8 but also harvests a maximum Cd(Ⅱ) adsorption capacity of 370.2 mg g−1, which evidently surpasses those of bare NC counterpart as well as previously reported adsorbents. Impressively, a-NC achieves ca. 100% removal of aqueous Cd(Ⅱ) in a broad working pH range (5−9), and particularly attains stable performances (81−92%) in various realistic water. Theoretical calculations in combination with experimental characterizations further offer mechanistic insight into the enhanced removal exerted by a-NC. Notably, owing to the increased specific surface area (3041 vs. 389 m2 g−1) and enhanced sp2 carbon content (91.7 vs. 68.8%) of a-NC as compared to NC, advanced Cd(Ⅱ) adsorption via a-NC can be exhibited. Our designed a-NC material harnessing favorable recycling capability would be in particular attractive in the realm of practical Cd(Ⅱ) remediation.

Few-Layered WS2 Anchored on Co, N-Doped Carbon Hollow Polyhedron for Oxygen Evolution and Hydrogen Evolution.

Tungsten disulfide (WS2) is well known to have great potential as an electrocatalyst, but the practical application is hampered by its intrinsic inert plane and semiconductor properties. In this work, owing to a Co-based zeolite imidazole framework (ZIF-67) that effectively inhibited WS2 growth, few-layered WS2 was confined to the surface of Co, N-doped carbon polyhedron (WS2@Co9S8), with more marginal active sites and higher conductivity, which promoted efficient oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). For the first time, WS2@Co9S8 was prepared by mixing in one pot of a liquid phase and calcination, and WS2 realized uniform distribution on the polyhedron surface by electrostatic adsorption in the liquid phase. The obtained hybrid catalyst exhibited excellent OER and HER catalytic activity, and the OER potential was only 15 mV at 10 mA cm-2 higher than that of noble metal oxide (RuO2). The improvement of catalytic activity can be attributed to the enhanced exposure of sulfur edge sites by WS2, the unique synergistic effect between WS2 and Co9S8 on the metal-organic framework (MOF) surface, and the effective shortening of the diffusion path by the hollow multi-channel structure. Therefore, the robust catalyst (WS2@Co9S8) prepared by a simple and efficient synthesis method in this work will serve as a highly promising bifunctional catalyst for OER and HER.

Nitrogen-Doped Carbon Polyhedrons Confined Fe-P Nanocrystals as High-Efficiency Bifunctional Catalysts for Aqueous Zn-CO2 Batteries.

Emerging Fe bonded with heteroatom P in carbon matrix (FePC) holds great promise for electrochemical catalysis, but the design of highly active and cost-efficient FePC structure for the electrocatalytic CO2 reduction reaction (CO2 RR) and aqueous ZnCO2 batteries (ZCBs) is still challenging. Herein, polyhedron-shaped bifunctional electrocatalysts, FeP nanocrystals anchored in N-doped carbon polyhedrons (Fe-P@NCPs), toward a reversible aqueous ZnCO2 battery, are reported. The Fe-P@NCPs are synthesized through a facile strategy by using self-templated zeolitic imidazolate frameworks (ZIFs), followed by an in situ high-temperature calcination. The resultant catalysts exhibit aqueous CO2 RR activity with a CO Faradaic efficiency up to 95% at -0.55V versus reversible hydrogen electrode (RHE), comparable to the previously best-reported values of FeNC structure. The as-constructed ZCBs with designed Fe-P@NCPs cathode, show the peak power density of 0.85mW cm-2 and energy density of 231.8Wh kg-1 with a cycling durability over 500 cycles, and outstanding stability in terms of discharge voltage for 7 days. The high selectivity and efficiency of the battery are attributed to the presence of highly catalytic FeP nanocrystals in N-doped carbon matrix, which can effectively increase the number of catalytically active sites and interfacial charge-transfer conductivity, thereby improving the CO2 RR activity.

Co/CoO nanoparticles armored by N-doped nanoporous carbon polyhedrons towards glucose oxidation in high-performance non-enzymatic sensors

The Co/CoO nanoparticles armored by porous N-doped carbon polyhedrons were successfully prepared from ZIF-67 via a pyrolysis-reorganization method, demonstrating excellent sensing performance towards glucose oxidation.

Pearl necklace-like CoMn-based nanostructures derived from metal-organic frames for enhanced electromagnetic wave absorption

Metal-organic frames derived magnetic nanostructures have potential applications in various fields. However, the magnetic particles in the derivatives are frequently agglomerated, limiting their physicochemical properties. Herein, we cross CoZn-MOF particles through ultra-long MnO2 nanowires (MnO2@CoZn-MOF) as precursor for high-performance functional materials. After the carbonization of the MnO2@CoZn-MOF, MnO2 nanowires were transformed into MnO nanowires coated with N-doped carbon layer (MnO@CN), while the CoZn-MOFs were converted into N-doped carbon polyhedron particles encapsulated with Mn3Co7 alloy nanoparticles (Mn3Co7@CN), leading to the formation of hierarchically pearl necklace-like nanostructure (CoMn@CN). The magnetic Mn3Co7@CN nanoparticles are separated uniformly along one-dimensional MnO@CN nanowires, and thus the self-agglomeration of magnetic nanoparticles is avoided efficiently. As a result, the CoMn@CN exhibits excellent electromagnetic wave absorption property with an effective absorption bandwidth of 5.24 GHz as the matching thickness is only 2.0 mm. Experimental results and theory calculations indicate that the improved conductive loss and dielectric relaxation loss caused by abundant heterointerfaces and the electronic interaction between Co and Mn atoms are responsible for the excellent electromagnetic wave absorption performance. Our strategy provides an efficient way for the synthesis of high-performance MOFs-derived nanostructures.