Electrocatalysis
·
2017
·Vol. 9
·期 2
·264-270
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IF 2.398
Zhang Lulu,Chen Yongting,Zhao Pingping,Luo Wei,Chen Shengli,Shao Minhua
One of the main challenges to generate hydrogen is to develop cheap and highly active electrocatalysts toward hydrogen evolution reaction (HER). Herein, Fe 3 C nanorods encapsulated in N-doped carbon nanotubes (Fe 3 C@NCNT) were synthesized by a simple method involving the pyrolysis of a Fe-based metal organic framework (MOF) and melamine. The hybrid composite showed an excellent catalytic activity toward HER in an acidic electrolyte. The overpotential at the current density of 10 mA cm −2 was only 154 mV in a 0.5 M H 2 SO 4 solution, which was lower than most of the non-precious metal and metal-free catalysts. Density functional theory (DFT) calculation results suggested that the synergistic effect between Fe 3 C nanorods and N dopants could effectively tune the H adsorption energy on carbon resulting in an enhanced HER activity.
Graphical Abstract
研究领域:
材料科学
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能源化学
·
理论计算
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yuning Wang,Wenrui Yao,Zehuai Li,Haiyan Tan,Ce Sun,Dingyuan Zheng,Yanhua Zhang
The extensive use of organic dyes has led to significant water pollution. Using lignocellulosic waste as a precursor for catalysts preparation for sewage remediation presents an effective alternative with numerous advantages in sustainability, cost-effectiveness, and environmental compatibility. In this work, wood fiber waste collected from wood processing plants was decorated with Prussian blue (PB) and then annealed to produce carbonized wood fiber catalyst (Fe 3 C@Fe-CB). In the presence of peroxymonosulfate (PMS), the prepared catalyst could achieve over 98.69 % efficiency in degrading methylene blue (MB) solutions (20 mg/L) in 60 min across a pH range of 3 to 11. Electrochemical test and electron paramagnetic resonance (EPR) analysis respectively verified that electron transfer pathway and radical pathway were the key factors for the degradation of MB. Cyclic degradation tests demonstrated that the degradation efficiency remained above 93.67 % after five recycling experiments. Moreover, the used magnetic catalyst can be easily recycled by magnet. This study proposed a facile and sustainable carbonized wood fiber catalyst decorated by Fe 3 C@Fe-CB, which could realize efficient elimination of organic dyes. Moreover, we offered a novel choice for dyes-polluted water treatment and paving a new route for converting low-value lignocellulosic waste to high-value utilizations.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2021
·Vol. 13
·期 42
·17920-17928
·
IF 7.79
Liangliang Feng,Xiao Zhang,Jianfeng Huang,Danyang He,Xiaoyi Li,Qianqian Liu,Yongqiang Feng,Guodong Li,Guanghui Xu,Liyun Cao
The development of cost-effective, high-efficiency bifunctional electrocatalysts as alternatives to the state-of-the-art Pt-based materials toward the hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR) is of great significance but still challenging. Herein, an advanced bifunctional electrocatalyst is presented, composed of Fe2P encapsulated in carbon nanowalls decorated with well-dispersed Fe3C nanodots (denoted as Fe2P@Fe3C/CNTs), which is achieved by a novel “inside-out” gas–solid reaction protocol. When functioning as a cathodic catalyst for water splitting, the Fe2P@Fe3C/CNT catalyst needs an ultralow overpotential of 83 mV to deliver a current density of 10 mA cm−2, shows a small Tafel slope of 53 mV dec−1 and ensures long-term stability for over 200 h in an alkaline electrolyte. Notably, the Fe2P@Fe3C/CNT catalyst exhibits an extremely impressive ORR performance with an onset potential (Eonset) of 1.060 V and a half-wave potential (E1/2) of 0.930 V, excellent stability (≈94% activity retention after 36 000 s), and a strong methanol resistance ability, even far outperforming commercial Pt/C (Eonset = 0.955 V, E1/2 = 0.825 V, ≈75% activity retention after less than 3500 s). Such outstanding HER and ORR performances are mainly ascribed to the improved corrosion resistance of the unique Fe2P@C core–shell structures, the abundant catalytically active sites of ultrasmall Fe3C nanodots incorporated in carbon nanowalls, and the good electrical conductivity of 2D graphitic carbon nanotubes used as a support.
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Jing Li,Junjie Yang,Hui Ren,Xinhui Wang,Yuecheng Xu,Yong Guo,Dan Xiao
In this study, we present an electrochemical sensor with superior sensitivity and selectivity for dopamine (DA) detection. The sensor was created using a nanocomposite of iron-iron carbide nanoparticles decorated with carbon nanotubes (Fe-Fe 3 C@CNTs) to modify a glassy carbon electrode (GCE). The Fe-Fe 3 C@CNTs nanocomposite can be synthesized by a facile microwave-assisted synthesis method with just adopting ferrocene and carbon fiber as raw material and heat source, respectively. The electron microscopy (EM) results indicate that the Fe-Fe 3 C nanoparticles encapsulated with graphitic layer were decorated with CNTs. An investigation of the electrochemical responses of the Fe-Fe 3 C@CNTs/GCE sensor to DA was performed using both cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Notably, in ideal experimental settings, the sensor demonstrated a minimal limit of detection (LOD) of 0.01 μM within a range of linearity from 0.05 to 40 μM, even under a high concentration of uric acid (UA) interference. Moreover, the utility of the produced Fe-Fe 3 C@CNTs/GCE sensor was further validated through successful DA testing in urine samples of human.
研究领域:
材料科学
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分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Chuanyi Guo,Chaofa Chen,Jiaying Lu,Du Fu,Cheng-Zong Yuan,Xi-Lin Wu,Kwun Nam Hui,Jianrong Chen
Stable and recyclable catalysts are crucial to the peroxymonosulfate (PMS) based advanced oxidation process (AOPs) for wastewater treatment . Herein, nitrogen-rich carbon wrapped Fe 3 C (Fe 3 C@CN) on carbon felt (CF) substrate was synthesized by using Prussian blue (PB) loaded CF as the precursors. The obtained Fe 3 C@CN/CF catalyst was applied for degradation of bisphenol A (BPA) via the heterogeneous catalytic activation of PMS. Results showed that ~91.7%, 95.2%, 98.1% and 99.1% of BPA (20 mg/L) were eliminated in the Fe 3 C@CN/CF + PMS system within 4, 10, 20 and 30 min, respectively. The fast degradation kinetics is attributed to the production of abundant reactive species ( OH, SO 4 − and 1 O 2 ) in the Fe 3 C@CN/CF + PMS system, as demonstrated by the electron paramagnetic resonance spectroscopy and quench experiments. The Fe 3 C@CN/CF catalyst was stable and can be easily recycled by using an external magnet. The results indicated that the nanoconfined Fe 3 C endowed Fe 3 C@CN/CF with high stability and magnetic property and enabled the efficient electron transfer for PMS activation. This study provides a cost-effective approach for the fabrication of stable and recyclable Fe 3 C@CN/CF catalyst, and shed a new light on the rational design of multifunctional catalyst for advanced water remediation.
研究领域:
环境科学
·
催化材料
·
废水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Nano Research
·
2024
·
IF 0.8
Hong Wu Zhu,Yu Song Pan,Yuan Qing Wang,Yan Lei Xiang,Rong Han,Run Huang
Recoverable and stable nanocatalysts are essential for peroxymonosulfate - based advanced oxidation processes (AOPs) in wastewater purification treatment. In this paper, Fe3C nanorods @ nitrogen-doped carbon composites (N-Fe3C@C) with core-shell architecture were fabricated by the co-precipitation and calcination methods, and characterized and analyzed in terms of their crystal structure, microscopic morphology, and surface chemical elements. In addition, N-Fe3C@C-4 degraded 85.36% of tetracycline in 10 min under PMS, which was much higher than the catalytic ability of Fe3O4 (42.03% in 10 min). Both the active radical trapping and EPR experiments verified that 1O2 played a key role for degradation of organic dyes in PMS system. The investigation on the degradation mechanism revealed that the presence of the carbon layer facilitated to adsorb TC, accelerate free radical generation and promote the redox cycle of Fe2+/Fe3+ in the nanocatalyst. This study offers novel ideas for multifunctional catalysts for advanced wastewater purification treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Zhefu Li,Binling Chen,Xianfeng Wang,Jun Nie,Guiping Ma
In this work, a novel catalyst of oxygen reduction reaction (ORR) was designed and fabricated by electrospinning, photo-curing and carbonization, based on polymer poly(dimethylsilylene ethynylenephenyleneethynylene) (PMSEPE) and metal organic frameworks (MOFs)—Materiaux de l'Institute Lavosier-101(Fe) (MIL-101(Fe)). The optimal catalyst PMSEPE/MIL-101(Fe)-800, which was carbonized at 800 °C, presented a bamboo-like nanofiber structure with a high degree of graphitization, a high specific surface area (302.3 m 2 /g) and a high yield (64.17%). Fe 3 C particles were found to be encapsulated into the Fe-Si-N co-doped carbon nanofibers. In the electrochemical tests, PMSEPE/MIL-101(Fe)-800 showed an onset potential of 0.935 V ( vs . RHE) and a diffusion limit current of 6.01 mA/cm 2 ( vs . RHE) in 0.1 M KOH aqueous solution, of which performances are competitive to commercial 20 wt% Pt/C. PMSEPE/MIL-101(Fe)-800 also exhibited a higher methanol tolerance and duration stability. Further Zn-air battery test used by PMSEPE/MIL-101(Fe)-800 suggested its potential for the application of fuel cell.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Huaqi Wang,Chenghong Sun,Enze Zhu,Chaoyang Shi,Jie Yu,Mingli Xu
Metal–organic framework (MOF)-derived carbon materials have emerged as important candidates in the field of catalysis because of their simple synthesis, easy construction, good conductivity, and high catalytic activity. Fe 3 C nanoparticles prepared from MOFs facilitate the catalytic activity of adjacent single atoms and exhibit powerful catalytic properties. In this work, a composite structured catalyst with Fe 3 C, Co nanoparticles, and M-N x single atoms (M = Co, Fe) was synthesized (denoted as Fe 3 C-Co-NC) by constructing Fe-doped bilayer zeolitic imidazolate frameworks (ZIFs) with a core–shell structure, which were used as bifunctional catalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). The Fe 3 C-Co-NC catalyst exhibits superior half-wave potential ( E 1/2 = 0.89 V) and overpotential ( E j=10 = 1.67 V) and outperforms the commercial Pt/C and RuO 2 . This result can be attributed to the high specific surface area, hierarchical pore structure , and high graphitization degree of the Fe 3 C-Co-NC catalyst, especially the synergistic effect between Fe 3 C and adjacent single-atom active sites. Specifically, the Zn–air battery assembled using the Fe 3 C-Co-NC catalyst displays high peak power density (203 mW cm −2 ) and specific capacity (815 mAh g −1 ) without degradation after charge/discharge cycles for 57 h. Therefore, this work offers important insights into the design and research of high-performance ORR/OER bifunctional catalysts.
研究领域:
催化材料
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2025
·
IF 5.1
Na Yang,Jiarui Xue,Yuanxiao Ji,Jiyuan Zhang,Weiye Zhang,Xuexia He,Qi Li,zhibin lei,Zonghuai Liu,Jie Sun
Lithium Sulfur (Li-S) batteries have attracted great attention in recent years due to their high theoretical energy density (2600 Wh kg-1) and specific capacity (1675 mAh g-1), abundant reserves and environmental friendly. However, the well-known poor electrical conductivity of sulfur/Li2S, shuttle effect of Lithium Polysulfides (LiPSs) and the in-situ formation of lithium dendrites during cycling process extremely hinders the large fabrication of Li-S batteries. In this work, we have designed and prepared a Poly (3,4-ethylenedioxythiophene) (PEDOT) and Fe3C nanoparticles co-decorated Carbon Nanofibers (CNFs) membrane as a self-supporting Li2S host to enhance the electrochemical performance of Li-S batteries. The PEDOT coating layer can tightly connect Fe3C nanoparticles with the CNFs to form a conductive network, which significantly enhancing the conductivity of the cathode. At the same time, the strong chemical adsorption of PEDOT and the catalytic effect of Fe3C can effectively accelerate the conversion kinetics of LiPSs, thereby improving the battery performance. As a result, the optimized PEDOT@CNFs@Fe3C-16wt%/Li2S composite cathode can achieve a high initial specific capacity of 816 mAh g-1 at the current density of 0.1 C. While such cathode also exhibits only 0.033% capacity decay per cycle at 0.5 C after 1000 cycles, showing its advantages as a high-performance self-supporting flexible Li-S composite cathode.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Yiming Liu,Chaojie Lyu,Jiarun Cheng,Chunyang Guan,Xueyan Li,Jing Zhang
Strengthening the interaction between nanoparticles and support is advantageous to modulate the electronic structure and improve catalytic performance. Here, NH 2 -MIL-88B(Fe) is transformed into the Fe 3 C nanoparticles loaded on nitrogen-doped carbon materials (Fe 3 C@N-C) by calcination and acid-leching processes. N atoms doping adjusts the π-electron structure and enhances surface electrophilicity of carbon skeleton, which strengthens the interaction with Fe 3 C nanoparticles and adjusts the d-electron structure of Fe atoms. Such significant improvement enhances the decomposition of H 2 O molecules and the adsorption of H* intermediates. Ultimately, Fe 3 C@N-C exhibits superior electrocatalytic HER performance in wide pH range compared to non-nitrogen doped Fe 3 C@C material. Furthermore, the two-electrode system assembled with Fe 3 C@N-C and NiFe LDH also exhibits excellent overall water splitting performance in alkaline media, requiring only 1.53 V to achieve 10 mA cm −2 . This work provides strong practical and theoretical foundations for further expanding the heteroatom doping strategy to regulate the interaction between metal and supports.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Shaowei Jin,Jianfeng Gao,Guang Li,Hui Zhang,Zhaoshun Zhang,Qun Yang,Changcheng Lin,Xueqin Zuo,Shiwei Shi
Solar-driven interfacial evaporation technology has great potential in solving the global challenge of freshwater shortage. However, the selection of excellent photothermal conversion materials is a challenging task. To achieve efficient solar interface evaporation materials, we developed a new material loaded with Fe/Fe3C nanoparticles on mesoporous carbon hollow spheres(MCHS). As an interfacial evaporation material, Fe/Fe3C@MCHS-x has an evaporation rate of 1.633 kg m-2 h-1 and an energy conversion efficiency of 94.17 %(Fe/Fe3C@MCHS-2). The innovative introduction of magnetic particles into the evaporation unit allows the metal nanoparticles to absorb light at their resonance wavelength. This absorption leads to the excitation of electrons from the occupied state to the unoccupied state, and the diffusion of thermoelectron leads to the increase of carriers, which makes the interface temperature rise rapidly. The composite material has a certain degree of organic pollution treatment capability along with high-efficiency water evaporation, which provides new ideas for interfacial evaporation material technology.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Bai Jiang,Jianxun Shang,Faying Zhang,Na Li,Yan Wang,Zuming Hu,Junrong Yu
In order to face the challenge of achieving high-efficiency and lightweight wave absorption materials, we prepared the poly-m-phenylene isophthalamide (PMIA)/TiO 2 /Fe 3 C (PTF) composites with hollow structure by coaxial electrospinning and carbonization process. PMIA as the carbon source provided a three-dimensional (3D) conductive network, using TiO 2 and Fe 3 C to improve the impedance matching, reinforce the hollow structure, and increase the absorption mechanism of composites. Significantly, the minimum reflection loss (RL min ) value of optimal material is −58.1 dB at 14.88 GHz and the effective absorption bandwidth (EAB) of 6 GHz with the matching thickness of 2.3 mm, and the filling content is only 13 wt%. The excellent absorption property is maintained even after heating, immersing, and long-term use. This work provides the reference of hollow carbon nanofiber absorbers with excellent comprehensive properties and has more powerful practicability in a variety of environmental conditions.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）