APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Jiangfeng Yuan,Hanqing Yin,Xiaoxin Jin,Dan Zhao,Yuan Liu,Aijun Du,Xiaoqiang Liu,Anthony P. O’Mullane
Ammonia production is an energy-intensive process while nitrite ions are a substantial environmental pollutant, therefore the conversion of nitrite ions (NO 2 - ) into ammonia (NH 3 ) via an electrochemical process is of great significance. Using a hydrothermal method plus a low temperature phosphating process, iron phosphide nanoarrays (FeP NA) were prepared on a Ti plate to form FeP NA|Ti, which was then used to efficiently convert NO 2 - ions into NH 3 . In a single-chamber cell using a neutral pH electrolyte, the Faradaic efficiency for nitrite to ammonia conversion reached 82.5 ± 2.3 %. Various parameters were optimized to ensure the high performance of FeP NA|Ti which were explained with mechanistic studies. It was found that atomic hydrogen (H*) greatly impacts both the reaction rate and selectivity. Furthermore, density functional theory (DFT) calculations reveal that the (211) and (011) facets of FeP are the main active faces for nitrite reduction where the nitrite ions tend to bind with two adjacent Fe atoms of FeP to ensure maximum performance.
研究领域:
环境科学
·
材料科学
·
化学工程
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产品关联
DOI
高影响因子
Nano Research
·
2023
·
IF 9.9
Wang Daji,Wang Jie,Liu Dan,He Jiuyang,Wang Meiying,Huang Haibing,Nie Guohui,Ding Hui,Yan Xiyun
The correlation between Epstein-Barr virus (EBV) infection and nasopharyngeal carcinoma (NPC) risk has been extensively researched. The continual monitoring of EBV-IgAs provides a promising approach of NPC screening in its early stage. In this study, we successfully synthesized a single-atom nanozyme (SANzyme) through the application of iron-porphyrin based metal organic framework (MOF-FeP). The MOF-FeP possesses precisely-defined electronic and geometric structures that accurately mimic highly-evolved catalytic site of natural peroxidase. The peroxidase-like activity of MOF-FeP enables it to catalyze the chemiluminescence of luminol substrate. By integrating MOF-FeP into a traditional strip, we created a rapid and highly-sensitive evaluation tool for detecting EBV-IgAs. Importantly, the MOF-FeP strip enables the simultaneous detection of three EBV-IgAs, greatly improving the accuracy of EBV-associated NPC screening. The sensitivities of the MOF-FeP strip (75.56%–93.30%) surpass those of current enzyme-linked immunosorbent assay (ELISA) methods (64.44%–82.22%). This test takes only 16 min to perform as opposed to the customary 1–2 h required for standard ELISA. Additionally, the MOF-FeP strip is suitable for whole blood samples, thereby significantly simplifying the sample preparation and detection process. In conclusion, the MOF-FeP strip combines the simplicity of traditional strip with the high catalytic activity of SANzyme. Our innovative MOF-FeP strip offers a new point-of-care strategy for EBV-IgAs detection, which is expected to markedly facilitate early screening for EBV-associated diseases.
研究领域:
癌症生物学
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分子诊断
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纳米技术
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生物医学工程
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产品关联
DOI
高影响因子
Inorganics
·
2024
·Vol. 12
·期 11
·291
·
IF 3.1
Jianguo Zhong,Ting Zhang,Jianqiang Tian,Wei Gao,Yuxin Wang
Transition metal phosphides (TMPs) show great potential as catalysts for the hydrogen evolution reaction (HER). FeP stands out as an efficient and cost-effective non-noble metal-based HER catalyst. However, FeP tends to aggregate and suffer from instability during the reaction. To tackle these challenges, we developed an efficient and straightforward approach to load metal-organic framework-derived N/P co-doped carbon-encapsulated FeP nanoparticles onto a nickel foam substrate (FeP@NPC/NF-450). This catalyst exhibits exceptional HER activity in 0.5 M H2SO4and 1.0 M KOH solutions, with overpotentials of 68.3 mV and 106.1 mV at a current density of 10 mA cm−2, respectively. Furthermore, it demonstrates excellent stability with negligible decay over 48 h in both acidic and alkaline solutions. The outstanding hydrogen evolution catalytic performance of FeP@NPC/NF-450 is mainly due to the N, P co-doped carbon matrix, which safeguards the FeP nanoparticles from aggregation and surface oxidation. Consequently, this enhances the availability of active sites during the hydrogen evolution reaction (HER), leading to improved stability. Moreover, introducing nickel foam offers a larger specific surface area and enhances charge transfer rates. This study provides a reference method for preparing stable and highly active electrocatalysts for hydrogen evolution.
研究领域:
材料科学
·
催化化学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Qing Ye,Xuanhao Hu,Yupei Fu,Yongliang Cheng
The rational design and construction of amorphous/crystalline heterostructures with multiphasic interfaces represents an effective approach to enhance the oxygen evolution reaction (OER) activity of transition metal phosphides (TMP)-based electrocatalysts. Herein, we report a CoP/Ni 2 P@FeP heterostructured nanofibers electrocatalyst (CoP/Ni 2 P@FeP NFs) via electrospinning, oxidation, in situ growth of CoNiFe-PBA nanocubes and subsequent phosphorization, in which amorphous Co and Ni co-doped FeP nanosheets are anchored on crystalline nanofibers composed of CoP and Ni 2 P. Electrochemical tests combined with theoretical calculations demonstrates that the construction of the amorphous/crystalline heterostructure with triphasic interfaces induces electronic rearrangement of CoP/Ni 2 P@FeP NFs, which leads to the upshift of the O 2p band center of the CoNiFeOOH species formed after surface reconstruction, thereby facilitating the OER through the LOM pathway and ultimately enhancing the intrinsic catalytic activity. As a result, the CoP/Ni 2 P@FeP NFs exhibits low overpotentials of 256, 297 and 311 mV to achieve high current densities of 100, 500 and 1000 mA cm −2 , respectively. Moreover, the electrolytic cell assembled with CoP/Ni 2 P@FeP NFs and Pt/C only requires voltages of 1.508, 1.607 and 1.690 V to deliver current densities of 100, 500 and 1000 mA cm −2 , respectively, and exhibits outstanding long-term stability at 200 mA cm −2 for 200 h.
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产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2020
·Vol. 8
·期 33
·7494-7500
·
IF 5.344
Chan Song,Weiwen Zhao,Haibo Liu,Wei Ding,Linlin Zhang,Jie Wang,Yuewei Yao,Cheng Yao
In the past few years, the development of novel nanozymes with excellent performance has attracted increasing attention in biosensing. However, most of those nanozymes were found to possess peroxidase activity with the prerequisite of the presence of H2O2. In contrast, oxidase mimics can catalyze the oxidation of substrates without H2O2, delivering a higher signal-to-noise ratio than that of peroxidase mimics in practical applications. Herein, for the first time, two-dimensional (2D) nanosheets composed of iron phosphide embedded in a carbon matrix (FeP@C nanosheets) were found to demonstrate a robust oxidase-like property, different from those previously reported peroxidase mimics based on transition metal phosphides (TMPs). Based on this intriguing observation, the fluorescent substrate Amplex Red (AR) of peroxidase can be effectively oxidized by FeP@C nanosheets in the absence of H2O2. Benefiting from the oxidase-like enzymatic activity of the FeP@C nanosheets, a novel fluorescence sensing platform was developed for the detection of cysteine (Cys) and Cu2+. The outstanding performance of the 2D FeP@C nanosheets endows the proposed platform with superior sensitivity and selectivity compared to many previously reported approaches. Besides, the inherent features of simplicity, being label free, and low cost also allow this methodology to stand out among many other strategies, revealing its huge potential in practical analysis and detection applications.
研究领域:
生物传感
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材料科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2021
·Vol. 306
·期 7
·2100086
·
IF 4.367
Tangjian Cheng,Genpin Lv,Yitao Li,Hao Yun,Lingfei Zhang,Yongmao Deng,Liping Lin,Xiangjun Luo,Junmin Nan
The low dielectric polymer films have drawn great attention to the application as the dielectric insulating materials in high-frequency circuit boards, while the weak adhesion to the copper foils and the poor processability resulted from the fluorinated or rigid structures limited their high-frequency application. In this work, the low dielectric and high adhesive polyimide/fluorinated ethylene propylene (PI/FEP) nanocomposite film for high-frequency flexible circuit board application is developed. It is indicated that the fluorocarbon surfactants can significantly improve the dispersion of FEP in PI substrate, and thus, the PI/FEP nanocomposite film exhibits excellent mechanical properties, including the tensile strength increases to 46.6 MPa and the elongation at the break increases to 13.7%. Importantly, at the high-frequency of 10 GHz, the 60 wt% FEP filled PI nanocomposite film displays an ultralow dielectric loss (0.006) and a reduced dielectric constant (2.69). In addition, the high-frequency flexible circuit board with the PI/FEP film as the dielectric insulating layer has a high peel strength of 0.75 N mm −1 , indicating this PI/FEP nanocomposite film can meet the requirements of the high-frequency flexible circuit board application.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Energy & Fuels
·
2022
·Vol. 6
·期 4
·1084-1093
·
IF 6.813
Meilian Gao,Pingping Gao,Ting Lei,Chun Ouyang,Xiaobo Wu,Anru Wu
A novel porous iron phosphide (p-FeP) loading on nitrogen-doped carbon fiber/carbon paper (p-FeP/NCF/CP) as highly effective self-supporting catalysts for the hydrogen evolution reaction (HER) is synthesized by a three-step approach, including N-doped carbon fiber network preparation, porous FeOOH/NCF/CP precursor by selectively etching, and subsequent phosphorization process. The as-obtained p-FeP/NCF/CP composite exhibits a higher specific surface area and larger porosity in comparison to FeP/CP composite due to the rich porous structure and 3D network of the N-doped carbon fiber matrix (NCF). Electrochemical measurements demonstrate that p-FeP/NCF/CP composite exhibits an excellent electrocatalytic activity for HER with small overpotentials of 63 mV and 96 mV at 10 mA cm−2 current density in 0.5 M H2SO4 and 1.0 M KOH, respectively. The p-FeP/NCF/CP material also exhibits a small Tafel slope and charge transfer resistance as well as good stability and durability in pH 7 and pH 14.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Zhenxin Zhao,Rajesh Pathak,Xiaomin Wang,Zhewei Yang,Huijun Li,Qiquan Qiao
The sluggish redox kinetics and shuttling effect result in low sulfur utilization, large polarization and rapid capacity decay of lithium-sulfur batteries. Here, we develop iron phosphide nanoparticles/reduced graphene oxide composites (FeP/rGO) as sulfiphilic host materials, which not only immobilize the polysulfides but also facilitate the fast charge transport kinetics, contributing to the reduced polarization and effective adsorption–diffusion–conversion interface of polysulfides . Moreover, the superficial oxidation of FeP nanoparticles helps to enhance the catalytic effect, facilitating a higher coulombic efficiency. As a consequence, the optimized S@FeP/rGO exhibits a high initial capacity of 1467 mAh g −1 at 0.1 C with a sulfur utilization of 87.7% and stable cycling stability with a capacity retention of 646 mAh g −1 at 1 C after 500 cycles. Even with a high sulfur loading of 6.1 mg cm −2 , the cell can still deliver an initial capacity of 835 mAh g −1 at 0.2 C. In addition, the modified separator using FeP/rGO composites also exhibits excellent electrochemical performance . The current work provides a proof-of-concept study and practical application of S@FeP/rGO positive electrode in the lithium-sulfur batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Ying Deng,Zhenyu Xiao,Zuochao Wang,Jianping Lai,Xiaobin Liu,Dan Zhang,Yi Han,Shaoxiang Li,Wei Sun,Lei Wang
Following the guidance of nitrogenase, the natural iron-based catalysts with remarkably high activity in nitrogen reduction reaction (NRR) may be a talent option to develop artificial molecular mimics. However, the electrochemical NRR process of iron-based catalysts still suffers from the high overpotential, poor lifespan, and slow reaction kinetics of the hydrogenation process. Through a controllable etching and in-situ carbonating process, a Pt-doped FeP/C hollow nanorod catalysts was fabricated. Driven by the doped Pt atom, the catalyst solves the key kinetic problem about insufficient proton feeding in the process of nitrogen reduction, and actively transfers protons to intermediates of the hydrogenation steps in NRR. Moreover, the as-prepared catalyst presents the highest NH 3 yield value of 10.22 μg h −1 cm −2 among multitudinous Fe based catalysts at lower potential of −0.05 V ( vs . RHE) with an excellent Faraday efficiency (FE) of 15.3 %, which is higher than FeP/C without the Pt-driven proton-feeding effect, and the cathodic current density presents no significant change within 50 h. In addition, the density functional theory (DFT) and Attenuated total reflection surface-enhanced infrared absorption spectrum (ATR-SEIRAS) results verify the reaction path and protons-feeding kinetic process.
研究领域:
材料科学
·
电化学
·
催化作用
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Haifeng Zhou,Malin Cui,Yuan Zhao,Chan Wang,Qijun Song
Nitrogen and iron phosphides (i.e., FeP) doped carbon nanotubes (N/FeP-CNT), featured with multi-element co-doping, multi-active sites, and uniform distribution were prepared and characterized. The synergistic effect of nitrogen doped carbon nanotubes (N-CNT) and FeP improved the electrical conductivity and electrocatalytic properties of the modified electrode , which provided a new analysis platform for simultaneous detection of dihydroxybenzoic acid isomers (DHBA isomers). Low detection limits (i.e., 124, 65, and 221 nmol L −1 for 2,4-DHBA, 3,4-DHBA, and 2,5-DHBA, respectively) and wide detection range (i.e., 0.5-600, 0.5-560, and 0.5–820 μmol L −1 for 2,4-DHBA, 3,4-DHBA, and 2,5-DHBA, respectively) were obtained for DHBA isomers. In addition, the electrode exhibited good anti-interference ability and long-term stability for the determination of DHBA isomers.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
ChemCatChem
·
2024
·Vol. 17
·期 3
·e202401364
·
IF 3.8
Haixia Li,Dan Li,Chuanqiang Yin,Feigao Xu
Graphical FeP/CdS Z-type heterojunction photocatalysts were successfully prepared by a facile hydrothermal method. Experimental results demonstrated that FeP/CdS composite photocatalysts have excellent performance in the catalytic degradation of TCH with the help of activated H 2 O 2 .The construction of Z-type heterostructures provided an effective photogenerated electron transfer channel, which facilitated its separation and utilization as well as accelerated the cycling of Fe 3+ /Fe 2+ . Photocatalysis is an efficient technology for the degradation of pollutants. However, it still needs to be improved. In this study, magnetic Z-scheme FeP/CdS composites heterojunction photocatalysts were prepared by a facile hydrothermal method, and the structure, morphology, optical, and photocatalytic properties of the prepared composites were investigated in detail. The efficiency of tetracycline hydrochloride (TCH) removal by FeP/CdS composites was investigated under different reaction conditions (including different FeP and CdS ratios, catalyst dosage, hydrogen peroxide consumption, temperature, and initial pH). FeP/CdS composites exhibited better catalytic performance compared with pure components. The F 1 Cd 1 composite (mass ratio of FeP to CdS is 1:1) achieved 92.7% removal efficiency of TCH; moreover, the F 1 Cd 1 composite still exhibits a high stability after five consecutive cycles. The capture experiments on the active material showed that the removal of TCH by the F 1 Cd 1 composite was mainly dominated by •OH; however, •O 2 − , e − , and h + played a minor role, and the degradation mechanism was revealed by combining various characterization techniques. The introduction of cadmium sulfide formed an effective photogenerated carrier transport channel at the interface with the iron phosphide surface, which could accelerate the transfer and separation of photo-excited e − /h + pairs, thus improving the degradation performance of TCH.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Xin Zhao,Zheng Zhang,Xun Cao,Jun Hu,Xinghua Wu,Andrew Yun Ru Ng,Guo-Ping Lu,Zhong Chen
In this study, we conduct comprehensive experimental and theoretical investigations on the hydrogen evolution reaction (HER) preformation of FeP electrode in acidic and alkaline solutions. Theoretically, bulk Fe-O bond is unfavorable, but surface Fe-O bond is favorable and plays a negative role for HER. The presence of oxygen bonds (native or formed during reaction) is the root source of the reduced HER activity. Surface treatment in 37% HCl solution removes the oxide layer and significantly improves the HER performance, especially in alkaline solution. After etching, the overpotentials in 0.5 M H 2 SO 4 are 79 and 95 mV at 10 and 20 mA cm −2 , respectively. The ones in 1 M KOH are 95 and 102 mV at 10 and 20 mA cm −2 , respectively. Long-term instability in alkaline solution is caused by the presence of oxygen in the electrolyte. Good stability can be realized by removing oxygen from the solution.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）