ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Qijian Niu,Junxia Guo,Yunhui Tang,Xindong Guo,Jun Nie,Guiping Ma
In this work, a bimetal-organic framework/graphene oxide with sandwich-type structure as a precursor is prepared by the solvent-thermal approach. A nanoporous reduced graphene oxide (rGO) nanosheets enriched with Fe, Co and N (Fe/Co-N) co-doped active sites is prepared followed by a high temperature carbonization and acid leaching (AL) process. When the molar ratio of Fe/Co is 0.40 before carbonization , the prepared sample exhibits optimized electrocatalytic activity (a high onset potential (0.98 V vs. RHE), half-wave potential (0.84 V vs. RHE), and a large limiting current density (-5.46 mA cm −2 at 0.21 V vs. RHE) as oxygen reduction reaction (ORR) electrocatalysts . Most importantly, the duration stability and methanol tolerance of the as-prepared sample are better than common commercial 20 wt% Pt/C under 0.10 M KOH alkaline condition. These results demonstrate the co-doping of bimetal Fe/Co and heteroatom N, excellent electrical conductivity of rGO and large surface area of nanoporous structure enhance the electrocatalytic activity . The successful synthesis of such nanoporous rGO nanosheets provides a facile way to explore a series of 2D non-precious metal electrocatalysts for energy conversion and storage devices.
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2013
·Vol. 5
·期 6
·2454-2459
·
IF 6.233
Baoru Bian,Weixing Xia,Juan Du,Jian Zhang,J. Ping Liu,Zhaohui Guo,Aru Yan
By using Fe(CO)x-OAm (oleylamine, x < 5) as the Fe precursor to slow down the formation rate of FePt nanoparticles (NPs), a time dependence of the NPs' nucleation and growth process was observed by transmission electron microscopy (TEM). The complexing temperature of OAm and Fe(CO)5 at which Fe(CO)x-OAm was formed has a strong influence on the nucleation rate and growth process of the NPs. TEM analyses indicated that the NPs with isotropic shape were single crystalline throughout the synthesis and were formed by a diffusion-controlled Ostwald-ripening (OR) growth mechanism. The nanorod particles were first formed via joining of arbitrarily oriented single crystals and the two crystals formed a uniform particle afterwards, as described by the oriented-attachment (OA) mechanism. The ratio of OAm to Fe(CO)5 used in the preparation of Fe(CO)x-OAm has a significant influence on the growth process, and subsequently the shape, size and size distribution of the FePt NPs. By adjusting the ratio and its complexing temperature, single-crystal FePt NPs with controllable size and isotropic shape were obtained. The insight into the exploration of the specific roles of the reaction conditions and the formation mechanisms provided important information for controlling the morphology of the nanoparticles.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Ce Han,Xiangjie Bo,Jian Liu,Mian Li,Ming Zhou,Liping Guo
In this work, a novel catalyst in form of Fe, Co bimetallic alloy activated N-doped graphitic carbon layers (NC/Fe 10-x Co x ) without metal core is rationally fabricated through a simple pyrolysis method and applied for efficient oxygen reduction reaction (ORR) catalysis. The NC/Fe 10-x Co x catalysts have exhibited superior electrocatalytic ORR performance comparable to commercial Pt/C via a four-electron pathway under the same loading in alkaline media with outstanding durability and complete methanol tolerance. The improvement of ORR performance can be attributed to the synergistic effect of Fe, Co bimetallic activation on nitrogen-doped graphitic carbon layers, rich pore structure and uniformly dispersed dopants in the carbon matrix.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xiaolin Shi,Guo Yang,Bo Xing,Caiyi Jiang,Hangdao Qin,Min Li,Fuping Zhang,Yi Wang,Dongzheng Wang,Xingyong Liu
Fluorine-containing wastewater seriously threatens human health due to the wide application of sodium p -perfluorous nonenoxybenzenesulfonate (OBS). Herein, a novel Fe-Co bimetallic biochar (Fe-Co@BC) with abundant pore structure, functional groups and quickly electron transfer capability was prepared using hydrothermal method. Meanwhile, Fe-Co@BC-Ⅰ exhibited a superior catalytic capacity for degradation of OBS in PMS system, and the removal efficiency of OBS reached to 94.1 % within 60 min. After three cycles, the removal efficiency of OBS still up to 80 % and the Fe-Co had almost no leaching (Fe: 0.006 mg/L; Co: 0.023 mg/L). Further mechanistic insights were verified that high catalytic capacity and stability ascribed to the synergistic effects of Fe and Co, where Fe-Co mutual interaction promoted the formation of Fe 2+ and Co 2+ and accelerated electron transfer of catalyst. In addition, the quenching experiments and electron paramagnetic resonance (EPR) proved that the degradation of OBS can be mainly ascribed to indirect oxidation of SO 4 −• , O 2 −• and •OH, and the possible degradation pathway of OBS was proposed in the Fe-Co@BC/PMS system. This study provides an insight into bimetallic prepared and activation PMS degradation fluorinated wastewater.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 37
·16323-16330
·
IF 2.7
Xiaoyue Yue,Chaoyun Wu,Chenxu Hao,Yanhong Bai
The abuse of tetracycline (TC) has led to serious threats to human health and the environment. Therefore, the rapid and sensitive detection of tetracycline is of particular importance. Herein, we successfully synthesised a bimetallic nanozyme D-Fe/Co-MOF with oxidase activity and established a colourimetric sensor. The complex of Fe2+ in D-Fe/Co-MOF and TC can release hydroxyl radicals (˙OH) and promote the oxidation of TMB. As a result, the colour of the detection system significantly changes, enabling the sensitive colourimetric detection of TC. Compared with the existing Fe/Co-MOF sensor, D-Fe/Co-MOF can effectively reduce the detection error caused by hydrogen peroxide decomposition, improving the accuracy of TC detection. Under the optimal conditions, the absorbance at 652 nm showed a good linear relationship with TC concentration in the range of 0.35–220 μg mL−1. The detection limit was as low as 0.0719 μg mL−1, considerably lower than the national safety standard. The proposed colourimetric sensor was also successfully used for the detection of TC in actual milk samples, and the results were in good agreement with those obtained via liquid chromatography. The proposed strategy for the detection of TC in food is expected to contribute to ensuring food safety and human health.
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Lei Hu,Junkai Hao,Ruhui Shang,Huitian Zhi,Xujie Wang,Yingchao Yang,Hanning Song,Chenxi Li,Juan Yu,Zhengquan Yan
Background Environmental safety and protection is accordingly one of the hottest issues to be concerned nowadays. Among all the chemicals to be monitored urgently, aminophenol and luminol are both quite hazardous but widely utilized in the fields of chemical industry, medicine, scientific research, chemical sensing, and so on. Although some reported ways could detect them satisfactorily, few reports could be found for portable visual monitoring and degradation of aminophenol and luminol, using only one sensor to judge the degradation degree as well. Results Fe-doped-Ce oxide modified chitosan fiber (Fe–Ce ox@CF) was developed by microwave-assisted hydrothermal method. By virtue of the excellent physical and chemical performance of carboxylated chitosan and its synergistic effect, Fe–Ce ox@CF possessed prominent oxidase-mimic activity to catalyze over 94 % luminescent luminol into dicarboxylic acid at room temperature. When utilized to accelerate the oxidization of ABTS, K m / V max were 0.0403 mM/2.327 × 10 −8 M s −1 . Especially, ultra-trace m -aminophenol ( m -AP) could exclusively alter the color of Fe–Ce ox@CF-ABTS from green to purple-red with remarkable visibility. Under the optimized conditions, there exhibited an excellent ratiometric colorimetric linear relationship between lg( A 515 / A 730 )/lg( A 515 / A 415 ) and c m -AP , and a fluorescent one between ΔF 427 and c luminol with detection limits (LOD) of 2.0 × 10 −9 M and 5.6 × 10 −9 M respectively. Especially, the red-green-blue (RGB) values got by a common smartphone also possessed good linear relationships with LODs of 1.7 × 10 −8 M and 1.34 × 10 −8 M. Significance This work represents the first oxidase-mimic based sensing system for potable and quantitative degradation of luminol and visual detection of m -aminophenol as well with the help of smartphones. It will also shed promising light on modified natural carbohydrate polymer-based sensors by non-destructive self-assembly and further application in practices.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Shuai Li,Yimei Zhang
Enhancing the energy efficiency of hydrogen evolution reaction (HER) represents a significant yet challenging goal. One promising approach to achieve this is developing catalysts with high activity and robust stability to couple HER with Fenton reaction. Herein, mesoporous nanosheet arrays (MNA) with featuring a mean pore size of 25 nm, was fabricated via a hydroxide precursor annealing strategy. The produced Co-P MNA 25 and Fe-Co-P MNA 25 are applied in HER and Fenton reaction, respectively. Compared to the MNA 12 synthesized by traditional method of self-growth and solid-phase phosphorization, the MNA 25 exhibited remarkable enhancement in performance, including a 49 % reduction in HER overpotential at 10 mA cm −2 , a 41 % increase in pseudo-first-order degradation kinetics of methylene blue in Fenton reaction, along with superior stability. In addition, the MNA 25 based flow reactor, which couples the two reaction and features a fastener-free design, demands just a minimal voltage of 1.61 V to drive, demonstrating impressive energy efficiency (81.56 % for HER and 2.77 g kWh −1 for Fenton) and application potential. More importantly, numerical simulations reveals that the larger pore size in MNA not only facilitated faster electrolyte diffusion, but also enhanced its impact buffer performance, thereby improving its catalytic activity and stability. Our work unveils the mechanism of mesopore size on the electrochemical performance of catalysts at the theoretical level, which offers a promising avenue for enhancing the energy efficiency of HER.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2016
·
IF 2.196
Pan Liang,Jie Wang,Zhi-Hong Liu
A pure zinc borate, Zn[B 12 O 14 (OH) 10 ], has been synthesized and characterized by XRD, FT-IR, simultaneous TG-DTA techniques, and chemical analysis. The molar enthalpy of solution of Zn[B 12 O 14 (OH) 10 ] (s) in 1 mol·dm −3 HCl(aq) was measured by microcalorimeter at T = 298.15 K. The molar enthalpy of solution of ZnO(s) in the mixture solvent of 2.00 cm 3 of 1 mol·dm −3 HCl(aq) and calculated amount of H 3 BO 3 was also measured. With the incorporation of the previously determined enthalpy of solution of H 3 BO 3 (s) in 1 mol·dm −3 HCl(aq), together with the use of the standard molar enthalpies of formation for ZnO(s), H 3 BO 3 (s), and H 2 O(l), the standard molar enthalpy of formation of −(9646.6 ± 9.6) kJ·mol −1 at T = 298.15 K was obtained on the basis of an appropriate thermochemical cycle. In addition, the molar enthalpy of formation of −9492.7 kJ·mol −1 for [B 12 O 14 (OH) 10 ] 2− has also been estimated by a group contribution method, which has been used to predict the Δ f H m θ of a series of transition metal borates of M[B 12 O 14 (OH) 10 ] (M II = Mn, Zn, Fe, Co, Ni). These estimated data have been used to further compare the stability of this series of transition metal borates.
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2015
·Vol. 27
·期 2
·1966-1973
·
IF 1.569
Lu Changyu,Guan Weisheng,Hoang Tuan K. A.,Guo Jifeng,Gou Haigang,Yao Yiliang
In this work, Fe-series (Fe, Co, Ni) doped titanate nanotubes were synthesized via a simple, one pot hydrothermal process using commercial TiO 2 powder as the precursor. The samples were characterized by X-ray diffraction, nitrogen adsorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy, and UV–Vis. SEM and TEM results show that regularly uniform nanotubes were obtained and they possess homogeneous tubular structures with open ends. There is no significantly morphological and structural difference between TiNTs and Fe-series doped TiNTs. Furthermore, the photocatalytic properties of TiNTs and Fe-series doped TiNTs were studied using the degradation of ciprofloxacin. Fe-series doped TiNTs exhibit higher catalytic activities than those of TiNTs and commercial TiO 2 .
✓ 已验证
DOI
高影响因子
Materials Chemistry Frontiers
·
2017
·Vol. 1
·期 10
·2065-2077
·
IF 0
Fu Yang,Bangbang Wang,Hang Su,Shijian Zhou,Yan Kong
Surface defective or heterojunction sites of catalysts generally afford remarkable catalytic activity thanks to their high-surface-energy. Regularly-generating multiple defective sites on the surface of a catalyst is exceedingly promising in many reactions. In this study, we report an unexpected Co/Fe–Co planar hybrid composite nanosheet with serried surface defects including surface biphasic junction sites or defective holes. A facile thermal-induced process was applied to trigger the generation of defective sites on planar Co/Fe–Co hydroxides. Through a controlled thermal process, massive serried CoO nanocrystals were in situ dissolved out of the surface of cobalt hydroxide, while defective surface holes were formed on the Fe-doped Co(OH)2 nanosheets under a prolonged thermal procedure. The morphology and microscale structure of the resulting Co/Fe–Co hybrid 2-dimensional (2D) composites were systematically examined by virtue of various characterization techniques. As expected, the obtained surface defective Co/Fe–Co planar composites showed obviously enhanced catalytic activity in the Fenton-like reaction. Based on a catalytic study, we proved that the CoO nanocrystals densely-distributed on thinlayer Co(OH)2. Uniformly-introduced Fe heteroatoms in the inter-structure of Co(OH)2, along with the formed surface defective holes on Fe–Co hybrid composites, are synergistically responsible for increased catalytic removal efficiency of MB in the presence of peroxomonosulfate.
✓ 已验证
DOI
ACS Applied Nano Materials
·
2026
·
IF 5.8
Yue Qian,Xiaopeng Luo,Ying Mao,Haiyang Gu,Lan Zhang,Xiaomin Zhang,Xuejing Shen,Rui Zhu,Zhanjun Wu
Transition metal-modified carbon composites have emerged as promising candidates for electromagnetic wave (EMW) absorption due to their tunable microstructure and tailorable electromagnetic properties. However, the influence of metal species configuration on dielectric loss at the atomic scale remains less understood. In this work, we fabricated three types of M-NC absorbers (M = Fe, Co, and Ni; NC = N-doped carbon) using a unified method that includes templating, pyrolysis, and acid etching. This approach produced samples with similar porous structures, which helped minimize structural differences and isolate the effect of the metal species. Among them, Ni-NC achieved a minimum reflection loss of −39.7 dB at 13.3 GHz with a matching thickness of only 2.0 mm, much better than Fe-NC (−22.5 dB) and Co-NC (−27.3 dB). This superior performance is attributed to the specific metal-N bonding structure, which governs both the interfacial polarization and the electronic structure. Meanwhile, the 3D carbon porous framework promotes impedance matching and extends the EMW propagation path through multiple scattering, collectively enabling superior absorption performance. Radar cross section simulation results confirm the effective EMW attenuation of these composites, particularly Ni-NC, highlighting their potential suitability for stealth applications. This work provides fundamental insights for the rational design of high-performance, lightweight EMW absorbers through precise chemical structure engineering.
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 6
·124918
·
IF 7.5
Zhouxiao Zhai,Jingce Bi,Linshan Wang,Ningning Liu,Yi Wang,Xia Zhang,Zhuopeng Wang,Yide Han
It remains challenging to fabricate bimetallic MOF-derived catalysts with efficient redox cycling to active peroxydisulfate (PDS) in advanced oxidation processes for antibiotic removal. Herein, a surface-static synthesis strategy was employed to prepare a bimetallic core–shell catalyst (M@Z(Co 3 Zn 1 )). This strategy retained its original morphology and established synergistic Fe 2 + /Fe 3+ and Co 2+ /Co 3+ redox cycles to facilitate PDS activation. As a result, the M@Z(Co 3 Zn 1 )/PDS system achieved 97.6% tetracycline (TC) removal within 60 min, with a corresponding k obs value of 0.05742 min −1 , which is significantly higher than those of Z(Co 3 Zn 1 ) (77.1% and 0.01922 min −1 ), M(Fe) (62.0% and 0.01184 min −1 ) and catalysts reported in previous studies. The system maintained excellent stability over five consecutive cycles with low metal leaching. Furthermore, an extreme gradient boosting (XGBoost) model was developed to accurately predict catalytic performance under different operating conditions, demonstrating the potential of machine learning for catalyst-system optimization in wastewater treatment. This work provides a new strategy for the structural regulation of bimetallic MOF-derived catalysts and highlights the integration of machine learning with catalytic process design for antibiotic-contaminated water remediation.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）