JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Chenxi Wu,Huajun Lai,Feng Wang,Dianhui Wang,Weijiang Gan,Yulai She,Zhongmin Wang
V-based alloy membranes have huge potential for hydrogen separation and purification due to their higher hydrogen permeability , but suffer from hydrogen embrittlement . To address this matter, Pd and Fe have been chosen as alloying additions in V-based membranes to inhibit hydrogen embrittlement and maintain high hydrogen permeation performance based on the lattice-matching strategy. The phase structure, composition, microstructure and hydrogen permeation properties of V-Pd-Fe ternary alloy are investigated systematically, and the V-Fe and V-Pd binary alloys are presented for comparison. The results show that the prepared V-Pd-Fe ternary can match almost perfectly with pure V in lattice constants . Attributing to the lattice-matching strategy, the V-Pd-Fe ternary alloy exhibits more excellent hydrogen permeable properties than that of V-Fe and V-Pd binary alloys . The reduction of hydrogen embrittlement is ascribed to the lower hydrogen solubility that induced by the lattice distortion and electronegativity of Fe and Pd. Meanwhile, the manipulated lattice constant that parallel to pure V maintains high hydrogen permeation performance. Additionally, the designed ternary V 87.8 Pd 8 Fe 4.2 alloy exhibits exceptional long-term hydrogen permeation stability at 573 and 623 K, and hydrogen flux gradually decreases at 673 and 723 K is observed due to the interdiffusion between Pd film and V 87.8 Pd 8 Fe 4.2 substrate and defects in the Pd coating. This study offers new scenario and method for optimized hydrogen permeable properties and restrains hydrogen embrittlement in the alloy membrane.
研究领域:
材料科学
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氢能与储能
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金属膜分离技术
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固态氢传输
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合金设计
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物理冶金学
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DOI
高影响因子
IONICS
·
2021
·Vol. 27
·期 8
·3663-3669
·
IF 2.817
Xiang Tong,Chen Zhi,Rao Zhixin,Yan Mingge,Feng Zhijun,Li Xibao,Yang Huiyong,Huang Juntong,Shen Xing
Iron carbide (Fe 3 C) has gained significant attention for use in energy storage applications. Furthermore, using a nano-scale metal as the catalyst can reduce the formation of a solid electrolyte interface (SEI), thus enhancing capacity. For these reasons, hierarchical Fe/Fe 3 C/C nanofibers are prepared by electrospinning with subsequent thermal treatment and used as the anodes for lithium ion batteries (LIBs). These anodes demonstrate a good rate and high capacities. At 0.1 A g −1 , the Fe/Fe 3 C/C nanofiber electrode maintains 518 mA h g −1 after 100 cycles. When tested at 1 A g −1 , the discharge capacity gradually increases and reaches 663 mA h g −1 after 1200 cycles. This work demonstrates the possibility to design and develop transition metal carbides (TMCs) for use in energy storage.
研究领域:
材料科学
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储能技术
·
纳米技术
·
电化学
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DOI
高影响因子
ADVANCED MATERIALS
·
2026
·
IF 26.8
Zhechen Fan,Shuhu Yin,Wenhao Miao,Yudie Zhou,Weiyi Zhao,Yixuan Yin,Hao Yu,Lin Lin,Lina Hou,Hao Wan,Ying Wang,Junjie Ge
Atomically dispersed Fe–N–C catalysts are regarded as promising alternatives to platinum-group-metal (PGM) catalysts for proton exchange membrane fuel cells (PEMFCs). However, their further development is hindered by inadequate utilization of active sites in membrane electrode assembly (MEA). Herein, we developed a high mass activity O–FeNC catalyst with high site density and enhanced site utilization. C═O groups function as hard base linkers, promoting the densification of FeN 4 sites through Lewis acid-base interactions. Moreover, they also direct interfacial alignment within triple-phase boundaries, leading to concentrated hydronium ions and accelerated oxygen permeation via regulated ionomer nanophase segregation. As a result, the obtained O–FeNC cathode delivered a current density of 66.45 mA cm −2 at 0.90 V iR-free , surpassing the US Department of Energy 2025 target (44 mA cm −2 at 0.9 V iR-free ), with a mass activity that is 59% higher than commercial Pt/C. The peak power densities reached 1.8 W cm −2 under H 2 –O 2 and 0.93 W cm −2 under H 2 –air, alongside demonstrated industrial scalability through gram-scale synthesis and a 500 W PGM-free cathode stack prototype.
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高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 8.2
Yuan Ma,Yongli Li,Lan Jiang,Xin Kong,Xin You,Liang Liu,Rui Bao,Zhenhua Ge,Hao Cui,Feng Liu,Jianhong Yi
The energy-intensive Haber-Bosch process for ammonia synthesis necessitates sustainable alternatives, electrochemical nitrate reduction (eNO3RR) is emerging as a promising route to address nitrate pollution. However, it faces a critical bottleneck: the low ammonia selectivity arising from competitive hydrogen evolution. Herein, we introduce copper carbon dots-supported iron phthalocyanine (Cu-CDs/FePc) - a electrocatalyst featuring dynamic Cu–Fe dual sites that steer tandem e–/H+ delivery for efficient NH3 electrosynthesis. It achieves an outstanding ammonia yield of 17.69 mg h–1 mgcat.–1 with a remarkable Faradaic efficiency of 91.0% at −0.7 V vs RHE in acid conditions, which surpasses many reported transition metal-based electrocatalysts for eNO3RR. In-situ FTIR spectroscopy and density functional theory (DFT) calculations elucidate that dynamic Cu–Fe dual sites orchestrate directional electron–proton relay chains through electronic complementarity: Electron-deficient Cu2+ centers intensify NO3– adsorption/activation, while electron-enriched Fe2+ sites drive *NO2 protonation, and interfacial charge shuttling initiates valence oscillations (Cu+/Cu2+ and Fe2+/Fe3+) effectively lower rate-determining step energy barrier, thereby boosting ammonia selectively while simultaneously suppressing hydrogen evolution. Furthermore, the catalyst exhibits robust stability over 100 h and practical versatility in zinc-air battery systems. This work presents a rational design strategy for high-performance eNO3RR catalysts, offering a significant advance toward efficient green ammonia synthesis and environmental remediation.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·
IF 7.2
Cong Yuan,Xiaoxiao Zhu,Xuyang Xu,Fengyun Ding,Lei Zhou,Jean-Marc Chovelon,Wanglai Cen,Chengcheng Tian
Single-atom catalysts (SACs), known for their maximized atom utilization and unique electronic structures, were widely utilized in Fenton-like reactions for organic contaminant removal. Due to prolonged use or complex reaction environments, the active sites were prone to oxidation, agglomeration, or carrier degradation, leading to deactivation. Herein, a single-site Fe catalyst anchored on N-doped carbon nanotubes (Fe SA -N-CNT) was successfully synthesized by a dual anchoring strategy of EDTA and melamine. Fe SA -N-CNT catalyst exhibited an outstanding performance in peroxymonosulfate (PMS) activation, achieving more than 90% removal of sulfasalazine (SSZ) within 10 min. Combined experimental results and density functional theory (DFT) calculations revealed that the Fe-pyridine N 4 coordination sites and the adjacent carbon atoms (sub-C) served as dual active sites, facilitating a singlet oxygen ( 1 O 2 )-dominated oxidation of SSZ. Fe-N 4 sites could promote the formation of SO 5 •− , which subsequently generated 1 O 2 , while the sub-C sites contributed to the generation of superoxide anion radical (O 2 •− ), a precursor of 1 O 2 . The present study provided a novel strategy for synthesizing highly active SACs and deeper insights into the mechanisms of reactive oxygen species (ROS) generation within SACs/PMS systems for effective organic pollutant decontamination.
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RSC Advances
·
2026
·Vol. 16
·期 3
·2205
·
IF 4.6
Qilin Guo,Jianchun Ma,Wenbo Lu,Ying Wang,Ergui Luo,He Xiao,Li Zhang,Haishun Wu,Tianjun Hu,Jianfeng Jia
The development of high-performance anode materials remains a critical challenge in advancing microbial fuel cells (MFCs). In this work, we present a novel strategy employing ternary transition metal Co-Fe-Ni sulfides to overcome the inherent trade-off between catalytic activity and structural stability commonly observed in conventional polymetallic sulfides. Through a facile one-pot solvothermal approach, we synthesized low-crystallinity CoFeNiS x (Co-Fe-Ni) ternary sulfides with precisely tunable Co/Fe/Ni molar ratios. When integrated as an MFC anode, the optimized Co-Fe-Ni sulfide delivered a maximum power density of 3915 mW m −2 using Escherichia coli ( E. coli ) as the biocatalyst, representing an 8.4% enhancement over its binary CoFeS x (Co-Fe) analogue. This performance exceeds that of most previously reported carbon-based anodes. The synthesized transition metal sulfides combine ease of fabrication with outstanding electrocatalytic efficiency. Our findings highlight the underexplored potential of ternary transition metal sulfides in engineering next-generation bioelectrochemical interfaces. Doping Ni into Co-Fe anode forms novel intermetallic linkages, accelerating electrochemical kinetics and reducing charge transfer resistance for maximum MFCs power output.
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高影响因子
Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·291
·
IF 38.5
Shi Yuan,Zhang Ziyi,Bai Lei,Li Dingding,Shi Jingbo,Yue Zongye,Yuan Tianyu,Bai Jinbo,Bai Jintao,Leng Kunyue,Li Xiaolin,Wang Xuejing,Qu Yunteng
Metal–nitrogen–carbon catalysts have emerged as promising alternatives to costly platinum group catalysts in fuel cells and metal–air batteries; however, further enhancement of their activity in both alkaline and acidic media is still required. Here, we present a FeMg–N–C dual-atom catalyst that demonstrates excellent oxygen reduction reaction (ORR) performance, achieving notably high half-wave potentials (E 1/2 ) of 1.004 V in alkaline media and 0.881 V in acidic media. Additionally, the FeMg–N–C catalyst delivers peak power densities of 530.1 mW cm −2 in Zn–air cells and 1.06 W cm −2 in H 2 –O 2 fuel cells. Experimental and theoretical analyses reveal that the enhanced ORR activity arises from the spin state transition of Fe sites from low spin to medium spin, induced by adjacent Mg sites. This medium-spin Fe site exhibits strong adsorption of *O 2 and weak adsorption of *OH, effectively facilitating the initial ORR step and the removal of *OH. This work paves a novel pathway to design and construct well-performing electrocatalysts via the spin regulation strategy.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·
IF 7.5
Jin-Xing Zheng,Min-Hua Cui,Yan Zhang,Jing Wu,He Liu,Zhi-Yong Zheng
Nitrophenols are toxic and recalcitrant organic pollutants, posing a major challenge for wastewater treatment. Herein, a Fe-doped cyanobacterial biochar catalyst (Fe 3 /C 1 -800) was fabricated via a one-step impregnation pyrolysis strategy using lake-harvested cyanobacterial biomass as the carbon matrix and FeCl 3 ∙6H 2 O as both the in-situ activator and Fe source realizing the 'waste-to-treat-waste' concept. When applied to the catalytic reduction of 4-nitrophenol (4-NP), the Fe 3 /C 1 -800/NaBH 4 system achieved nearly complete reduction of 4-NP within 5 min, with a high turnover frequency (TOF) of 0.67 mmol·g -1 ·min -1 , surpassing most reported transition-metal catalysts and approaching noble-metal activity. The catalyst exhibited high efficiency over a wide pH range (3-11) and temperature range (15-45 ℃), resisted interference from Cl - and NO 3 - , and retain 93.7% of its activity after four consecutive cycles. In real water matrices (Lake Taihu water and secondary effluent from a sewage treatment plant), the 4-NP removal efficiency reached 95.4% and 88.1%, respectively. Mechanistic investigations revealed a synergistic effect between the catalyst’s large specific surface area (802.16 m 2 ·g -1 ) for 4-NP adsorption and the Fe 2+ /Fe 3+ redox cycle for accelerated electron transfer. This synergy promotes BH₄⁻ dissociation to generate active hydrogen species, enabling the selective reduction of 4-NP to 4-aminophenol (4-AP) with 97% selectivity. Furthermore, Fe 3 /C 1 -800 displayed broad-spectrum catalytic activity toward diverse nitrophenol contaminants (e.g., o -nitrophenol, p -nitrotoluene) with conversion rates >90%. This work not only offers a low-cost, eco-friendly pathway for cyanobacterial valorization but also offers a novel design principle of high-performance biochar-based catalysts, advancing the development of sustainable reduction systems for refractory organic wastewater.
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高影响因子
TALANTA
·
2026
·
IF 6.7
Xiao Ma,Junjie Wang,Xin Chen,Jingcheng Li,Jiaqi Xue,Yufan Hou,Shihao Zhao,Jingxiang Zhao,Xiaomi Meng,Huajun Chen,Fang Wang,Fangya Guo,Jian Sun,Dan Zhao
Oxidase-like nanozymes use dissolved O 2 as the terminal electron acceptor and do not require exogenous H 2 O 2 , offering methodological advantages; however, conventional “one-pot carbonization” often causes concurrent carbonization and active-site formation, making the coordination environment difficult to control. Here, a sequential “pre-coordinate-polymerize-pyrolyze” site-engineering route was developed. On carbon black, OPD-Fe 3+ pre-coordination and in situ oxidative polymerization were carried out, followed by thermal treatment and purification, by which Fe–N moieties were immobilized within the shell region of the material to afford highly dispersed Fe–N x moieties predominantly featuring Fe–N 4 -like coordination (Fe–N 4 @CB d ). Multiscale characterization (XRD/XPS/XANES/EXAFS) consistently showed that iron resided predominantly in a first coordination sphere dominated by Fe–N (coordination number CN ≈ 3.7; R ≈ 2.01 Å), with no resolvable Fe–Fe scattering and only minor, non-dominant Fe-containing phases. ROS-trapping and time-dependent EPR measurements further confirmed continuous O 2 activation with the generation of O 2 • - , •OH, and 1 O 2 in the Fe–N 4 @CB d /O 2 system. DFT calculations additionally supported Fe–N 4 -like Fe–N x sites as the most plausible dominant active structures for O 2 activation. Under a unified TMB/O 2 system, steady-state enzyme kinetics exhibited outstanding performance, with V max = 351 nmol L −1 s −1 and K m = 0.56 mM, which are competitive among reports using the same substrate/readout. An H 2 O 2 -free colorimetric platform for alkaline phosphatase (ALP) was constructed on this material, achieving a low limit of detection and good linearity; acceptable accuracy and precision were verified by standard additions in diluted serum. This sequential strategy predefines the Fe–N neighborhood and topology at the precursor stage, reduces uncertainty in site formation, and avoids metal-organic framework (MOF)/hard-template/ionic-liquid multi-step procedures, thereby providing a strong basis for reproducible Fe–N 4 -like/Fe–N x oxidase-like nanozyme preparation and streamlined, robust bioanalysis.
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高影响因子
Journal of Materials Chemistry A
·
2026
·
IF 9.2
Yangyang Zhao,Yijian Wang,Xiaoyu Wang,Xingchen Feng,Tao Cong,Juntao Feng,Pei Wang,Kai Yang,Xifeng Ding
Solid oxide electrolysis cells (SOECs) offer a promising route for electrochemical CO 2 conversation to sustainable fuels, but their widespread adoption is hindered by the lack of cathodes combining high catalytic activity and stability. To address this challenge, we developed an in-situ interface-engineered La 0.6 Sr 0.4 Fe 0.95 Ti 0.2 O 3-δ cathode (R-LSF 0.95 T) cathode featuring exsolves Fe nanoparticles. The optimized R-LSF 0.95 T-based cell delivers a current density of 780 mA cm -2 at 1.5 V and 800 °C in pure CO 2 atmosphere, representing a 23.2% improvement over mechanically mixed electrode. This performance enhancement arises from synergistic metal-oxide hetero-interfaces, where the reduced perovskite substrate promotes CO 2 adsorption and oxygen-ion transport, while the Fe nanoparticles provide abundant active sites and reduce activation barrier for CO 2 reduction. Notably, the Fe-decorated perovskite demonstrates superior carbon deposition compared to Ni-based cathodes owing to its moderate activity. Consequently, the electrolysis cell maintains exceptional stability over 100 h at 1.5V and 800 ℃, with interfacial robustness further enhanced through redox cycling due to reinforced anchoring effect with more minute Nano-Fe exsolution. This work establishes a novel materials design paradigm that reconciles the activity-stability trade-off in SOEC cathodes through the combination of moderately active catalysts with interface reinforcement, offering new pathways for developing durable, high-performance CO 2 electrolysis systems.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Jingbo Wang,Yingzhe Bao,Xiulan Ma,Shan Jiang,Ziyue Zhou,Bo Wang
Norfloxacin (NOR) is widely used in aquaculture; however, its overuse has been shown to cause water pollution. In this research, NOR was chosen as the target pollutant, and agricultural waste, specifically corn cobs, was used to prepare ferromagnetic iron-manganese composite modified biochar (FMBC) for adsorbing NOR from aquaculture wastewater. The adsorption mechanism was explored using various characterization techniques and evaluating the adsorption performance. The results indicate that the optimal modification conditions for FMBC include an iron source concentration of 0.3 M, the iron-manganese ratio is 3:1, with a calcination temperature of 350°C. At pH 6, FMBC achieved an adsorption capacity of 31.17 mg/g for NOR, which is approximately 85.5% and 49.14% higher than that of pristine biochar (BC) and iron-modified biochar (FBC), respectively. The adsorption process obeyed pseudo-second order kinetics and the Langmuir isotherm model. As the temperature increased, the adsorption capacity of FMBC for NOR decreased. The adsorption capacity of FMBC for NOR increased at low concentrations of Cu 2+ (maximum 25 mg/L), but at higher concentrations, it was inhibited. FMBC demonstrated the capacity to maintain NOR removal performance at a rate of greater than 50% following five cycles. The adsorption processes of FMBC for NOR are driven by several factors: pore filling, electrostatic adsorption, hydrogen bonding, surface complexation, π-π interactions, and hydrophobic bonding. In summary,this novel composite material offers promising prospects for mitigating water pollution in aquaculture, making it a cost-effective and sustainable alternative.
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DOI
高影响因子
PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS
·
2026
·
IF 1.3
Xin Tian,Kehan He,Wen-shi Jiang,Jun-jie Zhang,Cheng Wang,Yanhua Zhang,Yuan-hui Li,Yu-han Wang
A Fe-Mo/graphene oxide (GO) nanomaterial prepared by a simple reduction method was investigated in this study. This material demonstrated the ability to rapidly adsorb methylene blue (MB) from wastewater at different concentrations within 5 min, with a maximum adsorption capacity of 162 mg/g at 25 °C. Furthermore, as the temperature rises, the adsorption capacity of the Fe-Mo/GO material decreases slightly. The results of thermogravimetric analysis (TGA) also indicate that this material has good thermal stability at low temperatures. The detailed analysis using scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy (XPS) revealed that the well-dispersed molybdenum in the Fe-Mo/GO nanomaterial is essential for the adsorption of methylene blue (MB). The adsorption behavior and equilibrium adsorption isotherm of Fe-Mo/GO nanomaterials align with the pseudo-second-order kinetic model and the Langmuir model, respectively. Compared with the single-functional Fe/GO material, this bimetallic composite not only addresses GO recovery issues but also improves the low adsorption rate typical of single-iron materials.
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