CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Zixuan Xu,Yiming Wang,Rufeng Zhang,Anmin Liu,Yumin Zhang,Gaohong He,Yixiang Huang,Qiulin Li,Yuheng Wang,Min Li,Wenjun Zhang
In situ coordination assembly of Cu 2 O/Cu-TCPP(Fe) bimetallic nanozyme. • Intermetallic Cu + /Fe 3+ electron transfer accelerates the peroxidase-like activity. • ML-integrated dual-channel array distinguishes six antioxidants with 100% accuracy. • Precise quantification of antioxidant mixtures in biofluids via RF. Accurate identification and quantitative analysis of antioxidants in complex biological fluids are the keys to the early detection of severe diseases. The single-channel sensors suffer from weak specificity and critical multi-component signal crosstalk, which hardly meet the accurate analytical requirements. Herein, an intelligent colorimetric sensing platform of bimetallic mixed-valence nanozyme was integrated with machine learning (ML) to improve the analytical precision. Fe/Cu nanosheets of mixed valence were successfully acquired through Cu 2 O-coordinated anchoring in situ into iron porphyrin (TCPP(Fe)). This mixed-valence strategy effectively promoted the synergistic catalysis and valence cycling among the metal active sites, thereby significantly enhancing the peroxidase (POD)-like activity of the Cu 2 O/Cu-TCPP(Fe) ( V max as high as 8.107 × 10 −7 M·s −1 and K m as low as 0.913 mM). DFT calculations indicated that the introduction of Cu 2 O promoted strong Cu 3d and Fe 3d orbital hybridization and an upshift of the Cu d-band center, accelerating interfacial electron transfer and Fe/Cu valence cycling, thereby revealing the intrinsic mechanism underlying the enhanced catalytic activity. Taking the differential catalytic responses of the nanozyme with two different substrates, a highly sensitive dual-channel sensor array was designed with machine learning. Combined with algorithms of artificial neural network (ANN), random forest (RF), and support vector machine (SVM), etc., 100% accurate qualitative discrimination of six antioxidants was remarkably completed. Relying on the outstanding capability of the Random Forest (RF) algorithm to remarkable robustness in handling high-dimensional sample datasets, the sensor array successfully established a precise quantitative model for multiple antioxidants in complex samples, remarkably and intelligently sensing the diverse components in urine and serum. This work paved a new way for highly active bimetallic nanozymes to construct a trustworthy sensing platform as a diagnostic tool for the intelligent profiling of multi-component biomarkers in complex matrices. Download: Download high-res image (150KB) Download: Download full-size image
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高影响因子
Small
·
2026
·
IF 11.8
Junbin Li,Jiaqi Tang,Jingwen Ma,Zhijun Zhang,Xiang Li
To address the stability limitations of conventional Fe─N─C catalysts caused by H 2 O 2 byproducts and reactive oxygen species (ROS), an innovative dual-metal single-atom synergistic strategy is developed, resulting in the fabrication of a hierarchically porous hollow carbon fiber catalyst co-anchored with Fe and Ce dual-atom sites (FeCe DAC/HCNF). The catalyst features an interconnected network of hollow channels and carbon nanocages, forming a hierarchical micro/mesoporous structure (specific surface area: 935.24 m 2 g −1 ) that enhances mass transport efficiency and maximizes exposure of active sites. The dual-atom site is developed to achieve a “kill two birds with one stone” effect: Ce single-atom sites adjacent to Fe centers not only effectively scavenge ROS and decompose H 2 O 2 , but also modulate the Fe centers, thereby synergistically enhancing the intrinsic ORR activity while mitigating carbon matrix degradation. The FeCe DAC/HCNF catalyst exhibits exceptional electrochemical performance and stability in both alkaline and acidic media. When integrated into zinc-air batteries, it achieves superior device performance compared to Fe─N─C catalysts, with a remarkable cycling durability of 2300 cycles (∼1100 h of stable operation). This work breaks the traditional activity-stability trade-off of catalysts, providing a novel pathway for developing high-durability zinc-air batteries.
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高影响因子
Materials Today Physics
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2026
·
IF 9.3
Xuan Zhang,Xuguang An,Jing Zhang,Qian Liu,Lisi Xie,Zhao Li,Xiaolei Li,Weitang Yao,Qingquan Kong
Self-supported Fe–CoMoO 4 /NF nanosheets were fabricated. • The optimized catalyst delivers an ammonia yield of 44.6 ± 0.12 mg −1 cm −2 and high FE of 98.77 ± 0.23% at −0.8 vs. RHE. • The electrocatalytic mechanism was investigated. • Zn- NO 2 − battery with Fe-CoMoO 4 /NF as cathode were tested. The electrochemical reduction of nitrite to ammonia (NO 2 − RR) plays a pivotal role in closing the nitrogen cycle and mitigating nitrogenous pollution. Herein, we report a self-supported, Fe-doped CoMoO 4 nanosheet electrode grown on nickel foam (Fe-CoMoO 4 /NF), via a scalable hydrothermal-immersion strategy. Benefiting from Fe-induced electronic modulation and retention of the robust, hierarchical nanosheet architecture, the optimized Fe-CoMoO 4 /NF delivers an exceptional NH 3 yield of 44.6 ± 0.12 mg h −1 cm −2 with an ultrahigh Faradaic efficiency of 98.77 ± 0.23% at −0.8 V vs. RHE. In-situ differential electrochemical mass spectrometry (DEMS) coupled with density functional theory (DFT) calculation results reveal that NO 2 − reduction on Fe–CoMoO 4 /NF proceeds through nitric oxide-related intermediates, followed by sequential proton-coupled electron transfer steps toward NH 3 formation. When integrated into a Zn−NO 2 − battery, the catalyst enables a remarkable peak power density of 16.9 mW cm −2 , surpassing the performance of most previously reported electrocatalysts for NO 2 − RR. Fe-doped CoMoO 4 nanosheet self-supported on nickel foam enables highly efficient and selective electrocatalytic reduction of nitrite to ammonia, achieving an exceptional NH 3 yield of 44.6 ± 0.12 mg h −1 cm −2 and an ultrahigh Faradaic efficiency of 98.77 ± 0.23% at −0.8 V vs. RHE in neutral solution. Download: Download high-res image (436KB) Download: Download full-size image
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高影响因子
MATERIALS CHEMISTRY AND PHYSICS
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2026
·
IF 5.2
Feng Liu,Yanping Song,Pengzhan Yang,Lei Xiong,Xu Yang,Xiang Zhang,Shuai Han,Cui Liu,Nian Li
Rational design of high-performance, non-precious bifunctional electrocatalysts for overall water splitting is crucial yet challenging. Herein, a synergistic dual-optimization strategy is proposed, which simultaneously enhances the intrinsic activity at the material level and the mass/charge transfer at the electrode level. Specifically, Fe-doped CoS 2 nanoparticles are in-situ anchored onto a three-dimensional porous laser-induced graphene (LIG) framework, constructing an integrated, binder-free Fe-CoS 2 /LIG electrode. Experimental and spectroscopic characterizations reveal that Fe doping effectively modulates the electronic structure of CoS 2 , inducing lattice contraction and enriching high-valence Co 3+ species, thereby optimizing the adsorption energetics of reaction intermediates. Concurrently, the 3D interconnected LIG substrate serves as a highly conductive and hierarchical gas transport network, which not only prevents the restacking of catalysts but also ensures rapid electrolyte infiltration and efficient bubble detachment. Benefiting from this synergistic design, the Fe-CoS 2 /LIG electrode demonstrates superior electrocatalytic performance for both oxygen and hydrogen evolution reactions individually in 1 M KOH. Remarkably, it achieves low overpotentials of 300 mV for the oxygen evolution reaction and 86 mV for the hydrogen evolution reaction at 10 mA cm -2 , along with rapid reaction kinetics (Tafel slopes of 86 and 94 mV dec -1 , respectively) and robust long-term stability (≥36 h). This work underscores the effectiveness of coupled electronic and structural engineering for designing high-performance, non-precious electrocatalysts.
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2026
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IF 4.9
Hongbin He,Xi Zhu,Ziping Huo,Bolong Liang,Shu-Xuan Liang
AgI@MIL-101(Fe) photocatalyst was fabricated via in-situ precipitation method. • The photocatalyst achieved 95.25% degradation efficiency of OTC within 180 min. • The photocatalyst exhibited excellent practical applicability in real water samples. • Z-scheme heterojunction mechanism and degradation pathway were elucidated. Owing to their extensive and long-term application as well as poor degradability, antibiotics are inevitably persistent in aquatic environments due to their extensive and long-term use as well as heir difficulty in degradation. The development of efficient photocatalysts is therefore of crucial significance in environmental purification. In this study, a Z-scheme MIL-101(Fe) heterojunction photocatalyst was rationally designed and fabricated via a combined solvothermal and in-situ precipitation methods for the efficient removal of oxytetracycline hydrochloride (OTC), where MIL-101(Fe) is a typical member of the metal-organic framework (MOF) family. A series of characterization methods were employed to systematically observe the morphology and microstructure, optical properties, and photocatalytic performance of the as-prepared photocatalyst. The AgI@MIL-101(Fe) nanocomposites achieved an OTC degradation efficiency of 95.25% within 180 min under visible-light irradiation, demonstrating superior photocatalytic activity compared to a single-component counterparts. Structural characterizations results indicated that AgI formed a tight interface contact with MIL-101(Fe), which provided an effective structural foundation for theheterojunction construction. AgI particles were well dispersed on MIL-101(Fe), effectively mitigating their aggregation and thus creating abundant light absorption and reaction sites for photocatalytic reactions. Photoelectrochemical measurements further demonstrated that the nanocomposite possessed strong light absorption ability and high separation efficiency for photogenerated carriers. The as-prepared photocatalyst also exhibited excellent practical applicability in the treatment of actual water samples from Baiyangdian Lake. Five cycles of experiments indicated that its outstanding structural and catalytic stability. Mechanistic investigations identified superoxide radicals (•O 2 − ) as the primary active factors responsible for OTC degradation. Finally, the typical Z-scheme heterojunction mechanism and degradation pathway of OTC were finally proposed. This work provides a new design strategy and practical reference for the development of high-performance photocatalysts targeting the efficient removal of OTC and other antibiotics from aquatic environments. Download: Download high-res image (211KB) Download: Download full-size image
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Yujie Sun,Daijie Deng,Chaozhong Guo,Rong Hu,Yimin Chen,Huiyan Cao,Zhiyuan Cui,Rong Jin,Yao Liu,Yujun Si,Quan Xu
The development of highly active and durable oxygen reduction reaction (ORR) electrocatalysts is crucial for the advancement of zinc-air batteries. A dual-ligand stepwise preordination strategy is employed to synthesize the Fe–Ce bimetallic carbon-based catalyst (Ce/Fe–NC) with abundant Fe–N x /Ce–N x sites and Fe 3 O 4 , and a hierarchical micropore-mesopore structure. The introduction of Ce-related species significantly modulates the electronic structure of Fe sites, which is consistent with possible d–f orbital hybridization and d -band center regulation of Fe. Such electronic effect reduces the ORR energy barrier and endows Ce/Fe–NC with a half-wave potential of 0.875 V. The prepared CeO 2 with a fast Ce 3 + /Ce 4+ redox couple efficiently scavenges reactive oxygen species to inhibit the degradation of Fe–Nₓ sites and Fe 3 O 4 species, as well as the corrosion of carbon skeleton caused by Fenton reaction byproducts, ultimately enhancing the stability of the Ce/Fe–NC. After 30,000 accelerated cycles, the half-wave potential of the Ce/Fe–NC only decreases by 15 mV, and maintains a 95.4% current retention rate over 10,000 s. The zinc-air battery with Ce/Fe–NC achieves a peak power density of 230 mW cm −2 , a specific energy of 870.5 Wh kg –1 (Zn) , and a stable charge-discharge voltage gap over 100 h of cycling. This work provides a novel strategy for the preparation of high-performance non-precious metal ORR catalysts.
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高影响因子
MICROCHIMICA ACTA
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2026
·Vol. 193
·期 5
·347
·
IF 5.4
Li Xiaoming,Mao Qiu,He Lin,Zhang Zhengwei,Liu Dongmei,Liu Lu,Ju Pan,Ding Shijia,Li Siqiao,Luo Rong
Bimetallic Fe/Mo-doped carbon dots (Fe/Mo-CDs) have been developed as a high-performance nanozyme to construct a self-validating dual-mode (colorimetric/fluorometric) platform for hydroquinone (HQ) detection. The Fe/Mo-CDs exhibited strong peroxidase-like activity, catalyzing H 2 O 2 -mediated TMB oxidation to generate oxTMB, which simultaneously yields a colorimetric signal and quenches the fluorescence of Fe/Mo-CDs through a confirmed FRET process. The introduction of HQ competitively scavenges the essential reactive oxygen species, inhibiting oxTMB formation and triggering synchronous signal inversion in both channels. This endogenous self-validating function enables favorable analytical performance, with wide linear ranges and ultralow detection limits (0.03 µM for colorimetric; 0.016 µM for fluorometric). Successful application in commercial creams with satisfactory recoveries underscores its strong potential for accurate and reliable screening in complex samples. This work not only presents a sensitive sensor for HQ but also offers a novel design strategy for developing intelligent, self-validating biosensing systems.
Section
Graphical abstract
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PubMed
高影响因子
Journal of Energy Chemistry
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2026
·
IF 15.6
Yichi Guan,Lizhi Gao,Daoxiong Wu,Jie He,Hongxian Luo,Qiao Liu,Yu Zhou,Junming Luo,Ruisong Li,Zhenye Kang,Jing Li,Xinlong Tian,Shaoqing Chen,Zhengpei Miao
Iron-nitrogen-carbon (Fe-NC) materials have emerged as leading candidates among non-precious metal catalysts for the oxygen reduction reaction, offering a potential replacement for platinum-group metals in proton exchange membrane fuel cells (PEMFCs). However, the high intrinsic activity of current Fe-NC catalysts is often accompanied by rapid degradation, primarily due to the prevalence of M-N x active sites embedded within microporous carbon frameworks, which exhibit limited resistance to demetallation. Here, we report the development of mesoporous carbon-dominated Fe-NC (MC-Fe-NC) catalysts featuring atomically dispersed Fe-N 4 active sites (5.62×10 19 sites g −1 ), synthesized via a dual-coordination strategy combined with an assisted in-situ pore-forming approach. Mechanistic investigations reveal that the interconnected mesoporous architecture improves mass transport and water management at the electrode/membrane electrode assembly level, thereby mitigating carbon corrosion and structural degradation during durability testing. MC-Fe-NC demonstrates superior durability under stringent H 2 /air conditions, retaining 82% of initial current density at 0.6 V for 36 h, 92% of initial voltage at 0.2 A cm −2 for 100 h and enduring 30000 square-wave voltage cycles—surpassing the performance of most previously reported Fe-NC systems. Distribution of relaxation time analysis further supports that the mesoporous structure alleviates water flooding and carbon corrosion-related transport deterioration. Density functional theory calculations reveal that the N-enriched local coordination environment downshifts the d -band center, weakens OH-related perturbations, and reduces the driving force for metal dissolution, thereby enhancing the intrinsic anti-dissolution capability of the active sites. These results indicate that the improved durability originates from the synergistic effect of the interconnected mesoporous architecture and the N-enriched local coordination environment. This work offers a rational design pathway for stabilizing single-atom catalytic sites through the optimization of mesoporous structure and local coordination environment, advancing the practical deployment of non-precious metal catalysts in PEMFCs.
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高影响因子
Journal of Materials Chemistry A
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2026
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IF 9.2
Jianing Xu,Yangyang Wang,Qianqian Chen,H. Zheng
Single-atom catalysts (SACs) offer ideal active sites for advanced oxidation processes, yet their practical applications are hindered by synthetic complexity, isolated centers, and limited redox and charge-transfer dynamics. Here, we report a scalable synthesis of a Fe–Mn dual-atom catalyst (Fe–Mn/N–C) featuring a symmetric Fe–Mn–N6 coordination structure. This unique configuration establishes a sustainable bimetallic redox cycle that enables efficient activation of peracetic acid (PAA) for pollutant degradation. The catalyst achieves nearly complete removal of sulfamethoxazole (99.9%) with an apparent rate constant of 0.3226 min–1—7.7 and 8.5 times higher than those of Fe/N–C and Mn/N–C counterparts, respectively. Density functional theory calculations reveal that Mn–N coordination promotes electronic delocalization and fine-tunes the electronic structure of adjacent Fe centers, leading to distinct PAA adsorption geometries on Mn and Fe sites that favor the selective formation of hydroxyl radicals (•OH) and singlet oxygen (1O2) species. The optimized Mn d-band center further lowers the energy barrier for 1O2 generation. Moreover, the Fe3+/Fe2+ and Mn4+/Mn3+ redox cycles are coupled through electron transfer between Fe and Mn centers, ensuring self-regeneration of active sites and sustained catalytic stability. The Fe–Mn/N–C catalyst exhibits outstanding activity across a wide pH range, strong tolerance to competing inorganic ions, excellent recyclability, and broad substrate applicability. Collectively, this work establishes a durable bimetallic redox-coupling strategy that leverages electronic structure modulation to realize synergistic oxidation and provides insights for the rational design of robust Fenton-like catalysts for complex environments.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
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2026
·
IF 4.4
Guo Shiquan,Wang Le,Chen Fei,Liu Wei,Li Congju
Pt-based electrocatalysts are recognized as the most effective materials for the oxygen reduction reaction (ORR) in fuel cells. However, their widespread application is hindered by high cost, insufficient stability, and susceptibility to methanol and CO poisoning. Therefore, it is crucial to develop non-precious metal catalysts that are efficient, durable, and tolerant to fuel crossover. Herein, we report a facile synthesis of Fe–N–C catalysts derived from transition metal-doped zeolitic imidazolate frameworks via thermal treatment. In alkaline electrolyte, the obtained catalyst exhibited a half-wave potential of 0.79 V (vs. RHE) for the ORR, only 10 mV lower than that of commercial Pt/C. Moreover, it demonstrated excellent stability with 86.7% current retention after 35,000 s, along with outstanding methanol tolerance. In addition, no significant change in current response was observed upon the addition of 1 M methanol during linear sweep voltammetry. Notably, a direct methanol fuel cell incorporating the Fe–N–C catalyst delivered a peak power density of 13.3 mW cm −2 at 65 ℃. This work highlights the critical role of Fe single atoms in enhancing both ORR activity and methanol tolerance, underscoring the significance in advancing the development of high-performance electrocatalysts for fuel cell applications. Graphical abstract
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高影响因子
WATER ENVIRONMENT RESEARCH
·
2026
·Vol. 98
·期 2
·e70317
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IF 2.8
Wenxiao Zhang,Chenzhi He,Ji Tang,Wei Wang,Yanyan Guo,Youcai Zhao,Tao Zhou
Anaerobic digestate, a typical by-product of large-scale biogas plants, faces mounting disposal pressure due to the rapid increase in organic solid waste. In this study, an iron-carbon composite was produced from digestate through polyethylene glycol (PEG)-assisted iron modification followed by low-temperature carbonization. The resulting material exhibited a mesoporous texture, oxygen-containing surface functionalities, and Fe 3 O 4 /Fe 3 C domains, enabling efficient removal of Congo red in batch systems. Removal was favored under mildly acidic conditions. At pH 4 and 298 K, the maximum experimentally observed equilibrium uptake reached 1267.35 mg·g −1 at high initial concentration, and removal efficiencies approached 99% under the tested conditions. The adsorbent retained more than 95% of its initial removal performance after five regeneration cycles. Kinetic and equilibrium analyses, together with FTIR/XPS and post-adsorption characterization, support that uptake involves Fe-associated interactions, electrostatic effects, and hydrogen bonding, with additional high-coverage accumulation contributing at elevated concentrations. Overall, this work demonstrates a practical route to valorize anaerobic digestate into a reusable adsorbent for removing azo dyes from wastewater. Graphical Valorizing anaerobic digestate into a magnetically recoverable Fe-C adsorbent enables efficient Congo red removal: near-complete decolorization at pH 4, 298 K, maximum observed q e 1267.35 mg·g −1 , and > 95% performance after 5 cycles. A single-step, low-temperature process offers a scalable, low-cost wastewater solution.
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产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
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2026
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IF 5.8
Chenyang Sun,Yi Yu,Yuqian Lu,Fengchao Wang,Jifeng Liu,Wanying Zhai,Xia Gao
The integration of detection and degradation capabilities within a single material presents a promising strategy for the management of antibiotic pollutants. Herein, a multifunctional graphitic carbon nitride (g-C3N4)-coupled metal–organic framework (MOF) nanocomposite (denoted as g-C3N4/MIL101) was designed as an all-in-one platform for the sensitive detection and efficient removal of tetracycline antibiotics (TCs). The material architecture combines a Z-scheme heterojunction for enhanced photo-Fenton activity, with Fe3+ sites that serve as specific recognition centers for TCs. This dual design enables the nanocomposite to function as a highly selective colorimetric sensor array, achieving simultaneous discrimination of multiple TCs and non-TC antibiotics. Furthermore, the specific coordination between Fe sites and TCs not only facilitates sensing but also promotes the subsequent degradation by preconcentrating the targets near catalytic centers. Under visible light, the system demonstrates efficient TC degradation with minimized energy and H2O2 input, driven by the enhanced charge separation of the Z-scheme heterojunction and the Fe-mediated Fenton-like process. Theoretical calculations confirm the Fe-node-mediated specific coordination toward TCs, as well as the reduced activation energy for O2 and H2O2 activation of this platform. This work provides a feasible design strategy for multifunctional coordination polymers in advanced environmental applications.
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高影响因子
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