Journal of Energy Storage
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2026
·
IF 9.8
Guangsheng Dong,Zhida Yang,Binbin Gao,Zihao Zhu,Lu Tao,Wenjun Dong
The unique two-dimensional layered structure and notable theoretical specific capacity of molybdenum disulfide (MoS 2 ) make it highly competitive anode materials for sodium-ion batteries (SIBs). However, its practical utility is hampered by sluggish Na + /electron transport kinetics and substantial volume changes. Herein, the successful synthesis of an ultrafine MoS 2 /CuS heterostructure embedded in a P-doped carbon framework (MoS 2 /CuS@C) is achieved via sulfurization of an octahedral bimetallic Mo/Cu-metal-organic frameworks (MOFs) precursor. The rationale for achieving superior electrochemical performance hinges on an ingenious design: the leverage of p-n heterojunctions within the carbon framework. The p-n heterojunction of ultrafine MoS 2 /CuS can powerfully drive Na + /electron transfer, thus enhancing the reaction kinetics. Concurrently, the uniform confinement of this heterostructure within the MOFs-derived carbon framework not only supplies the mechanical robustness to withstand volume variation but also creates a highly conductive network to boost overall conductivity. Hence, the MoS 2 /CuS@C anode for SIBs exhibits exceptional cycling stability, demonstrating a capacity of 528 mAh g −1 through 3000 prolonged cycles at 10 A g −1 . Furthermore, the MoS 2 /CuS@C//Na 3 V 2 (PO 4 ) 3 full cell achieves a well-maintained capacity of 44.6 mAh g −1 over 500 cycles. This work establishes a design blueprint aimed at developing efficient anodes.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Jing Su,Tan Li,Xin Liu,Qihui Song,Jianmeng Cen,Zhongyang Luo,Kaige Wang
The valorization of plastic waste via electrocatalytic conversion into value-added chemicals and hydrogen represents a promising sustainable technology, yet is hindered by the lack of efficient and cost-effective bifunctional catalysts. Herein, we develop a hierarchically structured cobalt phosphide nanoflower catalyst anchored on nickel foam (CoP-F@NF) through fluoride-mediated morphology control. Comprehensive characterization confirms the successful synthesis of crystalline CoP nanoflowers with homogeneous elemental distribution. When applied to polyethylene terephthalate (PET) hydrolysate electro-oxidation, CoP-F@NF exhibits exceptional activity, high formic acid selectivity (>95 %) and Faradaic efficiency (>86 %), attributed to synergistic effects of the CoP phase and nanoflower architecture that optimize mass/charge transport (Tafel slope: 110.12 mV dec −1 ). Mechanistic studies reveal the dominant reaction pathway: ethylene glycol → glycolaldehyde → glyoxal → formic acid. Simultaneously, CoP-F@NF demonstrates efficient hydrogen evolution reaction (HER) activity (Tafel slope: 117.7 mV dec −1 ), leveraging PET oxidation to replace energy-intensive oxygen evolution. In an integrated two-electrode system, CoP-F@NF achieves concurrent formic acid production (FE: >92 %, selectivity: >92 % at 2.0 V) and H₂ generation with superior stability over five cycles. Control experiments with CoO-F@NF and density functional theory calculations reveal that P-modulation elevates the Co d-band center (εd = −1.295 eV vs. -1.601 eV for CoO), optimizing intermediate adsorption strength for both anodic oxidation (weakened *CHO-CHO binding) and cathodic HER. This work establishes a noble metal-free route for plastic waste upcycling and green hydrogen production via electronic and morphological catalyst design.
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Reaction Kinetics Mechanisms and Catalysis
·
2026
·
IF 2.1
Sun Min,Zhang Yihu,Li Bin,Wang Haiyan,Chen Peng,Li Zijiong
Nitrogen and phosphorus co-doped carbon dots (N/P-CD) were successfully synthesized via a facile and controllable electrochemical exfoliation strategy. In this approach, heteroatom doping is achieved through electrolyte engineering. Compared with conventional high-temperature or multistep synthetic methods, this strategy enables precise regulation of nitrogen and phosphorus incorporation simply by tuning the electrolyte composition, thereby providing an effective platform for the controllable modulation of the electronic structure of carbon dots. The electrocatalytic performance of N/P-CD toward the oxygen reduction reaction (ORR) was systematically evaluated in alkaline media. Benefiting from the synergistic effect between nitrogen and phosphorus dopants, the catalyst exhibits significantly enhanced intrinsic activity. Specifically, compared with undoped carbon dots, the onset potential and half-wave potential are positively shifted by 142 mV and 141 mV. Moreover, compared with the singly doped samples (N-CD and P-CD), N/P-CD exhibits a higher onset potential (0.86 V) and half-wave potential (0.76 V), demonstrating electrocatalytic activity comparable to that of the commercial Pt/C electrode. N/P-CD also demonstrated excellent electrochemical stability, as no significant shift in the CV curves was observed after 5,000 cycles, indicating the outstanding stability of the material. This study demonstrates that N/P-CD, as a low-cost and non-precious metal ORR electrocatalyst, shows promising potential in alkaline oxygen reduction systems and can serve as a scalable and environmentally friendly alternative to conventional Pt-based catalytic systems.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Liu Lunrong,Li Wenjing,Teng Mingyue,Yin Chengri,Yin Zhenxing
Direct urea fuel cells (DUFCs), as an emerging power generation technology, can efficiently convert the chemical energy stored in urea into electrical energy. The urea oxidation reaction (UOR) at the DUFC anode is the key reaction determining its power output. In particular, when wastewater containing urea is used as fuel, the slow kinetics of the UOR severely limit the power output. Here, a Ni 3 S 2 /CoSe 2 -NF p–n heterojunction with a nano-coral structure was fabricated by in situ growing n-type Ni 3 S 2 nanosheets onto p-type CoSe 2 nanoneedle arrays on nickel foam (NF). Mott–Schottky analysis, X-ray photoelectron spectroscopy, and ultraviolet photoelectron spectroscopy reveal that the p–n heterostructure facilitates charge transfer from Ni 3 S 2 nanosheets to CoSe 2 nanoneedles. Furthermore, density functional theory calculations indicate that the p–n heterostructure modulates the electronic states, significantly optimizes the d-band center, and promotes the adsorption of urea molecules on the catalyst surface. Compared to Ni 3 S 2 and CoSe 2 , the p–n heterojunction alters the rate-determining step (RDS) of UOR from the *CO(NH 2 )NH → *CO(NH)N pathway to the *CO(NH)N → *CONN pathway, significantly lowering the Gibbs free energy of the RDS and enhancing the UOR kinetics. Therefore, the Ni 3 S 2 /CoSe 2 -NF composite electrode achieves a current density of 100 mA cm –2 at only 1.33 V vs RHE, and at 1.35 V vs RHE with human urine as the electrolyte. Notably, the DUFC employing the Ni 3 S 2 /CoSe 2 -NF composite electrode delivers a maximum power density ( P max ) of 27.52 mW cm –2 , and retains a P max of 19.68 mW cm –2 even with human urine as the fuel.
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PubMed
高影响因子
POLYMER
·
2025
·
IF 4.5
Huiling Huang,Shengqi Cui,Xiaoqing Song,Zhonglin Luo,Biaobing Wang
It is still a great challenge to achieve flame retardant epoxy resin (EP) without sacrificing its transparency and mechanical properties. In the present work, A P/N/S containing sulfonamide compound (DPPBSA) was synthesized and adopted to improve the fire safety of transparent epoxy resin. With the incorporation of 5 wt% DPPBSA, the EP composite presented UL-94 V-0 rating and 35.4% of LOI value, its peak of heat release rate and total heat release were also reduced by 51.0% and 40.8% as compared with the pure EP, respectively. The improved flame retardancy was attributed to the comprehensive flame retardant effect of the P, N, and S elements. In the condensed phase, much continuous and denser char layers with greater graphitization degree were formed during the combustion. In the gas phase, the pyrolysis of the DPPBSA released dilution gases and P-containing free radical scavengers. Moreover, the EP composite containing 5 wt% DPPBSA displayed almost comparable tensile strength and transparency with the pure EP.
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Journal of Materials Chemistry A
·
2025
·Vol. 13
·期 47
·41354-41364
·
IF 9.5
Shaoyan Zhang,Bing Xie,Haishan Xu,Jinqiao Yi,Kun Guo,Haibo Zhang,Tianyu Li
Polymer film capacitors are vital for power electronic systems due to their ultrafast charge–discharge capability, high power density, mechanical flexibility, and lightweight nature. However, achieving both high discharge energy density (Ud) and high energy-storage efficiency (η) in polymer dielectrics remains a major challenge due to the intrinsic trade-off between permittivity, electric polarization, and breakdown strength. In this study, we have designed bilayer heterogeneous nanocomposites (BHNs) that integrate a linear polyimide (PI) layer—offering low dielectric loss and high breakdown strength—with a ferroelectric P(VDF-CTFE) matrix embedded with dopamine-modified BaTiO3 nanowires (dopa@BT NWs), which imparts high polarization. By precisely tuning the thickness of each layer and the interfacial charge accumulation, we activate synergistic interfacial polarization and a breakdown hindrance effect. More importantly, we propose the concept of a “threshold concentration of interfacial space charge”, which governs the critical charge density required to maximize performance without triggering dielectric instability. As a result, the optimized BHNs (0.3 vol% dopa@BT NWs/P(VDF-CTFE)-PI, whose thicknesses are 4 µm and 8 µm, respectively) exhibit a significantly enhanced Ud of up to 11.1–14.1 J cm−3 and a high η of 72–86%, substantially surpassing conventional single-layer configurations. This work not only delivers promising candidates for advanced dielectric energy-storage applications but also introduces a physically grounded design model that offers guidance for next-generation high-performance polymer-based capacitors.
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高影响因子
CERAMICS INTERNATIONAL
·
2019
·Vol. 45
·期 16
·19635-19643
·
IF 3.45
Zihao Song,Weigen Chen,He Zhang,Yanqiong Li,Wen Zeng,Sirui Tang,Chengzhi Zhu
Acetylene (C 2 H 2 ) gas concentration is a key parameter in transformer monitoring. In current work, the selective acetylene sensors which based on flower-like ZnO structures with NiO nanoparticles were successfully fabricated. The NiO–ZnO composites were synthesized by two-step hydrothermal method . And various of characterization analyses had been applied to the exploration of crystal structure and the p-n heterojunction . According to the systematic gas sensitivity tests, the response of NiO–ZnO (5%) to 50 ppm C 2 H 2 was 15.23 at 200 °C whereas the response of pure ZnO was 4.1 in the same condition. In addition, the response value of NiO–ZnO (5%) to 50 ppm C 2 H 2 was 3.6 times to 50 ppm H 2 . Such a good gas-sensing property of NiO–ZnO composites is due to p-n heterojunction and high catalytic activity of NiO.
研究领域:
材料科学
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传感器技术
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无机化学
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纳米材料
·
电力设备监测
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高影响因子
SOLID STATE IONICS
·
2018
·
IF 2.751
Juan Shi,Hougao Xiong,Yifu Yang,Huixia Shao
Developing solid electrolyte for alkali metal batteries is of important significance. A gel polymer electrolyte (GPE) based on the porous composite polymer membrane formed by blending of PEO , PMMA and P(VDF-HFP) is prepared, and the effects of the addition of nano-sized oxide fillers (Al 2 O 3 , TiO 2 , SiO 2 ) on the characteristics of the composite GPEs are investigated. The composite GPE with filling of SiO 2 has more amorphous region and porous structure which can hold more liquid electrolyte without leakage, so the composite GPE can provide high ionic conductivity at room temperature and large Li + or Na + transport number. Furthermore, the composite GPE possesses a large electrochemical window, superior thermal stability and excellent interfacial stability. The composite GPEs can be applied in a variety of lithium and sodium metal batteries and exhibit superior cycling stability and rate performance.
研究领域:
能源材料
·
电化学
·
高分子科学
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电池技术
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固态电解质
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Green Energy & Environment
·
2020
·Vol. 6
·期 6
·866-874
·
IF 6.395
Menglei Yuan,Yu Sun,Yong Yang,Jingxian Zhang,Sobia Dipazir,Tongkun Zhao,Shuwei Li,Yongbing Xie,He Zhao,Zhanjun Liu,Guangjin Zhang
Oxygen evolution reaction (OER) as the foremost stumbling block to generate cost-effective clean fuels has received extensive attention in recent years. But, it still maintains the challenge to manipulate the geometric and electronic structure during single reaction process under the same conditions. Herein, we report a simple self-template strategy to generate honeycomb-like Ni 2 P/N,P–C hybrids with preferred electronic architecture. Experiments coupled with theoretical results revealed that the synthesized catalyst has two characteristics: firstly, the unique honeycomb-like morphology not only enables the fully utilization of catalytic active sites but also optimizes the mass/electron transportation pathway, which favor the diffusion of electrolyte to accessible active sites. Secondly, N,P–C substrate, on the one hand, largely contributes the electronic distribution near Fermi level (E F ) thus boosting its electrical conductivity. On the other hand, the support effect result in the upshift of d-band center and electropositivity of Ni sites, which attenuates the energy barrier for the adsorption of OH − and the formation of ∗OOH. In consequence, the optimized Ni 2 P/N,P–C catalysts feature high electrocatalytic activity towards OER (a low overpotential of 252 mV to achieve 10 mA cm −2 ) and 10 h long-term stability, the outstanding performance is comparable to most of transition metal catalysts. This work gives a innovative tactics for contriving original OER electrocatalysts, inspirng deeper understanding of fabricating catalysts by combining theoretical simulation and experiment design.
研究领域:
材料科学
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电化学
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能量转换
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催化
·
纳米材料
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2023
·
IF 6.1
Jing Chen,Qifang Ren,Chunshan Xu,Bin Chen,Shaohua Chen,Yi Ding,Zhen Jin,Wanmi Guo,Xinyu Jia
In this study, Ag 2 O/BiVO 4 /diatomite composite with p-n heterojunction structure was synthesized by simple hydrothermal method with diatomite as carrier. It was found that under the action of hydrogen peroxide (H 2 O 2 ), the imidacloprid (IMD) could be effectively degraded by the composite. Systemic evaluations was conducted on effects of pH value, catalyst dosage, H 2 O 2 concentration, initial IMD concentration, and anion on how effeciently this new photocatalytic composite can degrade IMD. The results show that the p-n heterojunction formed between the two contact surfaces of Ag 2 O nanoparticle and BiVO 4 promotes the charge transfer between the interfaces, inhibits recombination of electrons and holes, and thus significantly improves the catalytic performance. The stability and reusability of Ag 2 O/BiVO 4 /diatomite composites were tested with ICP experiment and cyclic experiment. Active substance capture experiment and ESR reveal the photocatalytic reaction mechanism and confirm that superoxide radical ( O 2 − ), hydroxyl radical ( OH), and h + can promote the degradation of IMD. The degradation products and the intermediates of IMD were identified through LC-MS, on a basis of which the possible transformation pathway was proposed. In situ synthesis of p-type Ag 2 O and n-type BiVO 4 heterojunction composites has opened a new direction for photocatalytic degradation of organic pollutants.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 23
·e53937
·
IF 3
Mei Qiu,Xi Chen,Jun Wang,Jingsheng Wang,Kaiwen Chen,Shuang Yang,Siqi Huo,Hao Wang
Due to the plasticizing effect, the phosphorus-derived flame retardants often imparted flame retardancy to thermosetting resins at the expense of heat resistance. To address this issue, the phosphorous/nitrogen flame retardant (DOPO-TGIC) and 4,4′-diphenyl methane diisocyanate (MDI) were covalently introduced into the cross-linked network of vinyl ester resin (VER) by the reaction of the OH groups in DOPO-TGIC and VER and the NCO groups in MDI. Thus, an intrinsically flame-retardant VER was obtained. The as-prepared VER sample exhibited increased glass-transition temperature ( T g ) relative to virgin VER sample because DOPO-TGIC served as an additional cross-linking point during curing. Meanwhile, the P/N-containing VER sample featured superior flame-retardant properties, with a UL-94V-0 classification. Compared with VER sample, the peak heat release rate (PHRR) and total heat release (THR) of the P/N-containing VER sample were reduced by 55.6% and 44.0%, respectively. The improved flame retardancy was mainly due to the suppressed burning reaction in the gas phase and improved carbonization capacity in the condensed phase. Therefore, this work proposes a novel and effective strategy for addressing the trade-off between T g and flame retardancy of thermosetting resins.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Qingmiao Zhang,Tianhao Yao,Yanni Chen,Xunan Jing,Xiaoping Zhao,Daquan Wang,Hongkang Wang,Lingjie Meng
Transition metal oxides as potential anodes of lithium-ion batteries (LIBs) possess high theoretical capacity but suffer from large volume expansion and poor conductivity. To overcome these drawbacks, we designed and fabricated polyphosphazene-coated yolk-shelled CoMoO 4 nanospheres , in which polyphosphazene with abundant C/P/S/N species was readily converted into carbon shells and provided P/S/N dopants. This resulted in the formation of P/S/N co-doped carbon-coated yolk-shelled CoMoO 4 nanospheres (PSN-C@CoMoO 4 ). The PSN-C@CoMoO 4 electrode exhibits superior cycle stability of 439.2 mA h g −1 at 1000 mA g −1 after 500 cycles and rate capability of 470.1 mA h g −1 at 2000 mA g −1 . The electrochemical and structural analyses reveal that PSN-C@CoMoO 4 with yolk-shell structure, coated with carbon and doped with heteroatom not only greatly enhances the charge transfer rate and reaction kinetics, but also efficiently buffers the volume variation upon lithiation/delithiation cycling. Importantly, the use of polyphosphazene as coating/doping agent can be a general strategy for developing advanced electrode materials.
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高影响因子
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