Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Jiming Wang,Min Ji,Jiaqi Lv,Min Wang
Photo-thermo-chemical dry reforming of methane (PTC-DRM) produces syngas has been a promising strategy to utilize abundant solar energy and alleviate greenhouse effect. Herein, we report an efficient PTC-DRM process on Ni-based catalyst with Zn doping and investigate the effect of Zn on the catalytic performance of catalysts. Zn promoted the generation of active sites on the surface of Ni-Al 2 O 3 , suppressed the accumulation of coke during the reaction process and enhanced the photocatalytic activity of the catalyst. Ni-ZnO-Al 2 O 3 catalyst exhibited highest thermal catalytic performance and the conversion of CH 4 and CO 2 are 50.2% and 58.1% at 650 ℃, respectively. All catalysts exhibited higher reaction rates of CH 4 and CO 2 and higher hydrogen selectivity under light conditions. Light also significantly enhanced the carbon deposition resistance and stability of the catalyst. And possible reaction mechanism of the Ni-ZnO-Al 2 O 3 was proposed during PTC-DRM process.
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高影响因子
RENEWABLE ENERGY
·
2024
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IF 9
Daxin Jiang,Min Lin,Yuhao Yan,Lulu Zhan,Rui Li,Yulong Wu
Catalytic hydrodeoxygenation (HDO) is an effective way to produce high–value products from lignin-derived phenolic compounds. In this work, three different morphologies of Ni/CeO 2 catalysts (amorphous, cubic, and rod-shaped) have been prepared through the conventional wet impregnation method. They can be used for the HDO of guaiacol to prepare cyclohexanol, an important chemical raw material. The influence of different morphologies of CeO 2 on catalytic activity was explored. The research results indicate that Ni/CeO 2 –r catalysts with rod-shaped structures exhibit excellent catalytic properties. As a result, a 100 % conversion rate and 96.9 % cyclohexanol yield were achieved on the Ni/CeO 2 –r catalyst at 240 °C. The catalytic performance of the three catalysts follows this order: Ni/CeO 2 –r (rod-shaped) > Ni/CeO 2 –c (cubic) > Ni/CeO 2 –p (amorphous). The results of Raman and XPS indicate significant differences in the surface oxygen vacancy in catalysts with different morphologies. The Ni/CeO 2 –r catalyst has the highest oxygen vacancy concentration and defect. In addition, Ni/CeO 2 –r also has the largest specific surface area (S BET ) and the highest nickel dispersion, and forms more Ni 0 because of the strong interaction of Ni species and CeO 2 support. Therefore, Ni/CeO 2 –r exhibits the most excellent catalytic performance for the hydrogenation of guaiacol than the other two catalysts. Moreover, the cycling activity test was also investigated over the Ni/CeO 2 –r catalyst. After five cycles, the conversion rate of guaiacol and the yield of cyclohexanol hardly decrease. This work provides vital ideas for the development of higher-activity, higher-stability, and low-cost catalysts for the conversion of lignin-derived phenolic compounds in the future.
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高影响因子
ADVANCED ENGINEERING MATERIALS
·
2024
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IF 3.4
Fei Chen,Chengbao Liu,Leizhi Zheng,Feng Chen,Junchao Qian,Yongbin Qiu,Xianron Meng,Zhigang Chen
Nickel hydroxide (Ni(OH) 2 ) is recognized as a promising material for electrodes in supercapacitors owing to its exceptional theoretical specific capacitance. However, Ni(OH) 2 has several drawbacks, including a short cycle life, susceptibility to volume expansion, and poor electrical conductivity. In this work, Ni(OH) 2 nanosheets anchored on layered g-C 3 N 4 /C (Ni(OH) 2 –g–C 3 N 4 /C) are designed by biological template induction and a hydrothermal method. Ni(OH) 2 –g–C 3 N 4 /C has unique petal-like structures, which can provide a vertical charge transport channel to increase reaction potential of the material during the charge–discharge process. The introduction of biomass carbon can solve the problem of the bulk phase accumulation of g-C 3 N 4 and can also improve the overall conductivity of the composite. Compared to Ni(OH) 2 (522 F g −1 ), g-C 3 N 4 /C (76.2 F g −1 ), and g-C 3 N 4 (16 F g −1 ), the Ni(OH) 2 –g–C 3 N 4 /C-0.75 (NGC-0.75) composite exhibits the highest specific capacitance of 1034 F g −1 at 1 A g −1 . Furthermore, after 5000 cycles at 5 A g −1 , the capacitance of the material is maintained at 85.97%. Meanwhile, the asymmetric supercapacitor based on the NGC-0.75 shows a high energy density of 18.29 Wh kg −1 at the power density of 400.02 W kg −1 with excellent cyclic stability of 127.45% over 10 000 cycles.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Yufeng Fu,Ao Xie,Yujing Guo,Peng Song,Jinyuan Miao,Linting Cheng,Chenxi Zhu,Weijian Han,Zhiqun Bai,Yongmei Chen,Pingyu Wan,Yang Tang
Water electrolysis powered by renewable energy is widely regarded as one of the most important methods for large-scale green hydrogen production. In this work, we have prepared a high-valence gallium-doped nickel-molybdenum nitride nanocomposite (Ga-Ni/Mo 3 N 2 @C) with abundant heterojunctions by a co-precipitation step and a subsequent high-temperature treatment step. The produced Ga-Ni/Mo 3 N 2 @C material benefits from a dual modification strategy (DMS) including the Ga doping-induced internal electronic construction and the carbon shell encapsulation-derived external corrosion inhibition. This DMS not only facilitates the modulation of the intrinsic activity of Ni and Mo constituents, but also strengthens the durability of the Ni/Mo 3 N 2 active components. In hydrogen evolution reaction (HER) test, Ga-Ni/Mo 3 N 2 @C exhibits ultra-low overpotentials of 9 mV at 10 mA cm −2 and 116 mV at 100 mA cm −2 , small Tafel slope of 41.2 mV dec −1 , high conductivity of 114.8 μS cm −1 and low charge transfer resistance of 0.729 Ω cm 2 . Moreover, the Ga-Ni/Mo 3 N 2 @C electrocatalyst exhibits an ultralow Arrhenius activation energy of 14.69 kJ mol −1 , lower than those of Ni/Mo 3 N 2 (20.78 kJ mol −1 ), commercial Raney Ni (41.40 kJ mol −1 ) and Pt/C catalyst (15.24 kJ mol −1 ). The Ga-Ni/Mo 3 N 2 @C-assembled electrolyzer exhibits a lower cell voltage of 1.80 V than the counterpart cells with commercial Raney Ni (2.05 V) cathode or Ni/Mo 3 N 2 (1.85 V) cathode at 3000 A m −2 and room temperature, showing negligible deterioration in performance. The utilization of high-valence Ga atoms doping and carbon shell protection effect not only modulates material electronic structure to accelerate reaction kinetics, but also inhibits the dissolution of active sites. It is believed that this study offers a novel strategy for the development of high-performance electrocatalysts in water electrolysis.
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高影响因子
Materials Today Communications
·
2025
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IF 4.5
Dong Kong,Lu Mei,Guoyun Tang,Bingsheng Xu,Zhuo Chen,Zhangfu Yuan
Super-hydrophobic nickel-cobalt (Ni-Co) alloy coating was fabricated on Q235 steel by single-step electrodeposition, without any post-treatment with low-surface-energy agents. The influence of NH 4 Cl concentration on surface morphology, chemical composition, thickness, crystal structure, wettability, and corrosion performance was systematically investigated. Characterization techniques included scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), and a contact-angle goniometer, while corrosion behavior was evaluated by Tafel polarization and electrochemical impedance spectroscopy (EIS). The results showed that the addition of crystal modifier NH 4 Cl did not affect the thickness and phase structure of Ni-Co coating but affected the composition and micro-morphology of the coating. With the increase of NH 4 Cl concentration, the cobalt content of the coatings gradually decreased, the nickel content gradually increased, and the micromorphology of the coatings changed from a prismatic cone-like structure to a sea urchin-like micro-nano structure. The contact angle of the Ni-Co coating prepared by 150 g/L NH 4 Cl was 152.56°, showing stable super-hydrophobicity, the self-corrosion current density ( I corr ) of the coating was the smallest, and the polarization resistance ( R p ) was the largest, which had the best corrosion resistance. After 12 h immersion in 3.5 wt% NaCl the coating retained its morphology and a contact angle above 150°, with only minor localized corrosion products, confirming durable super-hydrophobicity and superior anticorrosion performance.
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高影响因子
ACS Sustainable Chemistry & Engineering
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2025
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IF 7.3
Mingqiang Chen,Zhiwei Yang,Haosheng Xin,Yishuang Wang,Defang Liang,Chang Li
As a major constituent of renewable biomass, conversion of cellulose to high-value chemicals presents a promising strategy. Herein, we designed a multifunctional Ni@C/WOx catalyst for direct cellulose conversion to ethylene glycol. This catalyst exhibited excellent stability while achieving a high ethylene glycol yield (69.4%). Graphene-encapsulated metal Ni stabilized hydrogenation activity and minimized metal leaching. The interaction between Ni@C and WOx facilitated the reduction of WOx and increased the formation of W5+ species. Characterization by electron paramagnetic resonance (EPR), X-ray photoelectron spectroscopy (XPS), NH3-TPD, and Py-IR confirmed that W5+ formation induces oxygen vacancies and acid sites on the catalyst support surface. At 30% Ni loading, strong metal–support interactions maximized the W5+ concentration and oxygen vacancy, enhancing the C–C bond cleavage efficiency. Consequently, the synergistic effect between Ni@C and WOx effectively facilitates key steps in cellulose conversion to ethylene glycol: cellulose hydrolysis, glucose retro-aldol condensation, and glycolaldehyde hydrogenation. The understanding of these structure–performance relationships has provided new ideas for the green and sustainable production of high-value-added chemicals from cellulose.
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高影响因子
Journal of Environmental Chemical Engineering
·
2025
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IF 7.2
Chen Feng,Haoxi Jiang,Lingtao Wang,Guochao Yang
CO 2 methanation is a critical process for converting CO 2 greenhouse gas into clean methane fuel, which holds significant strategic importance for environmental sustainability and energy sectors. Thermodynamic limitations demand low-temperature catalysts with enhanced low-temperature activity. This study employs solvent evaporation-induced self-assembly (EISA) to in-situ encapsulate Ni and Ce within SBA-15 molecular sieves. The approach significantly enhances low-temperature reactivity, achieving 67.5% CO 2 conversion and nearly 100% CH 4 selectivity at 300 °C, outperforming among Ni-based catalysts with silica carriers. Textural and electronic characterizations reveal that confinement effects of SBA-15 and electronic promotion of Ce synergistically strengthen the low temperature activity in methanation. This results in smaller Ni nanoparticles and an electron-rich Ni state, optimizing catalytic performance. Mechanistic analysis suggests that the Ce-modified Ni catalyst favors the formate pathway over the CO pathway, which supports the high methane selectivity and low carbon monoxide selectivity observed in this study.
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高影响因子
Surfaces and Interfaces
·
2025
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IF 6.3
Changlong Jiang,Yitong Yue,Yiming Wang,Bing Zhou,Gaojie Han,Ming Huang,Yuezhan Feng,Chuntai Liu
Low-reflection electromagnetic interference (EMI) shielding materials have attracted increasing attention due to their capability to prevent secondary electromagnetic pollution, yet simultaneously achieving high EMI shielding effectiveness (SE) and low reflection remains a major challenge. In this study, heterostructure MXene@Ni hybrids were first synthesized, followed by the fabrication of a multilayered MXene@Ni/ANF film with an electro-magnetic dual-gradient structure via a layer-by-layer vacuum-assisted filtration process. The electro-magnetic dual-gradient structure was achieved by precisely controlling the MXene-to-Ni loading ratio and implementing a specific filtration sequence. The engineered gradient layered structure regulate the electromagnetic properties by modulating the mass ratio of MXene to Ni in each MXene@Ni/ANF layers. As a result, the composite film with precise control of the electro-magnetic gradient transition layers and reflection layer achieved excellent impedance matching and electromagnetic wave dissipation, ultimately resulting in remarkably efficient EMI shielding performance (37.6 dB) with low reflection characteristic (a low reflection coefficient of 0.72). This optimized structure ensures efficient electromagnetic wave absorption with minimal reflection, making it highly suitable for advanced EMI shielding applications.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Xinbo Zhao,Huali Li,Weige Chen,Weijie Li,Zhiyu Han,Weihua Li
Conventional electromagnetic wave (EMW) absorbing materials often suffer from poor stability in humid and corrosive environments, limiting their real-world applications. In this work, carbon-based composites derived from Ti-Ni bimetallic metal-organic frameworks (MOFs) were synthesized via pyrolysis and investigated as dual-function materials for EMW absorption and corrosion protection. The composites exhibit excellent impedance matching and strong attenuation capability due to the synergistic interaction between the metal oxides and the carbon matrix. A minimum reflection loss of −40 dB and an effective absorption bandwidth of 4.61 GHz were achieved at an optimized thickness of 4.1 mm. Furthermore, upon incorporation into an epoxy resin coating, the composite displayed outstanding corrosion resistance. After immersion in a 3.5 wt% NaCl solution for 7 days, good stability was still maintained. This study presents a promising strategy for designing multifunctional materials with integrated EMW absorption and corrosion resistance, offering broad application potential in marine, aerospace, and communication sectors.
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高影响因子
Materials Today Energy
·
2025
·
IF 8.6
Kangwen He,Chi Chen,Shuangjia Weng,Xing Xu,Zhoule Gu,Hongqiao Li,Yang Xia,Yinfeng Wang,Hailing Peng,Xiaoxiao Lu
Ultra-high Ni quaternary cathodes (LiNi x Co y Mn z Al 1-x-y-z O 2 , 1 x 0.8) demonstrate superior cycling stability, positioning them as promising Ni-rich cathode candidates for next-generation lithium-ion batteries. However, increasing demand for higher energy density necessitates higher operation potential, which in turn exacerbates intrinsic challenges, such as poor chemical stability and diminished thermal stability. To address these challenges, an yttrium (Y) modification strategy has been carried out to enhance structural and interfacial stability. Compared to pristine, Y-modified samples show enhanced high-potential and high-temperature performances. In detail, it reveals a specific capacity of 228.5 mAh g −1 within an extended potential window of 3.0–4.5 V and retains 90.7% of its capacity after 200 cycles. When operated at an elevated temperature of 55 °C, it also presents a good capacity retention of 80.4%. The role of Y dopant has been systematically investigated using advanced techniques such as density functional theory (DFT) and in-situ experiments. Results indicate that Y primarily substitutes Ni sites, thereby stabilizing the oxygen framework to enhance cycling stability at a higher operation potential or elevated temperature. Moreover, the formation of surface-coated solid electrolyte layers effectively suppresses interfacial side reactions, contributing to improved cyclability under high-potential and high-temperature conditions.
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高影响因子
JOURNAL OF POWER SOURCES
·
2025
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IF 7.9
Wenwu Zhao,Xionghuan Yang,Ying Gu,Siqing Li,Yanqiang Hu,Yanfeng Tang,Minmin Wang
The development of highly efficient and stable electrocatalysts is crucial for the practical application of water splitting in renewable energy production. The Ni-Fe Phosphate electrocatalyst was synthesized through a simple and scalable electrodeposition method. This study presents a comprehensive investigation into the surface reconstruction engineering of an amorphous Ni-Fe phosphate electrocatalyst for enhancing its performance in alkaline water splitting. The reconstructed electrocatalyst exhibits significantly improved activity in alkaline water splitting. As expected, a low cell voltage of 1.86V was used to drive water splitting at 300 mA cm −2 , while the electrodes maintained high stability during 180 h continuous full water splitting at 70 mA cm −2 . This work provides insights into the mechanisms underlying the enhanced performance of the reconstructed Ni-Fe Phosphate based electrocatalyst and offers a promising approach for the design of advanced electrocatalysts for water splitting.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Hanhao Liang,Jian Wu,Jianglin Wang,Zhanhong Yang
Zn-Ni batteries have garnered considerable attention due to their high specific energy, consistent discharge voltage, favorable performance at low temperatures, and environmentally benign nature. Nevertheless, anode interface issues such as dendrite growth, hydrogen evolution , and interfacial side reactions lead to poor cycling stability of Zn-Ni batteries, significantly limiting their further commercial applications. In this study, we propose a facile electrolyte engineering strategy to optimize the Zn anode interfacial environment and stabilize the Zn anode by introducing tannic acid (TA) into the KOH electrolyte. The incorporated TA complexing agent addition will be used to prevent the direct contact of H 2 O with the anode surface and promote the desolvation of Zn 2+ through complexation, thus suppressing the interfacial corrosion. Consequently, the Zn symmetric battery using TA electrolyte cycles stably for 178 h at 1 mA cm −2 . The Zn-Ni full batteries with TA electrolyte maintain 98.08 % capacity retention after 2000 cycles at 20C. This study will be of immediate benefit in commercializing large-scale, practical energy storage applications.
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PubMed
高影响因子
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