JOURNAL OF CATALYSIS
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2024
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IF 6.5
Yixuan Wang,Hongyan Ban,Yugao Wang,Ruwei Yao,Shimin Zhao,Jiangliang Hu,Congming Li
Basic sites profoundly affect the mode and strength of CO 2 adsorption in the hydrogenation of CO 2 to formic acid (FA), however, the mechanism by which the quantities and strength of basic sites affect the reaction process is not yet clear. Herein, a Ni/Mg a AlO x catalyst has been developed and the basic sites of the catalyst can be modulated by simply altering the Mg/Al ratio. Through a series of characterizations and experiments, it was observed that weak and medium basic sites synergistically catalyzed the hydrogenation of CO 2 to formic acid, and a reasonable number of weak basic sites can improve reaction performance when a sufficient number of medium basic sites guarantee the fundamental catalytic activity. Moreover, the number and distribution of basic sites are also tightly related to metal-support interactions. This strategy provides theoretical guidance and a feasible scheme for optimizing the performance of non-precious metal heterogeneous catalysts.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Jiawei Li,Yunpeng Wang,Changzhou Chen,Xinyu Cao,Liancen Li,Yihao Xu,Ruyu Zhang,Jinli Chen,Minsheng Lu,Douyong Min,Guangfu Qian
To address the intrinsic activity and stability limitations of nickel-based heterojunction catalysts in the urea oxidation process (UOR) and the hydrogen evolution reaction (HER) under strongly alkaline conditions, a sulfur-doped lignin-derived carbon-encapsulated NiCo@MoO 2 heterostructure (NiCo@MoO 2 /SC) as a bifunctional catalyst is engineered. The physical properties, electrochemical characterization, and simulation results demonstrate that the built-in electric field at the triphasic interface synergistically optimizes the electronic structure of NiCo@MoO 2 /SC, enhancing the UOR process by rapidly generating the NiOOH active site. Meanwhile, charge redistribution in this heterostructure activates ortho‑carbon in the sulfur-doped carbon as HER active sites, significantly enhancing the HER process. Consequently, NiCo@MoO 2 /SC delivers exceptional catalytic activity in both UOR ( E 10/500/1000 = 1.26/1.38/1.40 V) and HER ( E −10/−500/−1000 = −27/−216/−288 mV). Besides, the carbon-encapsulated strategy improves corrosion resistance to enhance chemical stability, while the micro-nano array structure with the superhydrophilic/superaerophobic surfaces facilitates gas-liquid desorption to boost mechanical stability, enabling stable operation at ±1000 mA cm −2 for 100 h, even in a two-electrode system. This study proposes a viable approach to designing efficiency bifunctional electrocatalysts for urea electrolysis, while broadening the prospects of high-value utilization in biomass-derived carbon materials.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Zhong Wang,Xinjia Tan,Chuhan Wang,Guojian Li,Shuang Yuan
Ni/NiO is regarded as an ideal candidate material to replace noble metal catalysts due to its good corrosion resistance and excellent hydrogen evolution activity. However, the poor stability of Ni/NiO catalyst in the process of long-term water electrolysis limits its large-scale application. In this study, a facile hydrothermal method was used to successfully synthesize highly active and stable nanoparticulate Mo–Ni/NiO catalysts. Density functional theory (DFT) shows that Mo doping can optimize the charge transfer of Ni/NiO, reduce the d-band center and accelerate the H* dissociation from the catalyst surface. COMSOL numerical simulation further confirmed that the granular structure can enhance the ion concentration and promote H 2 generation. Electrochemical tests showed that the overpotential of Mo–Ni/NiO was only 45 mV when the current density was 10 mA cm −2 in 1 M KOH solution, which was much lower than 158 mV of Ni/NiO. Furthermore, Mo–Ni/NiO exhibited superior stability when operated at a current density of 10 mA cm −2 for 150 h with a reduction of overpotential of only 2 mV. This work provides a simple method for improving the HER activity of catalysts with Mo doping, which provides a new idea for designing catalysts with high activity, excellent stability and low cost.
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APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Zhaoxiang Qi,Yan Zhang,Junzi Huang,Wenjun Zhang,Ying Wang,Ying Qi,Shu Yin,Hongyu Mi,Yahong Xie
The integration of environmental remediation with green hydrogen production bifunctional water electrolysis in hypersaline industrial effluents requires catalysts that simultaneously address efficiency-stability trade-offs. This study presents a self-supported P-SnCoFe-LDH/NF architecture engineered through dual-ion co-doping, demonstrating unprecedented performance in chloride-rich alkaline oilfield wastewater. The optimised catalyst achieves overpotentials of 253 mV for oxygen evolution reaction (OER) and 187 mV for hydrogen evolution reaction (HER) at 10 mA cm −2 with 12-h stability, representing a 4 and 41 % performance retention improvement over conventional CoFe-LDH in aggressive media. Mechanistic studies reveal dual electronic modulation: Sn-doping induces d-band center downshifting while P-incorporation generates electron-deficient metal centers. This synergy establishes optimal adsorption–desorption equilibrium, evidenced by 21 % reduced OER charge transfer resistance and 56 % enhanced HER Volmer kinetics. The symmetric electrolyser (P-SnCoFe-LDH/NF||P-SnCoFe-LDH/NF) maintains <2 % voltage decay during continuous operation. This work presents a new paradigm for multifunctional electrocatalysis in complex aqueous matrices.
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ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Yuqiao Zhao,Geyuan Jiang,Suqing Zeng,Lisha Sun,Haipeng Yu,Dawei Zhao
Ultrathin devices represent a significant advancement in materials science and technology, playing a crucial role in wearable electronics, smart healthcare, and human-computer interaction. However, achieving mechanical durability, interface stability, and performance trade-offs remains challenging. Herein, the study reports a scalable layer-by-layer exfoliation strategy for the rapid and patterned fabrication of ultrathin cellulose ionogel devices, employing a solvent-induced assembly of cellulose molecules and active substances. The resulting freestanding devices, with a thickness of 12.46 µm—approximately one-ninth the thickness of human hair, exhibited desirable mechanical tensile strength (6.5 MPa), high pressure sensitivity (75.82 kPa −1 ), low impedance characteristics (5.83 Ω at 1 kHz), and outstanding interfacial stability, as evidenced by the ability to endure 500 cycles of tape stripping. Furthermore, due to effective self-healing and controllable induced peeling characteristics, the study is able to conduct the patterned fabrication of various ultrathin devices without the limitation of active materials. This peeling strategy based on sustainable resources offers a valuable solution for designing and optimizing ultrathin electronic devices without requiring substantial time or cumbersome processing.
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INTERMETALLICS
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2025
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IF 4.8
Liangcai Du,Xiaoqing Liu,Qianqian Kong,Lichao Gong,Zhenhua Yao
Understanding the intricate phase transformations and their impact on the mechanical properties holds paramount importance in developing high entropy alloys (HEAs) with ideal properties, yet it remains challenging and underexplored. In this study, a series of novel CrFeMnNi (2-x) Ti x (x = 0, 0.5, 1, and 1.5 at.%) HEAs were meticulously designed based on the established Valence Electron Concentration (VEC) rule, with the VEC values systematically varied as the atomic composition (Ni, Ti) changed. The microstructure, phase transformation behavior, mechanical properties, and strengthening mechanisms were systematically investigated. We found that the HEA powders exhibited phase behavior consistent with the VEC rules. The spark plasma sintered (SPSed) HEA bulk samples exhibited a phase transformation attributed to the precipitation of Cr and Mn within the matrix, resulting in the formation of the σ phase. Quantitative calculation of the strengthening mechanisms revealed that grain boundary strengthening and precipitation strengthening were the primary contributors to the high strength of the HEA bulk samples. These findings not only advance the utilization of the VEC rules in HEA material design but also contribute to the understanding of the phase behavior and mechanical properties of HEAs, facilitating the design of high performance HEAs.
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SURFACE & COATINGS TECHNOLOGY
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2025
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IF 6.1
Jingsi Wang,Shuang Liu,Guibin Lou,Ya Chen,Haozhe Pang,Yachao Song,Syed Mesum Raza Naqvi,Kai Zhou,Zongjun Tian,Muhammad Ali Nasir,Dongsheng Wang,Lida Shen
High infrared emissivity coatings have important engineering value in aerospace and electronic devices. In this study, a new method for preparing high infrared emissivity coatings using magnetic field-assisted jet electrodeposition was prepared. The magnetic field-assisted jet electrodeposition technique can be used to prepare coatings with rough structures, and the infrared emissivity of nickel particle coatings can reach 0.80 at a magnetic field intensity of 100 mT, which is significantly improved compared with the nickel coatings (0.155) prepared by conventional electrodeposition. A nickel-based SiC composite coating with high infrared emissivity was prepared by combining magnetic field-assisted jet electrodeposition with SiC particles. Compared with the nickel particle coating, the infrared emissivity of the nickel-based SiC composite coating is further improved. At a concentration of 6 g/L SiC particles, the infrared emissivity of the nickel-based SiC composite coating reached 0.94. The synergistic effect of magnetic field-assisted jet electrodeposition and SiC particles can realize the nickel coatings into coatings with high infrared emissivity.
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JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Yi-Fei Di,Nan Bu,Jia Li,Jun Xiang,Xin Kang,Dong-Mei Ma,Yi-Bo Wang,Rong-Da Zhao,Fu-Fa Wu
The CoMoO 4 /NiCo 2 Se 4 nanocomposite, synthesized via hydrothermal and vapor deposition methods, demonstrates exceptional multifunctional performance for energy storage and electrocatalysis. As a supercapacitor electrode, it achieves a high specific capacitance of 6445.7 mF/cm 2 at 1 mA/cm 2 and retains 71.4 % capacitance after 5000 cycles, with an energy density of 753.9 μWh/cm 2 at a power density of 75.7 μW/cm 2 , attributed to the synergistic effects between the CoMoO 4 and the conductive NiCo 2 Se 4 . Furthermore, the material exhibits outstanding bifunctional catalytic activity for alkaline water splitting, delivering low overpotentials of 270.6 mV (oxygen evolution reaction) and 177.3 mV (hydrogen evolution reaction) at 50 and 10 mA/cm 2 , respectively, with Tafel slopes of 131.4 and 131.0 mV/dec. The cell voltage of overall water-splitting is 1.46 V (10 mA/cm 2 ) and a high stability performance for 14 h. The CoMoO 4 /NiCo 2 Se 4 not only ensures efficient ion/electron transport but also creates interfacial electronic modulation through heterointerfaces, while the hierarchical nanostructure facilitates electrolyte penetration, collectively advancing energy storage capability, catalytic kinetics, and overall conversion efficiency, thereby underscoring its dual-functional superiority.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Ruifeng Xu,Ke Wang,Jiaxin Liu,Zhongkang Cao,Wenbo Wang,Xu Zhang,Bingjun Yang,Juan Yang,Xianfeng Fan,Tongtong Yu,Pengjun Ma
The replacement of the oxygen evolution reaction (OER) with the urea oxidation reaction (UOR) coupled with the hydrogen evolution reaction (HER) in water electrolysis systems is regarded as a highly promising strategy for reducing hydrogen production energy consumption, enhancing hydrogen efficiency, and even effectively treating urea wastewater. However, the design and fabrication of UOR catalysts in the UOR coupled HER catalytic water electrolysis system remains one of the significant challenges. Herein, we employed a facile, operable, and practical solid-state reaction method to synthesize two representative types of transition metal phosphosulfide (MPS 3 ) catalysts, and the intrinsic and structural characteristics of these catalysts were systematically characterized. Subsequently, the MPS 3 catalyst was deposited onto a nickel foam substrate (NF) to obtain the MPS/NF catalytic electrode. The UOR and OER performance of the MPS 3 /NF catalytic electrode was evaluated to elucidate the competitive mechanisms of UOR and OER within the MPS 3 catalyst. Results indicated that the UOR driving potentials required for NiPS 3 /NF and FePS 3 /NF electrodes were individually reduced by 101 mV and 33 mV compared to the corresponding OER driving potentials under the condition of 100 mA/cm 2 , and NiPS 3 /NF and FePS 3 /NF electrodes could even achieve large UOR current density of 300 mA/cm 2 at potentials as low as 1.630 V (vs. RHE) and 1.647 V (vs. RHE), respectively. In-situ Raman spectroscopy combined with XPS analysis revealed distinct catalytic pathways for NiPS 3 and FePS 3 . During catalysis, NiPS 3 undergoes surface reconstruction to form γ-NiOOH, which exhibited superior selectivity toward urea oxidation, whereas FePS 3 predominantly generated β-FeOOH, whose activity was compromised by competing oxygen evolution, thereby conferring weaker UOR selectivity compared with NiPS 3 . For the UOR-coupled HER whole-cell urea electrolysis assessment, the NiPS 3 /NF and FePS 3 /NF whole-cell attained urea degradation efficiencies of 89.04 % and 69.61 %, respectively. This work provided a novel strategy and practical approach for the development of novel, efficient, and cost-effective MPS 3 catalysts for UOR coupled with HER in the treatment of urea wastewater for synergistic hydrogen production.
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DIAMOND AND RELATED MATERIALS
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2025
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IF 5.1
Jiangyu Wu,Jianghua Wu,Yuwen Xue,Yunwu Zheng,Jingyan Liu,Xu Lin,Fulin Yang,Yuan Zou,Can Liu
This study develops an environmentally friendly method to create S/P dual-doped porous carbon (WSC-SP-800) from walnut shells for supercapacitor electrodes. Compared with the raw carbon materials, WSC-SP-800 exhibits higher specific surface area, richer microporous and mesoporous structures, as well as superior electrochemical performance. The specific surface area rises from 1533.40 m 2 g −1 to 3061.96 m 2 g −1 , and the capacitance increases from 156 F g −1 to 417 F g −1 at a current density of 0.5 A g −1 . Additionally, WSC-SP-800 maintains a capacitance of 270 F g −1 even at a high current density of 10 A g −1 . When assembled into a symmetric supercapacitor, it achieves an energy density of 13.15 Wh kg −1 at a power density of 250 W kg −1 and retains 100 % of its capacity after 5000 cycles. This work not only achieves cost-effective, high-performance energy storage with environmentally benign characteristics but also establishes a novel paradigm for the valorization of biowaste through heteroatom engineering, providing a sustainable pathway for supercapacitor development.
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CHEMICAL PHYSICS LETTERS
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2025
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IF 3.1
Siyuan Yin,Song Li,Muying Sun,Zhongsheng Wen,Juncai Sun
Transition metal oxides (TMOs) are promising high-capacity anodes for Li-ion batteries, but their low initial Coulombic efficiency (ICE) hinders practical application. Here, a Ni/Mn 3 O 4 composite was prepared via ball milling, where nano-Ni dispersion enhanced phase transition, increasing ICE from 39.7 % to 57.8 %. Nano-Ni reduced charge transfer resistance and enhanced pseudocapacitance contribution, improving kinetics. DFT calculations revealed Ni’s catalytic role in lowering the Li O bond-breaking energy barrier and suppressing irreversible phase transitions. TEM confirmed Ni-promoted Mn 3 O 4 phase transformation and accelerated early-stage reaction kinetics. This study provides a strategy for designing conversion-type anodes with high ICE and kinetics.
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JOURNAL OF POWER SOURCES
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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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