COMPOSITES PART B-ENGINEERING
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2025
·
IF 14.2
Bingbing Qiu,Donghui Zhang,Ruiming Fang,Yanfang Wang,Banglong Shen,Junhao Dai,Huaqiang Chu
Electrocatalytic hydrogen production is a green and feasible method for obtaining hydrogen energy. However, the bottlenecks of high cost, low catalytic activity and inferior stability urgently need to be addressed, and constructing advanced catalysts with optimized microscopic morphology and crystal structure is a feasible and effective strategy to overcome this barrier. Herein, an artful strategy of in-situ grown coupled with N doping and C encapsulation was employed to obtain the NC/NiO–Mo/NF with biomimetic cattle stomach-liked porous structure, which can offer shortcut for ion transportation and expose more active sites for H∗ adsorption. Particularly, the constructed NiMoO 4 –NiO heterojunction in NC/NiO–Mo/NF can significantly boost the hydrogen evolution activity. Meanwhile, the density functional theory (DFT) confirm that the construction of the crystalline-amorphous heterojunction induces electron transfer from NiMoO 4 to NiO, promoting a downshift in the d-band center, thereby achieving a near-thermoneutral free energy for the hydrogen evolution reaction (HER). The de-signed electrocatalyst exhibits exceptional HER activity, with a small overpotential of 48 mV to achieve a current density of 10 mA cm −2 . It is important that NC/NiO–Mo/NF exhibits exceptional HER stability, with current density of 50 mA cm −2 for 100 h. The finding provides a feasible strategy for the fabrication of nonprecious-metal-based HER electrocatalysts with high activity and stability toward industrial water electrolysis.
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ADVANCED FUNCTIONAL MATERIALS
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2025
·
IF 19
Haoze Li,Mengyao Wang,Yingbing Zhang,Ye Chen,Li Wang,Jianping Yang
The photoreforming of plastic waste into high-value chemicals and H 2 fuels presents a sustainable and energy-efficient strategy to mitigate environmental pollution and energy crises. However, achieving high selective valuable products remains challenging due to the indiscriminate cleavage of chemical bonds in plastics. Herein, this study reports a sulfur-vacancies-rich ZnIn 2 S 4 photocatalyst decorated with ultrafine Ni nanoparticles (Ni 0.2 @ZIS-S v ) that enables highly photoreforming of poly(ethylene terephthalate) (PET) into formate and H 2 via targeted C─C bond cleavage under mild alkaline conditions. The Ni 0.2 @ZIS-S v photocatalyst achieves an H 2 evolution rate of 4.5 mmol g −1 h −1 , a 20.2-fold enhancement over pure ZnIn 2 S 4 , while formate is the primary liquid product with the selectivity reaching 84.8%. Mechanistic analysis reveals that the combined effects of Ni nanoparticles and sulfur-vacancies modify the electronic structure of ZnIn 2 S 4 , improving charge separation, lowering the energy barrier for H 2 generation, and facilitating selectively C─C bond cleavage. This dual optimization enhances both hydrogen yield and formate selectivity, demonstrating an effective strategy for designing advanced photocatalysts to upcycle plastic waste into high-value chemicals and clean energy.
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CARBON
·
2025
·
IF 11.6
Sain Bux Jamali,Tauqeer Haidar Qamar,Sibt ul Hassan,Nouman Ahmed,Farhan Ali,Shakeel Ahmad,Shengxiang Huang,Lianwen Deng
A facile and scalable polymer bubbling technique was used to fabricate three-dimensional nickel-embedded nitrogen-doped porous carbon foams (3D Ni@NPCFs) exhibiting high-performance electromagnetic wave absorption. The 3D Ni@NPCFs were characterized by their unique 3D interconnected porosity and the cooperative effect of conductive magnetic Ni nanoparticles and nitrogen incorporation. The optimal sample achieved reflection loss (RL) of -47.20 dB at 6.05 GHz and an effective absorption bandwidth (EAB) of 7.4 GHz within the absorber thickness of 3.0 mm. This superior performance is attributed to the unprecedented synergistic interplay between the tailored 3D porous network, which facilitates multiple scattering and prolonged wave propagation, and the embedded Ni nanoparticles coupled with nitrogen doping, which enhances both the magnetic and dielectric losses. Furthermore, the optimal sample demonstrated a simulated radar cross-sectional reduction of up to 28.43 dBm 2 . The 3D Ni@NPCFs show great promise as high-performance absorbers for electromagnetic protection applications.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yaqi Wu,Jianhua Qian,Yanan Wang,Jinjuan Xing,Junhua Li,He Huang,Xueming Kang,Jiasheng Xu
Developing transition metal oxide-based catalysts with both high thermal stability and catalytic activity for the effective volatile organic compounds (VOCs) removal remains a major challenge in heterogeneous catalysis. In this work, a series of Cu, Mn, Co and Ni substituted Co 3 O 4 spinel catalysts with a large number of oxygen vacancies were produced as extremely stable and active substances for the oxidation of toluene. The CuCo 2 O 4 catalyst, prepared through transition metal substitution, demonstrated exceptional performance with T 50 , T 90 , and complete conversion temperatures of 204 °C, 220 °C, and 228 °C, respectively. Furthermore, the CuCo 2 O 4 catalyst displayed markedly enhanced thermal stability compared to other catalysts, which was crucial for practical implementation. Its superior catalytic activity originated from electron transfer between Co and Cu cations, facilitated by lattice oxygen, which increased the Co 3+ /Co 2+ ratio. This structural modification strengthened oxygen migration and reducibility within the spinel framework, facilitating efficient regeneration of lattice oxygen and rapid activation of adsorbed oxygen species. Kinetic analyses corroborated these findings, revealing that CuCo 2 O 4 possessed the lowest activation energy ( E a = 40.40 kJ/mol), thereby reducing the energy barrier for toluene oxidation. These results demonstrate that the CuCo 2 O 4 catalyst represents a promising candidate for practical applications, combining high catalytic activity for toluene oxidation with exceptional operational durability and thermal stability.
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Journal of Environmental Chemical Engineering
·
2025
·Vol. 13
·期 6
·120413
·
IF 7.2
Yiting Lei,Yulong Ma,Yonggang Sun,Liqiong Wang
Lignin, a three-dimensional network biopolymer, presents catalytic challenges due to its recalcitrant C(aryl)–O/C(aryl)–C bonds and diverse oxygen functionalities. To address this, we engineered Mo 2 C-decorated Ni-Mo bimetallic catalysts (Ni- Mo 2 C@NC-x) via dopamine-mediated self-assembly, achieving unprecedented 2D nanosheet architectures. The optimized Ni-Mo 2 [email protected] exhibited a 10.2-fold surface area enhancement (230.4 m 2 ·g⁻ 1 vs. 22.6 m 2 ·g⁻ 1 for Ni@NC), maximizing accessible active sites. The highly dispersed MoC 2 phase enhanced the graphitization degree, facilitated electron transfer while simultaneously increased Lewis and Brønsted acid densities. Furthermore, the Mo 2 C phase effectively enriched Mo 5+ species, which promoted selective cleavage of C–O and C–C bonds via oxygen vacancy generation. The synergistic interplay between the Mo 2 C phase and Ni metal centers achieved 95.69 % lignin oil conversion with 85.25 % cycloalkane selectivity. This work establishes a multifunctional catalyst design paradigm where tailored defect-acid cooperativity overcomes lignin depolymerization-deoxygenation trade-offs.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Yanmei Zheng,Yinghua Zhang,Ziwei Hang,Jianghong Ouyang,Qichao Chen,Xinli Guo,Zupeng Chen
Hydrogen peroxide (H 2 O 2 ) photosynthesis coupled with biomass upgrading is a promising alternative to traditional oxidative routes, yet its efficiency is fundamentally constrained by slow water oxidation kinetics and reliance on sacrificial agents. Herein, a Ni-doped Bi 2 WO 6 /graphitic carbon nitride (Ni-BWO/CN) heterojunction is developed to investigate the coupling of H 2 O 2 photosynthesis and glucose oxidation, with an H 2 O 2 production rate of 2.275 mM h − 1 (2.5 times higher than BWO), alongside a glucose conversion rate of 27 % and 82 % selectivity toward arabinose. The enhanced performance is attributed to the Ni doping in the BWO lattice, which modulates the electronic structure and suppresses charge recombination. In situ FT-IR spectra reveal a superoxide-mediated two-electron reduction pathway for H 2 O 2 synthesis as well as glucose oxidation via ·O 2 − -mediated and ·OH-driven intermediate mechanisms. This strategy advances the sustainable production of H 2 O 2 and high-value chemicals through rational photocatalyst design.
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PubMed
高影响因子
ChemSusChem
·
2021
·Vol. 14
·期 4
·1140-1154
·
IF 8.928
Yongjian Niu,Chunhua Zhang,Yuanyuan Wang,Dong Fang,Linlin Zhang,Cheng Wang
Graphical Knight in shining armor : A dual-chainmail-bearing N-doped carbon layers and nanotubes encapsulating a metallic Ni core (Ni@NC@NCNT) showed outstanding stability and selectivity towards CO 2 reduction into CO at moderate potentials, outperforming NCNTs, Ni@NC with single chainmail, Ni@NC/NCNT with Ni@NC sitting on NCNTs, and most state-of-the-art catalysts. This was attributed to enhanced structure robustness, maintained local pH value and boosted CO 2 adsorption capacity and strength. It still remains challenging to simultaneously achieve high stability, selectivity, and activity in CO 2 reduction. Herein, a dual chainmail-bearing nickel-based catalyst (Ni@NC@NCNT) was fabricated via a solvothermal-evaporation-calcination approach. In situ encapsulated N-doped carbon layers (NCs) and nanotubes (NCNTs) gave a dual protection to the metallic core. The confined space well maintained the local alkaline pH value and suppressed hydrogen evolution. Large surface area and abundant pyridinic N and Ni δ + sites ensured high CO 2 adsorption capacity and strength. Benefitting from these, it delivered a CO faradaic efficiency of 94.1 % and current density of 48.0 mA cm −2 at −0.75 and −1.10 V, respectively. Moreover, the performance remained unchanged after continuous electrolysis for 43 h, far exceeding Ni@NC with single chainmail, Ni@NC/NCNT with Ni@NC sitting on the walls of NCNT, bare NCNT and most state-of-the-art catalysts, demonstrating structural superiority of Ni@NC@NCNT. This work sheds light on designing unique architectures to improve electrochemical performances.
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高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Xiaohong Wang,Bin Yang,Yuqing Yang,Huijie Lu,Zhiguo Hou,Hao Wang,Ziyi Wang,Yue Zhang,Ru Xia,Jiasheng Qian,Ning Jia,Yuchao Ke
Phase-change composites (PCCs) absorb and release heat in the process of phase change without changes in temperature, which makes them a hot spot in the field of heat storage applications. However, in practical applications, there still exist some shortcomings such as poor thermal conductivity and easy leakage. Based upon this, a three-dimensional (3D) porous aerogel with point-surface heat conduction pathway was prepared in this work using polydopamine-Ni-graphene (PDA-Ni-GNS), carboxylated cellulose nanofiber (CNF-C), and sodium alginate (SA) by a combination of prefreezing orientation and freeze-drying. The thermally conductive PPCs were prepared by introducing PEG into the aerogel matrix via vacuum impregnation. Thanks to the successful preparation of PDA-Ni-GNS, the contact area between fillers is greatly enlarged and dispersed in the matrix, which provides a prerequisite for reducing the interface thermal resistance between filler–filler and filler–matrix. Meanwhile, the aerogel from freeze-drying formed a vertically arranged layered 3D thermal network structure inside the composite. The network structure makes the thermal conductivity (TC) in both vertical and horizontal directions of the PDA-Ni-GNS/CNF-C/SA/PEG PCCs greatly improved (at a filler loading of 4 wt %) without any obvious PEG leakage. In the LED lamp heat dissipation and CPU heat dissipation tests, it was also seen that the PDA-Ni-GNS/CNF-C/SA/PEG PCCs had rather excellent TC values. In addition, it was jointly confirmed by TG, DSC, and cyclic DSC that the prepared thermally conductive PCCs also had excellent heat storage performance, high latent heat, good thermal stability, as well as low degree of supercooling. The PCCs prepared by this work have good application prospects in the field of thermal management of microelectronic devices.
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Sustainable Materials and Technologies
·
2025
·
IF 9.2
Zhiyi Guo,Tengfei Li,Hao Zhou,Changwei Tan,Ximei Wang,Shuhong Nie,Wenya Xu,Fangfang Pei,Xiuqing Meng,Xinzhou Wu,Xiaolian Chen,Wenming Su,Kai Zhao,Changqing Ye
Flexible electrochromic devices (FECDs) and electrochromic fabrics (ECFs) have attracted great attention in fashion clothing decoration and camouflage due to their low energy consumption and bi-stability. However, the complex and hierarchical structures of fabric substrates pose formidable challenges to the excellent and stable conductivity of ECFs. Here, we developed novel ECFs with excellent EC properties and outstanding stability by integrating FECDs with polyester fabric. Firstly, highly conductive silver (Ag)/nickel (Ni) mesh was heat-laminated on the thermoplastic polyurethane (TPU) film, serving as flexible electrode with high transmittance. On this basis, the FECDs exhibit an exceptionally high transmittance (46.4 %), rapid response time (bleaching for 0.5 s at 0.8 V and coloring for 0.9 s at −0.4 V), outstanding stability (2.6 % decreased after 5000 cyclic switching), and low-power consumption (<0.05 J per cycle in 60 cm 2 FECDs). By harnessing the thermoplastic property of TPU, the FECDs can be readily transferred to fabric for the realization of ECFs, without compromising their comprehensive performances. More importantly, the outstanding conductivity and mechanical stability of ECFs under various challenging conditions (mechanical bending, physical damage, etc.) are unparalleled. We believe the simple-structured high-performance ECFs would be promising for flexible smart textile in any textile-based markets, such as wearable and intelligence camouflage.
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Catalysts
·
2025
·Vol. 15
·期 8
·703
·
IF 4
Yitong Zhao,Meng Liu,Yao Ning,Ying Zhang,Zhijie Wu
In our previous work, we fabricated Ni single-atoms within Beta zeolite (Ni1@Beta-NO3−) using NiNO3·6H2O as a metal precursor without any chelating agents, which exhibited exceptional performance in the selective hydrogenation of furfural. Owing to the confinement effect, the as-encapsulated nickel species appears in the form of Ni0and Niδ+, which implies its feasibility in metal catalysis and coordination catalysis. In the study reported herein, we further explored the hydrogen production and olefin oligomerization performance of Ni1@Beta-NO3−. It was found that Ni1@Beta-NO3−demonstrated a high H2generation turnover frequency (TOF) and low activation energy (Ea) in a sodium borohydride (NaBH4) hydrolysis reaction, with values of 331 min−1and 30.1 kJ/mol, respectively. In ethylene dimerization, it exhibited a high butylene selectivity of 99.4% and a TOF as high as 5804 h−1. In propylene oligomerization, Ni1@Beta-NO3−demonstrated high selectivity (75.21%) of long-chain olefins (≥C6+), overcoming the problem of cracking reactions that occur during oligomerization using H-Beta. Additionally, as a comparison, the influence of the metal precursor (NiCl2) on the performance of the encapsulated Ni catalyst was also examined. This research expands the application scenarios of non-noble metal single-atom catalysts and provides significant assistance and potential for the production of H2from hydrogen storage materials and the production of valuable chemicals.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wendi Zhu,Wei Gao
In this study, Ni/MWCNTs/CuO/Fe 2 O 3 composite nanomaterials were synthesised by a simple hydrothermal method, using Fe 2 O 3 as a substrate material and taking advantage of the excellent properties of carbon nanotubes, which possess a large surface area, and the catalytic ability of Ni. These nanocomposites are easy to synthesise and cost-effective. Compared to CuO/Fe 2 O 3 and MWCNTs/CuO/Fe 2 O 3 , Ni/MWCNTs/CuO/Fe 2 O 3 exhibits higher sensitivity and response values for H 2 S at room temperature. In particular, the best performance was achieved when the content of Ni/MWCNTs was 5 wt%. The sensing material, featuring a short response/recovery time (4 s/10 s), a low lower limit of detection (10 ppb), a high response value (100 ppm, 125), and high selectivity, is an excellent detection material for H 2 S. The enhanced performance of the composites can be attributed to several factors. Firstly, the formation of multiple heterojunctions and Schottky barriers facilitates electron transfer. Secondly, the interconnection of the conductive backbones of the MWCNTs increases the area of mutual contact, thereby providing more active sites for the reaction. Lastly, the highly efficient electrocatalysis of Ni reduces the activation energy of the reaction, accelerating the reaction kinetics, which in turn improves the gas-sensitive performance of the sensing materials for H 2 S.
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ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Chen Liu,Siwu Li,Lin Li,Qiyue Luo,Liang Ming,Ziling Jiang,Ziyu Lu,Miao Deng,Jie Yang,Shijie Cheng,Chuang Yu
The sulfide electrolyte-based all-solid-state batteries with high-nickel layered oxide cathodes face significant challenges due to the narrow electrochemical window of sulfides and severe side reactions caused by direct contact with high-voltage oxide cathode materials such as LiNi 0.9 Mn 0.05 Co 0.05 O 2 (NCM90). Here, we successfully synthesized Li 3 InCl 6 (LIC) halide electrolytes through ball-milling followed by annealing method, achieving the ionic conductivity of 2.0 mS cm −1 at room-temperature. The interface between this electrolyte and NCM90 cathode material without any interface modification is stable. By introducing the LIC electrolyte layer, the NCM90/LIC+Cl1.5/Li-In battery exhibits significantly improved electrochemical performance at different temperatures, particularly in terms of initial discharge capacity. Notably, the battery demonstrates outstanding discharge capacity and cycling stability at low temperatures. Experimental investigations reveal that the introduction of the LIC electrolyte with high oxidation potential facilitates the H2-H3 phase transition in NCM90 during high-voltage operation, which is critical for enhancing the discharge capacity. This work provides fundamental insights into interfacial engineering strategies for high-voltage sulfide-based all-solid-state battery systems.
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危险品化学品经营许可证（带存储）