APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Zihao Guo,Zeqi Liu,Chaoxuan Wang,Lei Qian
Here, oxygen vacancy was introduced into hexagonal β-Ni(OH) 2 (NV) nanosheets to prepare poly (vinylidene fluoride-co-hexafluoropropylene)-based dielectric composites. Oxygen vacancy gradients were controlled, and the enhanced effects on energy storage performance were systematically investigated. It was found that the oxygen vacancy elevated the Ni 2+ /Ni 3+ ratio, shifted the Fermi level downward and induced formation of deep trap states. The moderate oxygen vacancies produced uniformly distributed deep strap states, which delayed the carrier migration by the capture-release mechanism. The Fermi level (E v − E f ) of NV 1.5 was 1.064 eV and showed the smallest energy separation from the valence-band, resulting in the highest interfacial potential barrier and inhibiting the charge injection. So, the oxygen vacancy obviously affected leakage current, breakdown strength and energy density. It was observed that leakage current density of the composites reduced to 3.48 × 10 −8 A/cm 2 . At the 0.3 wt% loading of NV1.5, the composite achieved a breakdown strength of 792.97 kV/mm and an energy density of 21.15 J/cm 3 (88.17 % over the matrix), with charge–discharge efficiency of 74.12 % and below 1 % performance degradation after 10 4 cycles. This work establishes a novel route based on defect engineering for dielectric storage materials at the atomic level. Download: Download high-res image (101KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Yu-Zheng Wang,Shu-Qi Li,Zi-Kai Zhou,Chao-Jun Chen,Wei Yang,Si-Nuo Zhang,De-Zheng Yang
The development of mild and green ammonia synthesis is a significant and challenging research. In this study, a nanosecond pulse-driven coaxial double dielectric barrier discharge reactor was combined with M/γ-Al 2 O 3 (M = Co, Ni, Co–Ni) catalysts for efficient ammonia synthesis. Key parameters including pulse voltage, gas flow rate, and N 2 /H 2 molar ratio were systematically investigated. The Co–Ni/γ-Al 2 O 3 catalyst achieved the best energy efficiency of 1.11 g/kWh and a synthesis rate of 226.33 μmol g −1 h −1 under optimal conditions, which is 3.44 times higher than that of the plasma only system. Characterization revealed superior metal dispersion, smaller metal particle size, and larger specific surface area for Co–Ni/γ-Al 2 O 3 . Electrical diagnostics and optical emission spectroscopy (OES) showed that catalyst packing enhances discharge intensity and promotes key active species (N 2 ∗, N 2 + , and H α ). Synergistic effects between Co and Ni sites promote ammonia formation. This work provides new insights for designing high-efficiency plasma-catalytic ammonia synthesis systems.
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2026
·
IF 18.1
Fang Jiongchong,Chen Zuochao,Li Junqiang,Zhang Qing,Zeng Lin,Yang Yaoxian,Zhang Xueqiang,Zhang Hui,Gao Haifeng,Lu Xinxin,Ma Jugang,Xie Zhirun,Li Ailong,Yang Fuyuan,Ng Yun Hau,Zeng Guosong
Alkaline hydrogen evolution reaction holds immense promise for sustainable energy conversion due to its inherent compatibility with earth-abundant electrocatalysts and potential for large-scale, high-purity hydrogen production. However, sluggish kinetics remain a formidable bottleneck for its industrial deployment. Although incorporating oxophilic components is widely used to promote water activation, the catalytic role of oxygen-affinity-related sites is often interpreted statically, without considering dynamic evolution of local coordination under operating conditions. Here, we synthesize a crystalline-amorphous Ni/TiO 2 heterojunction via a grain-boundary segregation strategy and combine multi-modal operando techniques to directly visualize reversible, bias-induced reconstruction of the oxophilic component. These observations provide direct evidence that, at the Ni/TiO 2 interface, oxygen affinity is a tunable parameter encoded by nanoscale coordination and interfacial chemistry, and elucidate how its modulation governs water dissociation and hydroxyl handling. We demonstrate that the resulting four-coordinated Ti sites serve as highly efficient centers for water dissociation and hydroxyl adsorption, thereby synergistically optimizing the hydrogen adsorption/desorption energetics. This work offers a mechanistic and methodological basis for rational nano-heterointerfaces engineering in advanced electrocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL REVIEW B
·
2024
·Vol. 109
·期 10
·104402
·
IF 3.2
Kejia Zhu,Mingjie Wang,Yazhou Deng,Mingliang Tian,Bin Lei,Xianhui Chen
We have grown a series of single crystals of two-dimensional van der Waals ferromagnet $\mathrm{F}{\mathrm{e}}_{3}\mathrm{GaT}{\mathrm{e}}_{2}$ substituted with Co or Ni. The large single crystals of ${(\mathrm{F}{\mathrm{e}}_{1\ensuremath{-}x}\mathrm{C}{\mathrm{o}}_{x})}_{3}\mathrm{GaT}{\mathrm{e}}_{2} (0\ensuremath{\le}x\ensuremath{\le}0.55)$ and ${(\mathrm{F}{\mathrm{e}}_{1\ensuremath{-}x}\mathrm{N}{\mathrm{i}}_{x})}_{3}\mathrm{GaT}{\mathrm{e}}_{2} (0\ensuremath{\le}x\ensuremath{\le}0.46)$ were characterized with x-ray diffraction, magnetic susceptibility, electrical resistivity, and Hall measurements. Our results show that the magnetic transition temperatures of $\mathrm{F}{\mathrm{e}}_{3}\mathrm{GaT}{\mathrm{e}}_{2}$ are gradually suppressed upon Co or Ni doping. A small amount of Co or Ni doping results in a significant increase of the coercive field. In particular, Co doping tunes the crystals from ferromagnetism to antiferromagnetism and then to the spin-glass state, while Ni doping tunes the crystals from ferromagnetism to spin-glass states. The strong doping-dependent magnetic properties suggest that $\mathrm{F}{\mathrm{e}}_{3}\mathrm{GaT}{\mathrm{e}}_{2}$ has great potential for spintronic applications.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Guanglin Cao,Xiao Chen,Huibin Liu,Weilin Shen,Changhai Liang
The catalytic reduction of nitroaromatic compounds to aromatic anilines is a widely employed route for producing high-value refined chemicals and large-scale commodities. Developing highly efficient catalysts represents a promising strategy to achieve continuous and selective hydrogenation of functionalized nitroarenes under flow conditions. In this work, γ-Al 2 O 3 @Ni/FeO x egg-shell microspherical catalysts featuring high atomic dispersion, high specific surface area, and tunable active sites are designed by strategically harnessing hydrotalcite-inspired characteristics, which integrates a Ni–FeO x interfacial synergy into an egg-shell architecture for continuous-flow selective hydrogenation. In the continuous flow selective hydrogenation of o -chloronitrobenzene, the γ-Al 2 O 3 @Ni/FeO x -3 egg-shell microspherical catalyst presents a turnover frequency (TOF) of 30.16 h −1 , substantially higher than those of γ-Al 2 O 3 @Ni and γ-Al 2 O 3 @FeO x . Compared with the uniform Ni 3 Fe 1 /Al 2 O 3 catalyst, the egg-shell catalyst also exhibits enhanced mass transfer efficiency. The egg-shell catalyst enables an increased presence of electron-rich Ni δ- sites and FeO x species rich in oxygen vacancies on the surface of γ-Al 2 O 3 microspheres. Due to the formation of Ni δ- -O v -Fe 2+ , the egg-shell catalyst exhibits remarkable H-spillover capability, significantly enhancing the selective hydrogenation of o -chloronitrobenzene to o -chloroaniline. The apparent activation energy of the γ-Al 2 O 3 @Ni/FeO x -3 catalyst is only 22.99 kJ mol −1 , much lower than those of other egg-shell catalysts, indicating the synergistic integration of metallic Ni sites and oxygen vacancies. In addition, the as-prepared γ-Al 2 O 3 @Ni/FeO x -3 egg-shell catalyst presents long-term stability over 80 h and broad substate scope. This work offers comprehensive guidance for the rational design of industrial egg-shell catalysts, as well as establishes a solid foundation for the continuous flow selective hydrogenation process, aimed at producing substituted anilines from functionalized nitroarenes.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Wenlong Gao,Jinpeng Wei,Yonggang Sun,Yuyu Wang,Feng Lin,Yulong Ma
A composite catalyst that combines acid and metal catalysis has been developed. • Selectivity of up to 83.12 % toward MAHs achieved in lignin pyrolysis. • Heating rate affects routes and activation energy in catalytic lignin conversion. • SiW affords B acid sites while Ni centers stabilize intermediates and inhibit coking. To address the challenges of complex deoxygenation pathways and low monoaromatic hydrocarbon (MAHs) selectivity in the catalytic conversion of lignin, a series of SiW/Ni-MCM-41 metal–acid bifunctional catalysts were synthesized via an incipient wetness impregnation method. The effects of silicotungstic acid (SiW) loading ratios on the physicochemical properties of the catalysts and their performance in lignin catalytic pyrolysis were systematically investigated. Characterization results revealed that both SiW and Ni species were highly dispersed on the surface of the MCM-41 support, with interactions between them. With increasing SiW loading, specific surface area and pore volume decreased, Brønsted acid proportion increased, and total acid sites decreased mainly due to Lewis acid loss, enabling Brønsted/Lewis acid balance tuning. Catalytic performance evaluation demonstrated that the catalyst with a SiW-to-Ni-MCM-41 mass ratio of 1:2 exhibited the optimal lignin conversion (80.25 %) and MAHs selectivity (83.12 %), alongside excellent universality in substrate extension experiments. Kinetic analysis indicated that the apparent activation energy is heating-program dependent. In-situ FTIR confirmed that the Brønsted acid sites provided by SiW promoted deoxygenation and alkylation reactions, the Ni metal centers assisted deoxygenation and stabilized the aromatic ring structure via hydrogen-transfer-related pathways, while inhibiting condensation and coking side reactions to a certain extent; and the mesoporous MCM-41 framework provided a highly dispersed environment and a possible confinement-like effect, collectively driving the efficient conversion of lignin into monoaromatic hydrocarbons. This study provides a novel design strategy for metal–acid synergistic catalysts in the field of high-value conversion of lignin. Download: Download high-res image (144KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Xiaoxue Zhang,Ru Jia,Zhen-Feng Huang,Lun Pan,Chengxiang Shi,Xiangwen Zhang,Guidong Yang,Ji-Jun Zou
Ni-doped Cu nanowires catalyst enables Cu sites to activate NO and Ni sites to accelerate water dissociation to supply *H. • In situ tests confirm Ni doping reduces charge transfer resistance, accelerates the Volmer step, and increases *H coverage. • CuNi 10% NWs catalyst has industrial-scale current density (>1000 mA cm −2 ) and 90.35% NH 3 Faradaic efficiency in a flow cell. • CuNi 10% NWs catalyst achieves 82.47% NH 3 Faradaic efficiency in a membrane electrode assembly with excellent stability. The electrocatalytic nitric oxide reduction reaction (NORR) presents a promising method for simultaneously mitigating nitric oxide (NO) pollution and synthesizing ammonia (NH 3 ). However, its practical application is hindered by sluggish kinetics, primarily due to inefficient water dissociation, which results in an inadequate supply of active hydrogen (*H) and thereby limits the hydrogenation of nitrogen-containing intermediates. Herein, we present Ni-doped Cu nanowires as a high-performance electrocatalyst for the NORR. The optimized catalyst with a Ni/(Ni + Cu) molar ratio of 10% (CuNi 10% NWs) delivers an industrial-scale current density exceeding 1000 mA cm −2 in a flow cell, achieving an exceptional Faradaic efficiency (FE) of 90.35% and an NH 3 yield rate of 6.84 mmol h −1 cm −2 (17.28 mmol g cat −1 h −1 ) at −1.0 V vs. reversible hydrogen electrode. Furthermore, in a membrane electrode assembly, the CuNi 10% NWs achieved an NH 3 FE of 82.47% and an NH 3 yield rate of 4.44 mmol h −1 cm −2 (8.88 mmol g cat −1 h −1 ). Remarkably, in situ electrochemical impedance spectroscopy and Tafel slope analyses reveal that Ni doping reduces the interfacial charge transfer resistance of Cu nanowires, accelerates the rate-determining Volmer step of water dissociation, and facilitates the generation and adsorption of *H intermediates. This study opens a new pathway for the resource utilization of industrial waste gas NO and the direct synthesis of NH 3 . Download: Download high-res image (156KB) Download: Download full-size image Ni-doped Cu nanowires catalyst acts as a high-efficiency catalyst for electrocatalytic NO-to-NH 3 conversion, where Cu sites activate NO and Ni sites accelerate water dissociation to enrich active hydrogen species, thus achieving superior catalytic activity for NH 3 synthesis.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Yu Shi,Fagen Wang
Ni/SiC catalysts were developed for low-temperature microwave-assisted DRM. • The interaction between microwave and Ni/SiC catalyst were revealed. • Ni/SiC interfacial polarization enhances DRM over conventional thermal. • Reactive intermediates (CH x O*, COOH*) were identified in microwave-assisted DRM. • Ea of CH 4 and CO 2 were decreased under microwave irradiation condition. Dry reforming of methane (DRM) reduces CH 4 and CO 2 emissions by producing syngas. Conventional thermal DRM requires temperatures above 973 K, leading to Ni sintering and carbon deposition. Developing Ni catalysts with high conversion at lower temperatures remains challenging. In this work, we developed Ni/SiC catalysts to investigate DRM under microwave irradiation conditions below 973 K. The Ni/SiC catalysts markedly enhanced performance of low-temperature DRM by microwave catalysis compared to conventional thermal catalysis. The comprehensive characterizations, including physicochemical properties, microwave adsorption properties, and in-situ DRIFTS, reveal that the performance enhancements are primarily attributed to interfacial polarization on the Ni-SiC surface, which generates microcurrent facilitating the formation of reactive intermediates (CH x O*, COOH*) and reducing the activation energies of CH 4 and CO 2 . The work highlights the significance of interfacial polarization on Ni/SiC catalysts in enhancing DRM performance, and the polarization strategy can be applied to other reactions under microwave irradiation conditions. Download: Download high-res image (223KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Jie Xiong,Shuo Wu,Bing Sun,Yiding Zhang,Botao Zhu,Lai Feng
W 18 O 49 with separately dispersed Ni sites was prepared as the electrocatalyst for electro-oxidation reaction of 5-hydroxymethylfurfural (HMFOR). • Ni 0.33 &W 18 O 49 promotes efficient HMFOR to 2,5-furandicarboxylic acid (FDCA) with a high yield rate (YR FDCA ) of ⁓3.37 mmol cm -2 h -1 . • Experimental and computational results reveal an indirect pathway for HMFOR, where the in-situ formed NiO(OH) acts as the proton acceptor. • A nickel foam‖Ni 0.33 &W 18 O 49 pair enables continuous production of FDCA with a high YR FDCA of ca. 0.279 g cm -2 h -1 . The electro-oxidation reaction of 5-hydroxymethylfurfural (HMFOR) provides an ideal solution for addressing the sustainable production of 2,5-furandicarboxylic acid (FDCA), a critical precursor for biodegradable polymer synthesis. However, HMFOR over non-precious catalysts may suffer from low current density and hence insufficient FDCA yield rate (YR FDCA ). In this work, a series of W 18 O 49 nanostructures with interstitially doped Ni 2+ sites (Ni x &W 18 O 49 ) are employed as the model catalyst for HMFOR. Among them, the optimal candidate Ni 0.33 &W 18 O 49 exhibits a superior performance in terms of an impressive YR FDCA of 2.88 mmol cm −2 h −1 and good durability, outperforming that of α-Ni(OH) 2 with continuously dispersed Ni-(μ 2 -OH)-Ni species. Experimental and theoretical studies reveal that the Ni&W 18 O 49 with an isolated Ni 2+ site follows an indirect pathway, where the in-situ formed NiO(OH) serves as a proton acceptor during HMFOR. It also surpasses α -Ni(OH) 2 in terms of remarkably reduced reaction barrier. Finally, an electrode pair of NF‖Ni 0.33 &W 18 O 49 is constructed to enable continuous productions of H 2 and FDCA with a high YR FDCA of 1.79 mmol cm −2 h −1 in a flowing single cell. This work thus provides fundamental insights into the design of Ni-based catalysts for highly efficient electro-oxidation of HMF to FDCA.
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Tao Wen,Xiaoyan Yang,Yanwei Yuan,Xiaoke Lv,Zhen Wang,Tianmeng Zhang,Bin Wu,Jianjun Chen
With the widespread proliferation of electronic and intelligent devices, increasingly stringent requirements have been imposed on microwave absorption materials. Ti 3 C 2 T x MXene is considered a promising microwave absorbing material with excellent properties. However, its high electrical conductivity and monotonous loss mechanism restrict its development in the field of microwave absorption. In this work, Ti 3 C 2 T x /Ni-Fe Prussian blue analogue (PBA) porous composites were synthesized via ion intercalation and chemical synthesis methods. The hollow cage-like Ni-Fe PBA was in-situ grown between the Ti 3 C 2 T x nanosheets. Benefiting from the magnetic loss characteristics and porous structure of Ni-Fe PBA, both the magnetic loss and polarization loss of Ti 3 C 2 T x were enhanced. The synergistic effect of multiple loss mechanisms optimized the impedance matching. Furthermore, the hollow cage-like structure of Ni-Fe PBA extended the propagation path and prolonged the transmission time of incident electromagnetic waves, thereby significantly improving the microwave absorption performance of the composite material. Consequently, the Ti 3 C 2 T x /Ni-Fe PBA composites achieve a significantly improved minimum reflection loss (RL min ) of −48.97 dB and an effective absorption bandwidth (EAB) of 3 GHz at a thickness of 3.9 mm. The radar stealth performance of the composite was evaluated by radar cross-section (RCS) simulation, with the maximum RCS reduction value reaching 11.75 dB m 2 . This work provides a promising strategy for developing high-performance microwave absorbers through structural and compositional design.
✓ 已验证
DOI
高影响因子
ChemCatChem
·
2026
·Vol. 18
·期 12
·e70879
·
IF 4.1
Minjie Hu,Chan Wu,Hui Yue,Sichun Yang,Xu Hou,Enxian Yuan,Jiancheng Zhou
Dry reforming of methane (DRM) offers a promising route to convert greenhouse gases into syngas, although fabricating Ni-based catalysts with long-term stability during reaction conditions remains challenging. Unlike the conventional H 2 pretreatment typically required for activating Ni-based catalysts prior to DRM, we herein reported a one-pot hydrothermal encapsulation strategy to directly synthesize Ni-Mo bimetallic catalysts confined within silicalite-1 (Ni x Mo@S-1) under CH 4 /CO 2 atmosphere for catalyst activation. In contrast to the conventional impregnation Ni 5 Mo/S-1 catalyst, this structural encapsulation approach effectively improved nickel dispersion and enhanced catalytic performance. XRD and TEM revealed that the encapsulated Ni 5 Mo@S-1 exhibited ultra-small nanoparticle size (∼2.3 nm) and Mo promoted high dispersion of Ni nanoparticles. Furthermore, XPS and XANES confirmed that Ni 5 Mo@S-1 facilitated the direct reduction of NiO to metallic Ni under CH 4 /CO 2 atmosphere, thereby inducing active Ni 0 sites and Ni-O-Si bond formation with reinforced metal-support interaction. Graphical The CH 4 /CO 2 atmosphere-induced strategy of encapsulation of Ni x Mo@S-1 enhances DRM performance. Pretreatment with different atmosphere revealed the distinct roles of CH 4 /CO 2 in fabricating the confinement structure of Ni 5 Mo@S-1 for DRM. The CH 4 /CO 2 pretreatment atmosphere directly drives the formation of both active Ni 0 and stabilizing Ni─O─Si bonds with the promotion of Mo, remarkably reinforcing metal-support interaction.
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Gaotao Cao,Tao Zhang,Jingxing Gui,Yingtao Li,Yuting Xue,Sha Long,Baojiang Liu,Chunyan Hu,Dan Yu,Wei Wang
In modern battlefield scenarios, electromagnetic interference (EMI) from dense electronic systems and radar detection, together with infrared (IR) thermal imaging surveillance, impose dual threats to the survivability of military assets. Accordingly, advanced materials capable of simultaneously delivering high-efficiency EMI shielding and effective IR stealth are in urgent demand. Herein, we propose an asymmetric impedance-matched Ni@CoFe 2 O 4 @CNTs aerogel composite, in which one side consists of a porous CoFe 2 O 4 @CNTs aerogel (absorption layer) with an optimized mass ratio of 2:1, achieving favorable impedance matching ( Z ≈ 1) and a high absorption coefficient (A = 0.77). And the other side is coated with a dense nickel layer via selective electroless plating, acting as a reflective layer with low infrared emissivity (0.487) to re-reflect transmitted electromagnetic waves. This asymmetric architecture establishes an “absorption–reflection–reabsorption” attenuation pathway, yielding an EMI shielding effectiveness (SE T ) of 43.95 dB across the X-band and an A/R ratio of 3.55, which verifies an absorption-dominated shielding mechanism. Meanwhile, the nickel coating reduces surface IR emissivity, while the porous aerogel serves as a thermal insulator, lowering the equilibrium surface temperature to 44.7 °C when placed on an 80 °C heat source. This work demonstrates that a well-engineered asymmetric structural design enables the integration of absorption-dominated EMI shielding and superior IR stealth performance within a single lightweight aerogel.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）