Journal of Energy Storage
·
2025
·
IF 9.8
Gang Li,Ye Jin,Zhongjia Dai,Rui Jiang,Jinyu Zheng
The high nickel stoichiometry in Li[Ni 0.8 Co 0.1 Mn 0.1 ]O 2 (NCM811) cathode materials, while advantageous for specific capacity enhancement, introduces concomitant challenges including (i) surface instability due to high surface residual Li compounds (RLCs) content, and (ii) accelerated structural degradation and deleterious phase transitions during electrochemical cycling. To address these challenges, NCM811 was treated with an aqueous solution of ammonium niobium oxalate, which not only reduced the RLCs content on the surface, but also in-situ constructed a LiNbO 3 coating layer on the surface of the NCM811 materials after the re-calcination process. Within a potential range of 2.75–4.3 V at 0.5C and 25 °C, the Nb-modified NCM811 materials exhibit the advantages of improved specific capacity of 215.3 mAh g −1 and excellent capacity retention of 92.3 % after 200 cycles. This integrated approach synergistically combines wet coating with re-calcination treatment to achieve dual modification of NCM811 cathodes-simultaneously reducing RLCs while enabling in-situ construction of a lattice-doped LiNbO 3 coating layer, demonstrating exceptional potential for scalable industrial implementation through its combined performance enhancement and process compatibility.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Wenyao Duan,Siwei Liu,Chunhao Wang,Guangmei Cao,Chunyun Hu,Xia Jiang
Green hydrogen production from biomass via gasification process is an emerging and widely concerned technology. However, tar as a byproduct of the gasification process can clog and corrode gasification equipment, thereby reducing gasification efficiency. While steam reforming technology can efficiently convert tar into H 2 , the catalyst deactivation remains a significant challenge. This research synthesized novel NiAl catalysts by one-pot evaporation-induced self-assembly (EISA) method for converting tar into H 2 . The results revealed that the 2.4-NiAl-7 catalyst was the most active, achieving a toluene conversion rate of 99.9 %, a hydrogen yield of 181.2 mmol/g toluene at 750 °C, and demonstrating excellent resistance to carbon deposition and long-term stability with a steam/carbon(S/C) ratio of 3. A series of characterizations confirmed that moderate metal-support interaction was crucial because of the confinement effect (embedding Ni nanoparticles into the mesopore) and the unique NiAl spinel structure. Additionally, the SRT performance (gas yields) was found to be positively correlated with the degree of Ni dispersion. This research reveals new insights in designing a catalyst for long-term practical applications in the conversion of tar into H 2 during steam reforming.
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高影响因子
Fuels
·
2025
·Vol. 6
·期 4
·76
·
IF 2.8
Jun Hu,Hongyang Yu,Yanan Wang
The chemical looping steam reforming of methane (CLSR) employing Fe-containing oxygen carriers can produce syngas and hydrogen simultaneously. However, Fe-based oxygen carriers exhibit low CH4activation ability and cyclic stability. In this work, oxygen carriers with fixed Fe content and different Fe/Ni ratios were synthesized by the sol–gel method to investigate the effects of Ni-Fe-Al interactions on CLSR performance. Ni-Fe-Al interactions promote the growth of the spinel structure and regulate both the catalytic sites and the available lattice oxygen, resulting in the CH4conversion and CO selectivity being maintained at 96–98% and above 98% for the most promising oxygen carrier, with an Fe2O3content of 20 wt% and Fe/Ni molar ratio of 10. The surface, phase, and particle size were kept the same over 90 cycles, leading to high stability. During the CLSR cycles, conversion from Fe3+to Fe2+/Fe0occurs, along with transformation between Ni2+in NiAl2O4and Ni0. Overall, the results demonstrate the feasibility of using spinel containing earth-abundant elements in CLSR and the importance of cooperation between oxygen release and CH4activation.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ruyang Song,Jinghong Wen,Hongji Liu,Wenjing Song,Chuanyue Sun,Bo Wang,Shuo Tao,Abdullah N. Alodhayb,Jinsheng Zhao,Zhou Chen,Xiaodong Yi,Yunyun Dong
The conversion of CO 2 to CO via the reverse water-gas shift (RWGS) reaction is crucial for CO 2 hydrogenation. However, conventional thermal catalysis relies heavily on fossil fuels and fails to achieve carbon neutrality. Photothermal catalysis offers a promising alternative pathway for efficient CO 2 conversion. Yet, enhancing CO 2 adsorption and activation for high activity and selectivity remains a challenge in RWGS reactions. In this article, a series of Ni supported catalysts (Ni/MgO -x , where x = 1.2, 2.4, and 3.6) with abundant oxygen vacancies (Ovs) were prepared using a simple combustion method with magnesium acetate (Mg(CH 3 COO) 2 ) and urea as precursors. The results indicate that Ni/MgO -x catalysts with higher Ovs concentrations exhibit enhanced efficiency compared to Ni/MgO catalysts. The optimized catalyst achieved a high CO yield rate (12 mmol g −1 h −1 ), which was 36 times greater than that of the control catalyst under 1 W cm −1 lamp irradiation at 300 °C. Detailed characterization and density functional theory (DFT) results revealed an HCOO* reaction pathway and demonstrated the role of excess Ovs in CO 2 adsorption, activation, and reduction of the RWGS reaction activation energy. This research explores novel approaches for RWGS based on MgO supports for efficient CO 2 adsorption and activation, coupled with low-temperature synergistic photothermal effects.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Fang-Qing Zou,Ye Xiao,Chuan-Jin Tian,Yu-Min Liu,Wen-Yan Zhao,Chang-An Wang
Reasonably designing and optimizing the homogenous surfaces of catalysts with moderate noble metal loadings to enhance their electrolysis of water performance in alkaline environments has always been a challenge. In this work, we proposed a heterostructure induction technique employing Ru nanoparticles, Ni, and NiO to accurately produce a highly distributed three-phase heterostructure Ru@Ni/NiO, which exhibits excellent catalytic performance for oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and overall water splitting reaction under alkaline conditions. The OER overpotentials in 1 M KOH were 250 mV, 320 mA, and 350 mV at 10 mA cm −2 , 50 mA cm −2 , and 100 mA cm −2 current densities, respectively, outperforming RuO 2 . The HER overpotentials were 52 mV, 107 mV, and 142 mV, respectively, superior to Pt/C. In the overall water splitting reaction, the Ru@Ni/NiO system requires only 1.63 V, 1.94 V and 2.08 V to achieve current densities of 10 mA cm −2 , 50 mA cm −2 and 100 mA cm −2 , respectively. Meanwhile, the catalyst exhibited excellent stability at high current density. This study provides a design strategy for the precise construction of interfacial engineering and demonstrates significant potential for large-scale hydrogen production via electrochemical water splitting.
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Nanomaterials
·
2026
·Vol. 16
·期 3
·183
·
IF 4.3
Linjie Xie,Huiqi Sun,Jiawei Dou,Juncheng Jiang,Chen Liang
High-energy Ni-rich layered cathodes are critical for next-generation lithium-ion batteries yet remain limited by severe interfacial degradation and thermal vulnerability under high-voltage operation. In this work, a robust spinel-layered heterostructure is constructed by encapsulating LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) with a LiNi 0.5 Mn 1.5 O 4 (LNMO) spinel shell via a scalable sol–gel route. Structural characterizations confirm that the coating maintains the secondary-particle architecture, while X-ray photoelectron spectroscopy reveals a chemically reconditioned interface, achieved by the scavenging residual lithium species and suppressing of rock-salt-like surface reconstruction. Consequently, the optimized 4 wt% LNMO@NCM811 electrode demonstrates significantly enhanced high-voltage (2.8–4.4 V) stability, maintaining 41.84% of its initial capacity after 200 cycles compared to only 15.75% for the pristine sample. Crucially, thermogravimetric-differential scanning calorimetry (TG-DSC) uncovers the kinetic origin of this safety improvement: the spinel shell alters the thermal decomposition pathway, delaying the 10% mass loss temperature (T 10% ) from 515.2 °C to 716.6 °C and suppressing the total exothermic heat release from 208.3 J g −1 to 81.5 J g −1 . Collectively, these results demonstrate that the co-free spinel encapsulation is a dual-functional strategy to simultaneously stabilize surficial chemistry and intrinsically enhance the thermal safety of Ni-rich cathodes for carbon-neutral energy storage applications.
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PubMed
高影响因子
ACS Applied Energy Materials
·
2026
·
IF 5.5
Jingqi Che,Lingying Chen,Mengran Li,Rui Shi,Jiguang Zhang,Yana Liu,Jun Wang,Yunfeng Zhu
Catalytic doping is considered one of the most efficient strategies to achieve superior performance of MgH2, as rationally designed catalytic components can exhibit synergistic effects, thereby optimizing the kinetic pathways. In this study, the hydrothermal method was adopted to prepare clustered Ni–Mo–S catalysts, which were used to modify MgH2 to enhance its kinetic performance. Experimental results demonstrate that the molar proportion of Ni to Mo significantly impacts the modification effect of Ni–Mo–S catalysts on MgH2. Furthermore, the catalyst whose molar ratio of Ni/Mo is 7:2 achieves the optimal catalytic efficiency. Specifically, at 125 °C, MgH2-5 wt % Ni–Mo–S can absorb 4.61 wt % H2 in 1200 s. At a relatively low temperature of 250 °C, it manifests a rapid dehydrogenation rate and releases 5.81 wt % H2 in 2000 s. The hydrogenation (41.98 kJ/mol) and dehydrogenation (86.41 kJ/mol) activation energies of MgH2-5 wt % Ni–Mo–S are reduced by 48.87 and 43.79% compared to as-milled MgH2, respectively. Mechanism analysis suggests that this improvement may be ascribed to the following reasons: (1) The hydrogen pump effect of Mg2Ni/Mg2NiH4 facilitates the hydrogen diffusion; (2) electron transfer between Mo species with different valence states weakens the Mg–H bonds; (3) the in situ formed MgS serves as diffusion channels for hydrogen atoms, expediting hydrogen transport. This work provides a valuable outlook for constructing highly active catalysts for MgH2 hydrogen storage.
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高影响因子
CERAMICS INTERNATIONAL
·
2019
·Vol. 45
·期 8
·10028-10034
·
IF 3.45
Dengwei Hu,Fan Zhao,Lei Miao,Zhen Zhang,Yan Wang,Hualei Cheng,Yinfeng Han,Meijuan Tian,Hongxi Gu,Rong Ma
The present work investigated the effect of the addition of V 2 O 5 and MnCO 3 on the microstructure and magnetic properties of Ni-Zn ferrite ceramic samples prepared by a conventional ceramic sintering method at different temperatures. With this aim, a series of samples were prepared by varying the loadings of V 2 O 5 -MnCO 3 (un-doped, 0.4–0.1 wt%, 0.1–0.4 wt%, 0.2–0.3 wt%, 0.3–0.2 wt%, and 0.5–0.1 wt%, denoted as sample 1, sample 2, sample 3, sample 4, sample 5, and sample 6, respectively). The initial permeability and power loss of the different Ni-Zn ferrites were investigated with respect to the sintering temperature . The V 2 O 5 and MnCO 3 dopants significantly improved the initial permeability and power loss characteristics of the Ni-Zn ferrite at frequencies ≥0.5 MHz. When sintered at 1100 °C, sample 2 showed a maximum initial permeability of 931.23 H/m at a frequency of 1 MHz combined with a minimum power loss of 339.2 kW/m 3 . Co-doping with V 2 O 5 and MnCO 3 also resulted in the sintered samples with larger average grain sizes and higher density, while the sintering temperature of Ni-Zn ferrites was significantly reduced.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yanshuai Yuan,Lei Wang,Qiangchao Sun,Wei Nie,Linhui Chang,Shuangqiang Chen,Hongwei Cheng
Nickel-rich layered oxides are considered one of the most promising cathode materials for efficient lithium-ion batteries due to their high energy density and reasonable cost. However, at high cut-off voltage, the interfacial instability and structural degradation lead to severe capacity attenuation and poor thermal stability, which greatly hinder their large-scale applications. Herein, a multifunctional antispinel NiFe 2 O 4 coated LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM@NFO) material is in-situ induced by co-precipitation and subsequent sintering, boosting the cycling stability of Ni-rich materials. Coupling in-depth characterizations ( in-situ X-ray diffraction, etc.) with density functional theory calculations, the versatility of the NFO coating has been revealed. Including suppressing the transition metal dissolution, preventing the unwanted phase transition, inhibiting the oxygen vacancy generation, and stabilizing the crystal structure of the NCM by forming an M-O-N bonding network. More importantly, attributing to the high ion/electron conductivity of the NFO layer, the Li + transport kinetics between NCM@NFO particles have been facilitated. Benefitting from the collaborative effect of the protective NFO coating, the optimized 2 wt% NFO@NCM (NCM@NFO-2) sample achieves higher capacity retention (81.25 vs 67.88% after 200 cycles) at high voltages (2.75 ∼ 4.5 [email protected] ) and more excellent rate capabilities (109.86 vs 49.52 mAh·g −1 at 10C), as well as impressive capacity retention of 81.72% after 100 cycles (at 60 °C@1C). Constructing a versatile bimetallic oxide protective layer at the secondary particle surface of layered oxides provides an effective strategy for Ni-rich cathodes towards high-energy, long-duration, and safe lithium ion batteries.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Ruxia Song,Shihong Zhang,Yi He,Teng He,Hongjie Li,Bo Liu,Zhifei Zhang,Yahui He
A new type of Ni-Cu/Si 3 N 4 nanocomposites was prepared by pulse electrodeposition technology, which can be used for corrosion protection in seawater environment. XRD , SEM, AFM, EDS and XPS were used to study the structure, morphology, and surface composition of the deposited layers. The hardness and anti-corrosion performance of the deposits were evaluated using a microhardness tester and an electrochemical workstation. Meanwhile, the samples were characterized by EIS , SEM, EDS and XPS after immersion in simulated seawater for 7 days, 14 days, and 28 days. The results show that the average crystallite size of the nanocomposite with face-centered cubic structure is 13.2 nm, and has a dense granular nodular structure without obvious defects. EDS and XPS demonstrated the successful embedding of Si 3 N 4 nanoparticles with uniform distribution in the coating. Besides, it was found that embedding Si 3 N 4 particles in Ni-Cu alloy coatings can significantly strengthen the microhardness and anti-corrosion performance of the material. Furthermore, the Ni-Cu-Si 3 N 4 (0.7 g·L −1 ) nanocomposite exhibited excellent corrosion resistance even after immersion in simulated seawater medium for 28 days.
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高影响因子
CATALYSIS COMMUNICATIONS
·
2013
·
IF 2.915
Songbai Qiu,Xue Zhang,Qiying Liu,Tiejun Wang,Qi Zhang,Longlong Ma
A simple method for preparing highly active and dispersed supported metal catalysts was developed by co-impregnation. Compared with conventional wetness impregnation, addition of moderate ethylene glycol into the metal nitrate aqueous solution could enhance interaction with MCM-41 surface, resulting in formation of very small NiO particle size (3.5 nm) and high dispersion of the active phase. The Ni/MCM-41 catalysts using co-impregnation exhibited excellent catalytic performance for low temperature hydrogenation of naphthalene with 100% conversion at 55 °C, which could rival the activity of commercial Raney Ni catalyst. The obtained catalysts were characterized by XRD, TEM, TG-DSC, FT-IR, BET and TPR.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2014
·Vol. 40
·期 1
·488-500
·
IF 2.93
Donghong Duan,Jianwei Liang,Huihong Liu,Xiu You,Huikai Wei,Guoqiang Wei,Shibin Liu
Carbon-supported Ni–Au nanoparticles with a core–shell structure (Ni@Au/C) are prepared by a combination of reverse microemulsion and two-step reduction. The prepared Ni@Au/C nanoparticles are used as anode electrocatalysts in direct borohydride-hydrogen peroxide fuel cells (DBHFCs). The physical and electrochemical properties of the as-prepared catalysts are investigated using transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), cyclic voltammetry (CV), linear sweep voltammetry (LSV), electrochemical quartz crystal microbalance (EQCM), chronoamperometry (CA), chronopotentiometry (CP) and fuel cell test. The average size of the particles are approximately 10 nm. Among the resultant catalysts obtained in this study, the Ni 1 @Au 1 /C catalyst exhibits the highest catalytic activity for the direct electro-oxidation of borohydride . DBHFCs fabricated using Ni 1 @Au 1 /C as an anode catalyst and Pt mesh (1 cm × 1 cm) as a cathode electrode achieves a maximum power density of 74 mW cm −2 with a discharge current density of 130 mA cm −2 at 20 °C.
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高影响因子
危险品化学品经营许可证（带存储）