JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Junnan Wang,Qijie Wang,Wei Wang,Pinbo Li,Yazhen Zhao,Junjian Zhai,Wu Zhao,Han Zhang,Jiangni Yun,Zhiyong Zhang,Jiangxiao Tian,Zhouhu Deng,Junfeng Yan
In this study, a unique dual-spatial three-dimensional (3D) porous structure comprising Ni/C hollow microspheres was prepared from a Ni-based metal organic framework (Ni-MOF) embedded in graphene foam (GF) by the solvothermal method followed by calcination . The graphene foam-based composite, Ni/C@GF (NCGF), exhibited a stable spatial conductive network structure and diverse porous architecture, promoting the microwave absorption (MA) properties of composites. The NCGF with a Ni/C and GF ratio of 1:2.5 displayed a reflection loss (RL) value of ─63 dB with 15 wt% loading, while the thickness is only 1.76 mm. Further, its effective absorption bandwidth (EAB) reached to 5.4 GHz at 2 mm thickness. In addition, when the RL value is less than ─20 dB, the NCGF still manifests a wider bandwidth (2.2 GHz) and a relatively low thickness (1.76 mm). In addition to the extraordinary attenuation ability, the excellent MA performance is mainly ascribed to optimized impedance matching characteristics. Moreover, multiple reflections promoted by the dual-space structure also play a significant role during the microwave absorption process.
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Ning Ma,Xiaobo Ma,Ling Ma,Xiaomeng Wang,Zhijie Cao
The high desorption temperature and sluggish kinetics of NaAlH 4 limit its applications in hydrogen storage . To address these issues, a Ni nanoparticles-loaded TiN composite catalyst with excellent thermodynamic stability and catalytic activity was constructed. The addition of 5 wt% Ni 10 @TiN reduced the initial dehydrogenation temperature of NaAlH 4 to 81 °C, and a total amount of 5.4 wt% H 2 could be released within 20 min at 170 °C. The activation energies for the two-step dehydrogenations were significantly reduced to 66.3 kJ/mol and 81.4kJ/mol, respectively, which were 43 % and 36 % lower than that of pure NaAlH 4 . Experimental results and theoretical calculations suggested that these remarkable improvements were originated from the grain refinement of NaAlH 4 and multi-fold catalytic activities of Ni 10 @TiN catalyst like providing catalytic active sites, facilitating the breaking of Al-H and H-H bonds, and increasing hydrogen diffusion channels. These findings may offer new ideas for designing high-efficiency catalysts for solid-state hydrogen storage materials.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yuanyuan Li,Jianwei Li,Zhen Zeng,Xiao Xu,Jun Cheng,Hongqiang Zhang,Jing Li,Yiwei Rao,Ying Deng,Lijie Ci,Deping Li
All-solid-state batteries (ASSBs) employing sulfide solid electrolytes (SSE) and high-nickel layered oxide cathodes have attracted considerable attention, attributed to their superior safety and great potential for high energy densities. However, the interface compatibility between SSE and nickel-rich oxide cathode remains a challenge. Here, a dual-functional strategy of Li 6.25 La 3 Zr 2 Al 0.25 O 12 surface coating and bulk Zr doping in LiNi 0.8 Co 0.1 Mn 0.1 O 2 was proposed (NCM811@CD-LLZAO), aiming to enhance the interfacial compatibility toward sulfide-based ASSBs. The fabricated ASSBs exhibit an impressive capacity retention rate of 91.1% after 100cycles at 0.1C and can sustain an ultra-long cycling performance over 1000cycles at 1.0C. Remarkably, even at a high rate of 11.0C, the battery still maintains a high capacity, highlighting its excellent rate performance. The distribution of relaxation time (DRT) analysis reveals that the LLZAO buffering layer can enhance the kinetics at the cathode/electrolyte interface. Theoretical calculation further confirms that the strong Zr-O bond formed by Zr doping can stabilize the lattice oxygen and effectively prevent the sulfide solid electrolyte from further electrochemical oxidation, thereby enhancing the interfacial dynamic and stability. These encouraging results provide a new strategy for the practical application of high-energy–density ASSBs, enabling fast charge transfer, extended cycle longevity and enhanced safety.
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Hexin Liu,Xinyu Liu,Zhenyu Wang,Lingyun Zhu,Xing Zhang
All-solid-state batteries (ASSBs) have attracted much attention in the fields of energy storage, electric vehicles, and portable electronic devices due to their safety and high energy density. Ni-rich layered ternary materials (LiNi1–y–zCoyMnzO2, 1 – y – z ≥ 0.7) are considered to be among the most promising candidates for cathode materials in ASSBs due to their unique advantages. Nevertheless, the interfacial chemical reaction between the ternary cathode (NCM) and solid-state electrolytes (SSEs) has become the main issue to limit the long-cycle stability of the cathode. Relative studies have shown that when NCM materials are in direct contact with sulfide-based SSEs, byproducts generated by the interfacial chemical reaction accumulate at the interface, resulting in increasing interfacial impedance. However, up to now, the formation mechanism of the NCM/SSE interfacial chemical reaction, as well as its properties and evolution process, still lacks detailed characterization. In this paper, batteries at different stages during the long-cycling process are characterized to reveal the dynamic evolution process of the chemical reaction from the cathode–electrolyte interface to the interior of the particle and to determine the chemical reaction effect on the irreversible degradation of the battery capacity. On this basis, a surface coating of LiNbO3 is adopted to establish a passivation protection layer at the cathode–electrolyte interface. The coated battery has been subjected to 2000 charge/discharge cycles at a rate of 1 C and achieved a capacity retention rate of up to 82%.
✓ 已验证
DOI
高影响因子
IONICS
·
2026
·
IF 3.4
Gong Gu,Liu Xiangyu,Ma Hao,Lv Du,Luo Hao,Liang Miaomiao,Zhou Yuan,Wang Haiyang,Zhao Yuzhen,Lashari Najeeb ur Rehman,Miao Zongcheng
The development of high-performance supercapacitor electrodes relies on the rational design of material structures with optimized electrochemical properties. In this work, we report a two-dimensional sponge-like NiS 2 architecture synthesized via a MOF-derived sulfurization strategy. The unique hierarchical porous structure, featuring abundant mesopores and high specific surface area, facilitates efficient ion diffusion and provides numerous electroactive sites for redox reactions. The resulting NiS 2 electrode exhibits outstanding specific capacitance (1227.5 F g − 1 at 0.5 A g − 1 ) with good cycling stability in alkaline electrolyte. Moreover, the NiS 2 electrode demonstrates bifunctionality and can be effectively employed in aqueous Ni-Zn batteries, delivering high specific capacity and stable long-term performance. This study establishes NiS 2 as a promising electrode material for aqueous energy storage devices and provides a feasible synthetic pathway for designing high-performance transition metal sulfide electrodes.
✓ 已验证
DOI
高影响因子
ChemistrySelect
·
2026
·Vol. 11
·期 37
·e74658
·
IF 2.3
Feifei Xing,Yuheng Jing,Fei Wang,Junfeng Feng,Yuwei Chen,Baining Lin,Rukuan Liu,Jianchun Jiang
Developing low-cost and sulfur-free catalysts is essential for converting waste lipids into green diesel. Herein, hydroxyapatite-supported Ni–Fe catalysts were prepared via a one-step co-precipitation strategy and evaluated for lipid hydrotreatment. The optimized 20Ni–Fe/HAP catalyst delivered 97.1% conversion and 89.1% alkane yield in fatty acid hydrotreatment at 240°C, far outperforming the impregnation-derived counterpart, which gave only 13.1% alkane yield under identical conditions. Characterization results revealed that the superior performance originated from the formation of highly dispersed Ni 3 Fe species, abundant accessible Ni active sites, enlarged surface area, and suitable acidity distribution. Increasing the Ni loading beyond 20 wt.% failed to further improve the activity because of reduced active-site accessibility and pore diffusion efficiency. The catalyst also showed excellent adaptability toward practical feedstocks, affording over 98% alkane yields from used cooking oil and acidified vegetable oil at 260°C. Moreover, 20Ni–Fe/HAP maintained stable performance during five consecutive runs, with negligible changes in conversion and C15–C18 alkane yield. This work provides an efficient Ni–Fe/HAP catalytic system for sustainable production of diesel-range alkanes from waste lipids. Graphical One-step coprecipitation creates a Ni 3 Fe catalyst supported on hydroxyapatite with abundant accessible Ni sites and suitable acidity for efficient lipid hydrotreatment. The optimized 20Ni–Fe/HAP catalyst affords high yields of diesel range alkanes under mild conditions, converts used cooking oil and acidified vegetable oil, and remains stable over five consecutive cycles without noble metals or sulfur.
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Jiaxin Li,Junhui Liang,Xin Yao,Hongming Liu,Yuhui Du,Huayu Chen,Hangning Chen,Chenhao Du,Liuqi Wang,Yincheng Li,Yuexiang Huang,Da Chen
The development of low-temperature, nonprecious metal thermocatalysts for ammonia decomposition holds significant promise for advancing the green hydrogen industry. LaNiO3 catalysts, with their perovskite structure (ABX3), are notable for enabling in situ growth of active metal Ni on reduced oxide supports during ammonia decomposition reactions (ADRs). However, unintentional in situ growth can lead to uncontrolled reactions and metal particle agglomeration. To address this, we employed a straightforward high-temperature and pressure hydrogenation pretreatment process to enhance the interaction between the active metal and the support, thereby suppressing the agglomeration of the active metal during the ADR process. Our results indicate that the hydrogenation pretreatment catalyst exhibits finer Ni metal nanoparticles, with an average size of approximately 8 nm. Under a gas hourly space velocity (GHSV) of 18,000 mL gcat–1 h–1 and at 550 °C, the NH3 conversion efficiency reaches 90%, which exhibited excellent stability over a period of 100 h. Additionally, we utilized TEM, XPS, EPR, NH3-TPD, and H2-TPR techniques to elucidate the intrinsic mechanisms related to the enhanced catalytic activity. This study addresses the issue of active metal nanoparticle agglomeration through hydrogenation pretreatment.
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Zidan Zou,Yue Shen,Chun Chen,Wenchao Li,Yunxia Zhang,Haimin Zhang,Zhixin Yu,Huijun Zhao,Guozhong Wang
For size-sensitive catalytic reaction systems, precise control of geometric size of heterogeneous transition metal catalysts, especially for non-noble metals, is in desperate need and also a great challenge. Here, highly dispersed Ni nanoparticles (NPs) anchored within mesoporous silica (MS) is fabricated through a hybrid strategy of amino-modification and vacuum-impregnation. The Ni NPs in Ni/MS catalyst can be precisely regulated from 2.2 to 12.6 nm, causing a variation in the proportion of low and high coordination sites of Ni atoms. The Ni/MS catalysts show a volcanic trend between 2-methoxy-4-methylphenol (MMP) yield and Ni geometry size in hydrodeoxygenation (HDO) of bio-derived vanillin, and the Ni/MS-4.8 catalyst with middle size (4.8 nm) shows optimal HDO performance with the highest MMP productivity of 19.5 g MMP g Ni −1 h −1 . DFT calculation demonstrates that the medium-sized Ni/MS-4.8 catalyst possesses abundant low/high coordinated Ni atoms, wherein the low coordinated Ni atoms facilitate the adsorption of H 2 and vanillin, and the high coordinated Ni atoms promote the dissociation of H 2 and activating of C═O and C─O bonds, thus displays superior performance in HDO reaction. This work paves a way in precise control of geometric size of heterogeneous catalysts applicating in size-sensitive catalysis.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124205
·
IF 7.5
Kaige Chen,Jie Li,Yongxiang Wang,Yong Dai,Yongming Luo,Xiaohua Cao,Xiaoping Xing
Photothermal conversion of CO 2 to methane offers a promising pathway for simultaneous carbon recycling and renewable energy storage. To date, Ni-based catalysts dominate CO 2 methanation. However, their low-temperature activity under photothermal conditions still requires improvement. MTiO 2 derived from Ti 3 C 2 MXene retains its two-dimensional (2D) layered structure and excellent photothermal conversion properties. Herein, we synthesized Ru-Ni@MTiO 2 catalysts through hydrothermal treatment of Ni-impregnated MTiO 2 with controlled Ru loading ( x = 1, 3 and 5 wt%). The optimal 3Ru-Ni@MTiO 2 catalyst achieved a CH 4 production rate of 86.25 mmol·g −1 ·h −1 at 300 °C, which is 1.3-fold higher than that of the Ru-free Ni@MTiO 2 counterpart. The superior catalytic performance stems from the synergistic electronic effect between Ni and Ru and their dual-site cooperation. Electron transfer from both Ru and MTiO 2 to Ni sites elevates the electron density of metallic Ni, which weakens the H-H bond and accelerates the dissociative adsorption of H 2 . Furthermore, Ru loading not only broadens the light absorption range and promotes photogenerated charge separation, but also increases the density of moderate basic sites, thus boosting CO 2 adsorption and activation. This work provides new insights into the design of bimetallic photothermal catalysts for CO 2 methanation.
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2026
·
IF 4.3
Ijaz Hussain,Saheed A. Ganiyu,Ivan Kozhevnikov,Khalid R. Alhooshani
We synthesized a highly efficient Ni/CeO 2 -B catalyst with a unique Haystack-like morphology for DRM. • The haystack-like morphology of CeO 2 is responsible for enhanced oxygen mobility, Ni dispersion, and strong metal-support interactions. • The Ni/CeO 2 -B catalyst demonstrated remarkable CH 4 and CO 2 conversion rates. • The prepared catalyst maintained stable performance over 40 h of continuous operation. In this study, a unique Ni-based CeO 2 catalyst (Ni/CeO 2 -B) of haystack-like morphology was prepared for dry reforming of methane (DRM). The physicochemical properties of the synthesised catalysts were examined by FTIR, SEM, TEM, XRD, Raman spectra, XPS, BET, CO 2 -TPD, O 2 -TPO, ESR, TGA/DSC, and in situ DRIFT spectroscopy. The Ni/CeO₂-B catalyst exhibited a unique haystack-like morphology, resulting in high surface area, enhanced surface basicity, abundant oxygen vacancies, and improved Ni dispersion. The Ni/CeO₂-B catalyst exhibited excellent CO₂ and CH₄ conversions of 78% and 95%, respectively, at 800 °C, as well as excellent thermal stability for 40 h of operation. The Ni/CeO₂-B catalyst exhibited a high concentration of oxygen vacancies and enhanced basicity, which provide additional active sites for the adsorption and activation of CO₂ and CH₄ during the DRM. In situ DRIFTS spectra in combination with XPS, ESR, and catalytic results suggest that the redox-active Ni/CeO₂-B catalyst promotes CO₂ activation and improves anti-coking during DRM activity. In order to facilitate the scale-up of DRM technology, this study offers insightful information for the synthesis of advanced catalytic materials to improve syngas formation. Download: Download high-res image (420KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Huiwen Zhang,Xia Zhang,Yue Ma,Yingnan Zhao,Rui-Qi Yao,Xinying Sun,Tonghui Wang,Beibei Xiao,Gao-Feng Han,Xing-You Lang,Qing Jiang
Cyanide-free electrosynthesis converts amino acids to nitriles with >90% FE. • Low-coordinated Ni sites promote NiOOH formation for decarboxylation–dehydrogenation. • Carbon radicals induce nitrogen lone-pair delocalization, facilitating N H cleavage. • Broad amino acid scope includes challenging aromatic substrates. Leveraging biomass for organic nitrogen synthesis can reduce dependency on fossil ammonia, streamline synthetic pathways, and decrease carbon footprint and contamination. However, the conversion is chemically disfavored owing to the competition with deamination, overoxidation, and crosslink. Herein, we report a novel electrochemical synthesis route for biomass-derived amino acid oxidation, using L-alanine as the representative example to produce acetonitrile with high selectivity in the electrolyte. Upon dynamic reconstruction, defect-rich NiO anchored on O-doped carbon interacts with carboxylate groups, thereby facilitating decarboxylation. The resulting carbon radical induces partial delocalization of the nitrogen lone pair electrons, which weakens the N H bond, ultimately promoting nitrile production. The optimized electrocatalyst delivers a Faradaic efficiency of up to 92.2% together with a high acetonitrile production rate of 580.1 mmol g cat −1 h −1 and excellent stability. Moreover, our strategy has proven to be applicable to multiple α-amino acids. This work reveals the fundamental mechanism of amino acid electrooxidation to nitriles and paves the way for green and sustainable nitrogen utilization. An electrochemical strategy to convert biomass-derived amino acids into value-added nitriles using low-coordinated Ni catalysts. The process initiates decarboxylation to generate carbon-centered radical, which reorganize the local C N bonding environment and lower the barrier for C N bond formation, providing a sustainable and cyanide-free route for nitrogen valorization from renewable feedstocks. Download: Download high-res image (72KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2026
·Vol. 156
·期 9
·242
·
IF 2.5
Shi Guopu,Shi Fangxu,Liang Fuxin,Wei Yulin,Li Yuanguang,Han Yubing,Wu Junyan,Huang Sai,Wang Honglei,Ji Jun,Wu Chao
Ethyl 3-piperidine-carboxylate is an important intermediate in the pharmaceutical field. To break through the limitations of poor mechanical strength and thermal stability of catalysts and low catalytic efficiency of foam ceramic carriers due to the lack of active sites in traditional synthesis, this study used the hydrogenation synthesis of ethyl nicotinate to produce this intermediate as the probe reaction. Pd-Ni/Ru-Al 2 O 3 -SiO 2 foam ceramic catalysts were prepared by the sol-gel method and the impregnation method. Relying on the bimetallic differentiated synergistic effect of Ni, Ru, and Pd, the above technical bottlenecks were overcome. A variety of characterization techniques reveal its core mechanism of action: Pd serves as the catalytic core, and Ni can optimize the electronic structure, enabling the Pd-Ni alloy to obtain the optimal d-band center and adsorption energy, laying an electronic foundation for efficient catalysis. Ru can precisely control the particle size of Pd-Ru alloy, which is 4.5 nm smaller than that of single-metal Pd, significantly improving the metal dispersion and the utilization rate of active sites. The three-dimensional network structure of foam ceramics enhances mass transfer efficiency. The γ-Al 2 O 3 -SiO 2 coating provides abundant active sites and excellent stability. The catalytic performance of this system has been significantly enhanced. Among them, the yield of the corresponding product of the Pd-Ni bimetallic catalyst reached 92.57%, and it still remained above 80% after five cycles of use, providing new prospects for the green and efficient synthesis of ethyl 3-piperidine-carboxylic acid esters and the development of low-cost hydrogenation catalysts. Graphical
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）