Catalysts
·
2025
·Vol. 15
·期 12
·
IF 4
Yuanyuan Gao,Jieqiong Wang,Zhongyi Liu,Shuaihui Li,Qiaoyun Liu
Furfural (FAL), an important biomass-derived platform molecule, plays a vital role in bridging biorefineries and the production of high-value chemicals through its selective hydrogenation to furfuryl alcohol (FOL). In this work, a series of Cu-based bimetallic catalysts (Cu5Nix/SiO2) were prepared by a simple impregnation method and exhibited outstanding catalytic performance for the hydrogenation of furfural under the mild conditions. When the loading of Ni was 2 wt%, the optimal catalytic activity was obtained at 150 °C and 1 MPa H2, achieving a furfural conversion of 97.3%. This catalyst also showed excellent stability, maintaining high activity and selectivity toward FOL after five consecutive reaction cycles. Structural characterizations using X-ray diffraction (XRD), Hydrogen temperature-programmed reduction (H2-TPR), Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS) revealed strong electronic interactions between Cu and Ni species. The introduction of Ni promoted the reduction of Ni2+and improved the dispersion of Cu, which in turn increased the number of accessible active sites and facilitated the hydrogenation process. This synergistic effect between Cu and Ni provides an efficient and low-cost strategy for the selective hydrogenation of biomass-derived furfural to high-valued chemicals.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Chenjie Dong,Guansheng Li,Jiajing Zhu,Jie Cui,Liangjun Huang,Hui Wang
MgH 2 is a high-density hydrogen storage material but requires an efficient catalyst to improve its poor kinetics and reduce high operating temperature. TiO 2 is a widely used photocatalyst for water splitting and hydrogen production, and has also demonstrated catalytic ability in the gas-solid reaction of MgH 2 . In this study, we synthesize the Ni-doped TiO 2 nanoparticles, which significantly reduce the hydrogen absorption temperature down to subzero temperatures. The milled composite of MgH 2 with 10 wt% Ti(5Ni)O 2 can absorb 5.25 wt% H 2 within 30 s at 25 °C, 4.30 wt% H 2 within 50 s at 0 °C, and 3.94 wt% H 2 within 50 s even at a low temperature of −30 °C. This composite can release 6.04 wt% of hydrogen in 3 min at 250 °C, and the dehydrogenation activation energy is reduced to 74.57±1.36 kJ/mol, a notable reduction in comparison to that observed in pure MgH 2 . This study demonstrates the potential of the modified TiO 2 as an important kind of catalyst for solid-state hydrogen storage materials.
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NANOTECHNOLOGY
·
2023
·Vol. 34
·期 40
·405201
·
IF 3.5
Zhuohua Chen,Xiaoli Jin,Qing Lan,Xin Li,Qunzeng Huang,Wenmin Liu,Yuwei Guo,Haiquan Xie,Liqun Ye
Photocatalytic CO2 reduction is considered to be an appealing way of alleviating environmental pollution and energy shortages simultaneously under mild condition. However, the activity is greatly limited by the poor separation of the photogenerated carriers. Ion doping is a feasible strategy to facilitate the charge transfer. In this work, Ni-doped Bi4O5I2 photocatalyst is successfully fabricated using a one-pot hydrothermal method. A few doping levels appear in the energy band of Bi4O5I2 after Ni doping, which are used as springboards for electrons transition, thus promoting photoexcited electrons and holes separation. As a consequence, a remarkably enhanced yield of CO and CH4 (6.2 and 1.9 μmol g−1 h−1) is obtained over the optimized Bi4O5I2-Ni15, which is approximately 2.1 and 3.8 times superior to pure Bi4O5I2, respectively. This work may serve as a model for the subsequent research of Bi-based photocatalysts to implement high-performance CO2 photoreduction.
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高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Shuyan Guan,Lulu An,Yumei Chen,Xianyun Liu,Jianchao Shi,Yulong Sun,Yanping Fan,Baozhong Liu
Highly active and stable non-noble metal catalysts are expected to play a critical role in future hydrogen storage and conversion applications. The design of active sites with composite oxides provides a new approach for developing high-performance catalysts. In this study, an Fe-doped Ni/NiO nanocomposite film was constructed on an ionic liquid/water interface to promote hydrogen generation. The optimized Ni/FeNiOx-25 catalyst showed excellent catalytic activity toward ammonia borane hydrolysis, with a turnover frequency of 72.3 min–1. The enhancing effect of Fe2+ doping on Ni/NiO films was confirmed by the improved intrinsic activity and theoretical simulations. Fe ion doping stabilized NiO and prevented NiO from becoming Ni. The interfacial Ni–Fe2+ dual active sites on the FeNiOx and Ni interfaces participated in the targeted adsorption and effective activation of water and NH3BH3 molecules, respectively. The sufficiently exposed plane surface of the nanofilms provided abundant active sites for catalytic reactions. This significant advance will inspire development in the ambient liquid hydrogen storage field.
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高影响因子
Journal of Energy Chemistry
·
2019
·
IF 5.162
Jun Chen,F. Xu,L. Sun,Kexiang Zhang,Yongpeng Xia,Xiaolei Guo,Huanzhi Zhang,Fang Yu,Erhu Yan,Hongliang Peng,Pengru Huang,Shujun Qiu,Cuili Xiang,Yujie Sun
In this work, Ni-Bi-B alloy has been synthesized via chemical synthesis method . A new kind of Al-InCl 3 -(Ni-Bi-B) composite has been prepared by high energy mechanical ball grinding Al powder with additives. Results show that the doped Ni-Bi-B alloy can significantly improve the hydrogen generation performance of Al-InCl 3 and the catalytic activity is enhanced with the increasing content of Bi in Ni-Bi-B alloy. Under optimal conditions, the hydrogen generation yield and conversion yield of Al-InCl 3 -(Ni-Bi-B) reached 1196.8 mL g −1 and 100.0% at room temperature, respectively. Mechanism study shows five kinds of active sites, such as the fresh surface/defect of Al particle , Al-AlCl 3 , Al-In, Al-Bi/B and Al-Ni/B produced during the ball milling process. Their synergistic effect enhances the hydrogen generation performance of Al-InCl 3 -(Ni-Bi-B) remarkably. In general, the proposed Al-InCl 3 -(Ni-Bi-B) composite is possible to serve as hydrogen generation material for fuel cells.
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Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 47
·24767-24774
·
IF 8.867
Chenlong Dong,Xiangye Liu,Xin Wang,Xiaotao Yuan,Ziwan Xu,Wujie Dong,Muhammad Sohial Riaz,Guobao Li,Fuqiang Huang
Developing economical and stable bifunctional electrocatalysts for overall water splitting is of enormous importance for sustainable energy systems. Here, Ni/NiTiO3 with a villiform structure assembled by nanosheets is presented as an efficient bifunctional electrocatalyst. The Ni/NiTiO3 with a molar ratio of 15 : 1 (Ni : Ti) manifests remarkable catalytic performance for both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) in alkaline solutions, with onset overpotentials of 270 mV for the OER and ∼50 mV for the HER. Large amounts of Ni nanoparticles inset in the NiTiO3 nanosheets possess a high specific surface of 28.4 m2 g−1 which is far greater than that of bare Ni (7.7 m2 g−1). The results of long-term OER operation confirm that the introduction of Ti4+ is favorable for enhanced stability. When the catalyst is employed as both the cathode and anode for overall water splitting, it displays an onset potential of 1.55 V in 1 M KOH solution which can rival that of the integrated performance of Pt/C and RuO2. Hence, our Ni/NiTiO3 electrocatalysts have enormous potential for realistic large-scale water splitting.
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高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Si-Yuan Ye,Jia-Qian Wu,Bin-Bin Yu,Yi-Wei Hua,Zongsu Han,Zi-Yi He,Zheng Yan,Meng-Li Li,Yan Meng,Xuebo Cao
Basic requirements for advanced and practical supercapacitors need electrode materials with strong stability, high surface area, well-defined porosity, and enhanced capability of ion insertion and electron transfer. It is worth mentioning that the two-dimensional cluster-based Ni/Co–organic layer (Ni0.7Co0.3-CMOL) inherits high stability from the Kagóme lattice and shows excellent pseudocapacitance behavior. As an optimized atomic composition, this crystalline CMOL exhibits excellent performance and stability both in 1.0 M KOH and All-Solid-State Flexible Asymmetric Supercapacitor (ASCs). The specific capacitance values are 1211 and 394 F g–1 and the energy density is 54.67 Wh kg–1 at 1 A g–1. Good cycling stability is characterized by its capacitance retention, maintained at 92.4% after 5000 cycles in a three-electrode system and 90% after 2000 cycles at 20 A g–1 for assembled All-Solid-State Flexible ASCs. An in situ XRD technique was used in the three-electrode system, which showed that there was no signal of crystalline substance that affected the cyclic stability of the material while charging and discharging. These superior results prove that Ni0.7Co0.3-CMOL is a promising candidate for supercapacitor applications.
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JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING
·
2021
·
IF 2.269
Peng Zhou
A new material, polyacrylic acid-b-polyptyrene (PAA-b-PS) covered Ni/Fe nanoparticles (PAA-b-PS-nZVI-Ni), was developed and evaluated for the selective dechlorination of 1,1,1-trichloroethane (1,1,1-TCA) in the presence of potential interferents. The average size of the PAA-b-PS coated Fe/Ni bimetallic nanoparticles was approximately 50 nm, which resulted from agglomeration prevention by PAA-b-PS. The removal efficiency of 1,1,1-TCA by an optimal dose with a 1.0 g/L Fe/Ni (Ni/Fe = 2 wt%) and 0.5 g/L PAA-b-PS-coated concentration was higher (87.5%) than that of bare Fe/Ni (60%). The pseudo-first-order rate constant (Kobs) of 1,1,1-TCA removal by PAA-b-PS-nZVI-Ni was 0.0142 min−1 within 240 min. Comparatively, the Kobs values of 1,1,1-TCA removal by other materials (Fe, pure bimetallic Fe/Ni, PAA-b-PS-Fe) were only 0.003, 0.0052 and 0.0103 min−1, respectively. The 1,1,1-TCA removal efficacy by PAA-b-PS-nZVI-Ni showed no obvious gap regardless of pH or various common inorganic anions (NO3−, HCO3− and SO42−) at different concentrations. However, humic acid (HA) had great influence on the degradation of 1,1,1-TCA. In conclusion, PAA-b-PS-covered Ni/Fe nanoparticles with its selectivity high effectiveness could be used as one remedial agent for the degradation of 1,1,1-TCA in water.
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高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Ying Yuan,Qiao You,Shunjian Qiu,Zhiming Wang,Yunhua Chen,Chaoyang Wang,Li Zhou,Hongxia Liu
Existing electromagnetic shielding materials often suffer from issues such as high reflectivity, limited adaptability, and a lack of self-healing capabilities when they are applied. This study investigates electromagnetic shielding materials (MNWPA or MNPPA) developed by integrating MXene (Ti3C2Tx), magnetic nickel nanowires (Ni NWs), or Ni nanoparticles (Ni NPs) into a dual network hydrogel of poly(vinyl alcohol) and poly(acrylic acid). This unique network structure imparts excellent self-healing capabilities to the materials through reversible dynamic covalent, ionic, and hydrogen bonds. This grants the hydrogel robust mechanical properties even after undergoing self-healing within 1 h of damage. The incorporation of MXene and Ni not only enhances conductivity but also achieves favorable impedance matching, resulting in effective electromagnetic interference (EMI) shielding properties for the hydrogel. Notably, the observed shielding mechanism is primarily based on absorption. Interestingly, the MNWPA and MNPPA hydrogels exhibit distinct absorption and reflection losses due to the differing morphologies between Ni NW and Ni NPs. Furthermore, after cut-healing treatment, the MNWPA hydrogels show a higher retention rate of EMI shielding effectiveness (EMI SE). Conversely, after undergoing multiple stretching behaviors, the MNPPA hydrogels demonstrate a higher retention rate of EMI SE. These findings further emphasize the impact of the Ni NW and Ni NP morphologies on the EM shielding performances of the hydrogels. Additionally, the MNWPA and MNPPA hydrogels display a sensitive deformation response and can serve as strain sensors to monitor various movements of the human body. Hence, our study offers a valuable reference for exploring composite EM shielding materials incorporating Ni NW or Ni NPs.
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高影响因子
JOURNAL OF MOLECULAR CATALYSIS B-ENZYMATIC
·
2014
·
IF 2.745
Zhongjie Wu,Wei Qi,Mengfan Wang,Rongxin Su,Zhimin He
The metal ceramic powder (MCP) was used for lipase immobilization. The MCP containing Ni 2+ (Ni-MCP) exhibited the best affinity to lipase . The effects of heating rate, lipase concentration and immobilization time on immobilized lipase (Ni-MCP-lipase) activity were measured. Under the optimal preparation conditions (heating rate: 1 °C/min, lipase concentration: 9 mg/mL, immobilization time: 8 h), Ni-MCP-lipase could obtain 1.4 U/g and 216% of activity yield. The Ni-MCP-lipase, with improved thermal stability and storage stability, had optimal pH value of 6.0 and optimal temperature of 40 °C. The characterizations clarified the effect of heating rate on Ni-MCP-lipase activity, and confirmed that lipase had been efficiently immobilized on Ni-MCP surface. Finally, cinnamyl acetate synthesis demonstrated that Ni-MCP-lipase had improved efficiency compared with free lipase. Under the optimal reaction conditions (Ni-MCP-lipase loading: 3 g; reaction temperature: 35 °C; acetic acid/cinnamyl alcohol: 2:1 in 15.0 mL reaction system), the cinnamyl acetate yield would reach 62.56%.
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高影响因子
APPLIED ENERGY
·
2017
·
IF 7.182
Xinghua Zhang,Wenwu Tang,Qi Zhang,Tiejun Wang,Longlong Ma
Ni-based catalysts supported on γ-Al 2 O 3 and SiO 2 were prepared by impregnation. Catalyst characterization was performed using XRD, NH 3 -TPD, H 2 -TPR and chemisorption. Effects of supports on catalytic performance were tested using the hydrodeoxygenation (HDO) of phenolic compounds as a model reaction. Experiment result shows that single phenolic compounds can be converted via HDO reaction over Ni/SiO 2 and Ni/γ-Al 2 O 3 catalysts at 300 °C. The hydrocarbon yields are in the range of 60–90%. The effect of supports on the reaction mechanism was also explored. It is found that hydrogenation of the aromatic ring preferentially occurs over Ni/SiO 2 catalyst while the cleavage of C AR O bond preferentially occurs over Ni/γ-Al 2 O 3 catalyst in the HDO of phenol. Compared to Ni/γ-Al 2 O 3 catalyst, Ni/SiO 2 catalyst exhibits better repeatability and higher catalytic activity for hydrocarbon yield when mixed phenolic compounds were used as feedstock in the HDO reaction, and the carbon deposited on the surface of Ni/SiO 2 catalyst is lower.
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Small
·
2021
·Vol. 17
·期 52
·2104282
·
IF 13.281
Wei Huang,Wenjin Li,Lve Wang,He Zhu,Min Gao,Huan Zhao,Jinling Zhao,Xueling Shen,Xiaodan Wang,Ze Wang,Chuanlei Qi,Wei Xiao,Lei Yao,Jiantao Wang,Weidong Zhuang,Xueliang Sun
Ni-rich layered oxides are significantly promising cathode materials for commercial high-energy-density lithium-ion batteries. However, their major bottlenecks limiting their widespread applications are capacity fading and safety concerns caused by their inherently unstable crystal structure and highly reactive surface. Herein, surface structure and bulk charge regulation are concurrently achieved by introducing high-valence Ta 5+ ions in Ni-rich cathodes, which exhibit superior electrochemical properties and thermal stability, especially a remarkable cyclic stability with a capacity retention of 80% for up to 768 cycles at a 1C rate versus Li/Li + . Due to the partial Ta enrichment on surface, the regulated surface enables high reversibility of Li + insertion/extraction by preventing surface Ni reduction in deep charging. Moreover, bulk charge regulation that boosts charge density and its localization on oxygen remarkably suppresses microcracks and oxygen loss, which in turn prevents the fragmentation of the regulated surface and structural degradation associated with oxygen skeleton. This study highlights the significance of an integrated optimization strategy for Ni-rich cathodes and, as a case study, provides a novel and deep insights into the underlying mechanisms of high-valence ions substitution of Ni-rich layered cathodes.
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