Catalysts
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2025
·Vol. 15
·期 12
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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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BIOMASS & BIOENERGY
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2025
·
IF 5.8
Zhuo Wang,Bingshuo Li,Giuseppe Pipitone,Tianhua Yang,Jian Wang,Rundong Li
A significant amount of solid residue (SR) and aqueous phase (AP) by-products are typically generated during the hydrothermal liquefaction (HTL) of lignocellulosic biomass. AP often contains substantial quantities of harmful organic matter, which can cause environmental pollution if not adequately treated. Conversely, SR can be utilized as a low-grade solid fuel. Realizing the high-value utilization of this type of by-product not only contributes to mitigating environmental pollution but also improves the overall efficiency of biomass conversion and utilization. The objective of this paper is to valorize AP and SR to produce H 2 . SR obtained from the HTL of corn stalks was converted into activated biochar (AC) to prepare a Ni/AC catalyst for H 2 production from AP through aqueous phase reforming (APR). Through CO 2 activation, the specific surface area of AC reached 691 m 2 /g at an activation temperature of 900 °C and a residence time of 3 h. Using 6 wt% Ni/AC (1/60 g catalyst /mL AP ), H 2 yield reached 17.12 μmol/COD at 320 °C over 3 h, approximately 6-fold of the non-catalyzed reaction, while the COD removal reached approximately 38 %. In the gaseous product, the composition of H 2 , CO, CH 4 , CO 2 was 31.69, 1.51, 0.67 and 66.13 vol%, respectively. In view of the adverse effect of the high COD value of AP on APR, reducing ketones, acetylenes and esters may improve the hydrogen production efficiency of the reaction system. Valorization of SR and AP for H 2 production contributes to enhancing the overall energy conversion of biomass HTL.
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MATERIALS RESEARCH BULLETIN
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2025
·
IF 5.7
Xinqi Zhang,Bingxin Wang,Dawu Shu,Wanxin Li,Fangfang An,yueyong Dong
Dyeing wastewater, a common type of wastewater in the textile industry, has a complex composition, deep color, and poor degradability. In this work, hydrothermal method was employed to synthesize Ni@MXene catalysts, and their performance in the Ni@MXene/PMS (peroxymonosulfate) system was investigated. A mixed system containing 7.5 g/L PMS and 0.2 g/L Ni@MXene was stirred for 60 min at 25 °C and pH 6, achieving a degradation percentage of 93.66%, ‧OH are the primary active species in this catalytic system, and the anion has minimal interference with the degradation process. The degradation percentage of the Ni@MXene catalyst can still reach 88.23 % after 3 times of recycling, and the degraded dyeing wastewater can be used for dyeing cotton fabrics. In conclusion, the catalyst demonstrates exhibits significant potential for dye degradation and wastewater recycling, providing valuable insights for energy conservation and emission reduction.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Hengrui Li,Yuchen Niu,Weiyue Hu,Zihao Tao,Yi Qin,Ruiqing Yao,Wenhong Li,Liuyi Pan,Hedan Yao,Dong Li
The highly selective semi-hydrogenation of acetylene in ethylene-rich streams is essential for polyethylene production. However, environmentally friendly non-precious metal catalysts are often limited by the difficulty of balancing activity and selectivity. This study employed a facile in-situ pyrolysis strategy of MOFs to successfully prepare a Ni/ [email protected] heterojunction catalyst. This catalyst exhibited outstanding performance in acetylene semi-hydrogenation, achieving an acetylene conversion of 96.16 % and ethylene selectivity of 87.22 %. Mechanistic studies revealed that its superior performance originates from highly dispersed H 2 activation sites and a unique interfacial synergistic effect. On the one hand, the strong interfacial interaction formed between Ni and ZnO not only significantly enhances the dispersion and air stability of the active Ni 0 species but also effectively promotes the activation and dissociation of H 2 molecules. On the other hand, the electron reconstruction induced by the Ni/ZnO interface significantly reduces the energy barrier of the rate-determining step promotes the rapid desorbed of the product ethylene, and inhibits excessive hydrogenation. This work provides a novel heterojunction engineering strategy for designing highly efficient, stable, and sustainable non-noble metal selective hydrogenation catalysts.
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2025
·Vol. 131
·期 6
·504
·
IF 2.8
Zheng Xiuxin,Gong Lin,Zou Zhengguang,Xie Zhuojia
In this paper, La 0.7 Sr 0.15 Ca 0.15 Mn 0.95 A 0.05 O 3 (A = Fe, Co and Ni) were fabricated via the sol–gel (S-G) approach. The samples are all rhombohedral structure shapes and belong to the trigonal space group R-3c, as shown by XRD. ZEISS Gemini SEM 300 scans showed irregular sub-micron particles with decreasing particle size for La 0.7 Sr 0.15 Ca 0.15 Mn 0.95 A 0.05 O 3 (A = Fe, Co and Ni). The magnetic properties were characterized utilizing an MPMS, and the magnetocaloric effects (MCE) were further investigated. The investigations of La 0.7 Sr 0.15 Ca 0.15 Mn 0.95 A 0.05 O 3 (A = Fe, Co and Ni) found that their Curie temperatures (Tc) were 289.5 K, 290.2 K, and 300 K, respectively. The maximum magnetic entropy change ( \(-\Delta {S}_{M}^{max}\) ) for La 0.7 Sr 0.15 Ca 0.15 Mn 0.95 A 0.05 O 3 (A = Fe, Co and Ni) at 5 T is 5.107 J/(kg∙K), 4.177 J/(kg∙K) and 3.852 J/(kg∙K), and the relative cooling power ( RCP ) is 264.819 J/kg, 275.3409 J/kg and 288.7435 J/kg. The Arrott curve, normalization and Curie–Weiss law (CW) fit together to determine that the second-order ferromagnetic-to-paramagnetic (FM-to-PM) transition is observed in the three samples, along with a small magnetic hysteresis and thermal hysteresis, the super-exchange interactions (SE) and the double-exchange interactions (DE) competed with each other to increase half peak width and RCP , with La 0.7 Sr 0.15 Ca 0.15 Mn 0.95 A 0.05 O 3 (A = Ni) having the largest RCP . While conventional low-temperature magnetic materials need to work in a liquid helium environment, room-temperature magnetic materials do not need to rely on extreme cooling conditions, which greatly reduces the cost of refrigeration equipment, and thus room-temperature magnetically cooled materials have a greater potential for research and development. In this paper, Ni is used as the doping element, and its RCP can reach 288.7435 J/kg, and its Tc is close to room temperature, so it is possible to be used as a room-temperature magnetic cooling material.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2014
·
IF 2.93
Ying Wang,Li Wang,Ning Gan,Zi-Yian Lim,Chunzheng Wu,Jun Peng,Wei Guo Wang
Ni/ x Y 2 O 3 –Al 2 O 3 ( x = 5, 10, 15, 20 wt%) catalysts were prepared by sequential impregnation synthesis. The catalytic performance for the autothermal reforming of methane was evaluated and compared with Ni/γ-Al 2 O 3 catalyst. The physicochemical properties of catalysts were characterized by X-ray diffraction (XRD), Transmission electron microscope (TEM), X-Ray Photoelectron Spectrometer (XPS), Thermo Gravimetric Analyzer (TGA) and H 2 -temperature programmed reduction techniques (TPR). The decrease of nickel particle size and the change of reducibility were found with Y modification. The CH 4 conversion increased with elevating levels of Y 2 O 3 from 5% to 10%, then decreased with Y content from 10% to 20%. Ni/ x Y 2 O 3 –Al 2 O 3 catalysts maintained high activity after 24 h on stream, while Ni/Al 2 O 3 had a significant deactivation. The characterization of spent catalysts indicated that the addition of Y retarded Ni sintering and decreased the amount of coke.
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TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
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2021
·
IF 2.917
Shi-jie LU,Yang LIU,Zhen-jiang HE,Yun-jiao LI,Jun-chao ZHENG,Jing MAO,Ke-hua DAI
Single-crystal Ni-rich cathode material LiNi 0.88 Co 0.09 Al 0.03 O 2 (SC) was synthesized by a high-temperature solid-state calcination method. Physicochemical properties of primary and delithiated SC samples were investigated by X-ray diffractometry, X-ray photoelectron spectroscopy, and transmission electron microscopy. Electrochemical performance was characterized by long-term cycling, cyclic voltammetry, and in-situ impedance spectroscopy. The results indicated that high temperature rendered layered oxides to lose lithium/oxygen in the interior and exterior, and induced cationic disordering. Besides, the solid-phase synthesis process promoted phase transformation for electrode materials, causing the coexisting multi-phase in a single particle. High temperature can foster the growth of single particles, but it caused unstable structure of layered phase.
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Science of Advanced Materials
·
2016
·Vol. 8
·期 7
·1478-1483
·
IF 1.812
Chai Yong-Ming,Shang Xiao,Han Guan-Qun,Dong Bin,Hu Wen-Hui,Liu Yan-Ru,Li Xiao,Liu Chen-Guang
A simple sol–gel thermolysis method has been utilized to prepare plate-like Ni3N films supported on nickel foam (Ni3N/NF) as electrocatalysts for oxygen evolution reaction (OER). The as-prepared samples have been characterized by X-ray diffraction (XRD),
scanning electron microscopy (SEM) and X-ray photoelectron spectra (XPS). XRD shows a typically crystal phase of Ni3N on nickel foam. The broad peak of (100) suggests smaller particle size of Ni3N on NF. SEM images confirm that Ni3N films cover on the surface
of NF. Ni3N films are composed of many uniform nanoparticles, implying larger surface area and more exposed active sites. Electrochemical measurements show that Ni3N/NF exhibits superior OER activity with excellent stability, which can be attributed to more active sites
and the enhanced conductivity derived from NF as support. Ni3N/NF as electrocatalysts for OER may provide novel idea for preparing highly active electrocatalysts from non-noble metallic nitrides.
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Materials Today Chemistry
·
2022
·
IF 7.613
J.C. Luo,J.F. Luo,C.-L. Chen,W.-H. Huang,C.-K. Chang,Y.-C. Chuang,J.L. Zhang,R.R. Zhao
Despite the high efficiency of trace dopants for better performance in layered cathodes, the structural origin of such improvement, beyond a simple replacement at the specific crystallographic site, has been rarely explored. Here we present comprehensive characterizations and analyses of structural modulations associated with trace amounts of Zr dopants in LiNi 0·9 Co 0·1 O 2 using synchrotron X-ray diffraction and X-ray absorption spectra , together with electrochemical techniques . The Zr 4+ dopant preferentially replaces the Co 3+ at the Ni/Co (3 a ) site and has a limited effect on the Ni/Li mixing. Rather than the expected compression on neighbouring octahedra , the larger Zr 4+ leads to the relaxation of Ni–O bonds and thus reduces the Jahn-Teller effect and charge excitation. The local structure of the inactive Zr also relaxes to alleviate the distortion of octahedral Ni during cycling for extended durability. This work reveals the critical role of bond relaxation and illustrates how cationic dopants tune them via structural modulations, enabling excellent electrochemical performance for an efficient method to develop high-performance layered cathodes.
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ELECTROCHIMICA ACTA
·
2013
·
IF 3.777
Zonghua Pu,Qian Liu,Abdullah H. Qusti,Abdullah M. Asiri,Abdulrahman O. Al-Youbi,Xuping Sun
The present communication reports on the first electrodeposition of Ni(OH) 2 on ZnO array supported on Ni foam. When applied as a binder-free electrode material for pseudocapacitive energy storage, the resulting ZnO@Ni(OH) 2 array exhibits a high specific capacitance of 2028 F g −1 at a current density of 10 A g −1 with good cycling stability. Meanwhile, the array exhibits a superb rate capability. Even at an extremely high current density of 100 A g −1 , the array still shows a very high specific capacitance of 1059 F g −1 .
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ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Dengke Zhang,Yan Liu,Lei Wu,Liwei Feng,Shuangling Jin,Rui Zhang,Minglin Jin
The effects of various Ti concentrations doping on the electrochemical properties of LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM 811) sample were systematically studied. The XRD , EDS and XPS analyses indicated that the Ti-ion was substituted the occupied sites of Li and transition metal on the crystal structure. It also led to the increase of lithium interlayer spacing and the decrease of transition metal interlayer slab. The secondary particle size distribution of the 0.005 mol Ti-doped in LiNi 0.8 Co 0.1 Mn 0.1 O 2 approximated to normal distribution . It showed multi-layer performance with high capacity (214.9 mAh g −1 at 0.1C), good rate performance (165.02 mAh g −1 at 1 C, 136.9 mAh g −1 at 5 C) and more excellent cyclic stability (77.01% after 150 t h at 1 C and 86.54% after 50 t h at 5 C). TEM studies revealed that the structural degradation on NCM 811 primary nano-particle could be effectively suppressed by the effect of Ti ions doped. The results demonstrated that doping of Ti content had superior advantages for LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathodes.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Jing Lin,Zhanyi Cao,Lianshan Sun,Fei Liang,Limin Wang
Ti 1.4 V 0.6 Ni + x LiAlH 4 ( x = 0.5, 1, 1.5, 2, 2.5, wt.%) composites were prepared by ball-milling, and the effects of LiAlH 4 content on structure and electrochemical properties of the composites were investigated systematically. The addition of LiAlH 4 to the Ti 1.4 V 0.6 Ni alloy significantly affected the morphology and size of the composite particles . The electrochemical cycling stability and rate dischargeability of the composite electrodes benefitted from adding some LiAlH 4 ( x = 1), which however deteriorated when the LiAlH 4 content increased further. The positive effect of LiAlH 4 on the electrochemical performance of the studied alloy was caused by suppression of the dissolution of active components of the Ti 1.4 V 0.6 Ni hydrogen storage alloy.
研究领域:
材料科学
·
金属功能材料
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能源存储
·
电化学
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氢能技术
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危险品化学品经营许可证（带存储）