INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·Vol. 44
·期 2
·680-693
·
IF 4.229
Chao Wang,Mingzheng Liao,Enqi Bu,Zhiqiang Jiang,Ying Chen,Zhengdong Cheng,Xianglong Luo,Bo Liang,Riyang Shu,Qingbin Song
In this work, hydrogen production from partial oxidation (POX) of propane over composite Ni/Al 2 O 3 SiC catalyst was investigated. In order to utilize the high thermal conductivity and chemical stability of SiC , the composite Al 2 O 3 SiC support of the catalyst was synthesized by precipitation technique, then Ni component was loaded using impregnation method. The as-prepared samples were characterized by X-ray diffraction, BET, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) measurements. As observed, stacking porous structures were appeared after calcination process by doping SiC with certain ratios. According to the stiochiometric ratio, a C 3 H 8 O 2 (1:1.5) gas mixture was used to study the catalytic activity for hydrogen production from POX of propane. From the results, local overheat of the catalyst bed generated by the exothermic reactions was relieved by doping SiC and Ni/Al 2 O 3 SiC (30 wt%) catalyst performed a higher hydrogen production. Aggregation and carbon deposition of Ni/Al 2 O 3 SiC (30 wt%) catalyst were reduced compared to Ni/Al 2 O 3 from the observation of SEM and TEM with H 2 production up to around 236 μmol/g cat ·s and kept stable for 26 h at 600 °C. By means of TGA , non-isothermal oxidative decarburizations of the spent catalysts were studied. It was found that less carbon deposit and lower activation energy for oxidative decarburization were found by doping SiC to Ni/Al 2 O 3 .
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International Journal of Electrochemical Science
·
2023
·
IF 1.5
Hui Hua Peng,Liang Zhang,De Yi Jiang,Jie Chen
Rhombohedral MnCO 3 nanoparticles were successfully grown on nickel foam via a facile and one-pot water-bath means, wherein the hydrolyzation of urea supplied alkali and carbonate ions. The structure and morphology of the nanocomposites were investigated by XRD, FIB/SEM and elemental mapping. Microscopic investigations revealed MnCO 3 particles with mean sizes that varied from 110-255 nm. EDS mapping showed a homogeneous distribution of manganese, carbon and oxygen. The electrochemical properties of the produced composites were estimated by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS) measurements using 6 M KOH as the electrolyte. The resulting electrodes displayed maximum specific capacitance (163.7 F g -1 at 0.5 A g -1 ), respectable rate capability, and excellent long-term cycling life (91% retention after 1000 cycles). In addition, this manuscript offers us a simple and rapid strategy for the fabrication of electrode materials for use as energy storage devices.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2015
·
IF 2.999
Linjie Gao,Shufang Wang,Ran Liu,Shengjun Zhai,Hongrui Zhang,Jianglong Wang,Guangsheng Fu
Cd 1-x Ni x O ceramics were synthesized by the conventional solid state reaction method and the effect of Ni doping on the thermoelectric performance of CdO was investigated. The introduction of Ni led to dramatic changes in the electrical transport behaviors of CdO ceramics and thus an improvement in power factor, which were suggested to be related to the widening of the band gap as well as the formation of an impurity level in the band gap of CdO after the substitution of Ni 2+ for Cd 2+ . Doping of Ni also had a significant influence on the microstructure of CdO along with the development of NiO second phase when the Ni concentration exceeded 1%, which effectively suppressed the heat transfer by enhanced phonon scattering. Benefiting from the improved power factor and the reduced thermal conductivity , a high ZT of 0.43 was achieved in the Cd 0.99 Ni 0.01 O sample at about 1000 K.
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MATERIALS LETTERS
·
2013
·
IF 2.224
Jie Shao,Xuezhang Xiao,Xiulin Fan,Lixin Chen,Hongyi Zhu,Siqi Yu,Zhaodong Gong,Shouquan Li,Hongwei Ge,Qidong Wang
A novel method for the synthesis of amorphous Ni–B nanoparticles has been developed using a mechanochemical displacement reaction by high energy ball milling . Based on various characterizations including XRD , ICP, BET, DSC , SEM, TEM and XPS , the synthesized Ni–B amorphous nanoparticles are present in the form of uniform and homogeneously distributed ultrafine nanoparticles with the size around 5 nm. Larger specific surface area and higher thermal stability can be obtained by such mechanochemical method than the conventional wet-chemical reduction method. The present work provides a novel method for preparation of other amorphous nanoparticles, and greatly expands the industrial application space of Ni–B amorphous nanoparticles.
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MATERIALS RESEARCH BULLETIN
·
2025
·
IF 5.7
Kang Wei,Jun Li,Xiao Sun,Meng Shao,Jianguo Tang,Soowohn Lee
rGO/Ni(OH) 2 /Ni 3 S 2 composite electrode materials were successfully synthesized on Ni foam (NF) by a two-step hydrothermal process and subsequent alkalization treatment. To investigate the influence of reaction time in the secondary hydrothermal process, three different hydrothermal times (4 h, 6 h, 8 h) were set. The results showed that the electrode had the highest specific capacitance of 2260 F·g −1 at 1 A·g −1 at the hydrothermal reaction time of 6 h, (4 h: 1807.8 F·g −1 , 8 h: 1358.3 F·g −1 ). In addition, it exhibited prominent rating capability and cycling stability, with 41.7% retention at 10 A·g −1 and 137.9% retention after 5000 cycles at 50 mV⋅s −1 . Finally, the assembled hybrid supercapacitor (HSC) with rGO/Ni(OH) 2 /Ni 3 S 2 /NF (6 h) and active carbon displayed outstanding electrochemical performance. When the power density was 400.5 W⋅kg −1 , it showed the energy density (25.2 Wh⋅kg −1 ), proving its potential as electrode materials for HSC devices.
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POWDER TECHNOLOGY
·
2024
·
IF 4.5
Yuxiao Xue,Deqing Zhu,Jian Pan,Gen Li,Xuewei Lv
In this paper, two types of Ni-Cr bearing composite burdens including SP1 (79% Ni-bearing sinter and 21% Cr-bearing oxide pellets) and SP2 (84% Ni-bearing sinter and 16% Cr-bearing pre-reduced pellets) were used for the more efficient preparation of high-Cr ferronickel . Based on the metallurgical performance characterization, thermodynamic analysis and smelting parameters optimization, the qualified high-Cr ferronickel were prepared by the utilization of the Ni-Cr bearing composite burdens. The recovery rates of iron, chromium and nickel exceed 95%, 90% and 98% whereas their grades are 85.56–85.88%, 7.82–8.02% and 1.59–1.62%, respectively. Compared with SP1, SP2 possesses lower smelting duration, which indicates the appropriate proportioning of Cr-bearing pre-reduced pellets is beneficial for the smelting process. The obtained high-Cr ferronickel consisting of (Fe, Cr) 3 C and (Fe, Cr) 7 C 3 can be used as a low-cost substitute for the conventional raw materials of 200 or 300 series of stainless steel .
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Journal of Energy Chemistry
·
2025
·
IF 14.9
Weili Sun,Qingqing Zhang,Xiao-Guang Sun,Cheng Li,Yongsheng Huang,Wenyu Mu,Junbin Tan,Jianlin Li,Kai Liu,Shijian Zheng,Sheng Dai
Nickel-rich (Ni ≥ 90%) layered oxides materials have emerged as a promising candidate for next-generation high-energy-density lithium-ion batteries (LIBs). However, their widespread application is hindered by structural fatigue and lattice oxygen loss. In this work, an epitaxial surface rock-salt nanolayer is successfully developed on the LiNi 0.9 Co 0.1 O 2 sub-surface via heteroatom anchoring utilizing high-valence element molybdenum modification. This in-situ formed conformal buffer phase with a thickness of 1.2 nm effectively suppresses the continuous interphase side-reactions, and thus maintains the excellent structure integrity at high voltage. Furthermore, theoretical calculations indicate that the lattice oxygen reversibility in the anion framework of the optimized sample is obviously enhanced due to the higher content of O 2 p states near the Fermi level than that of the pristine one. Meanwhile, the stronger Mo–O bond further reduces cell volume alteration, which improves the bulk structure stability of modified materials. Besides, the detailed charge compensation mechanism suggests that the average oxidation state of Ni is reduced, which induces more active Li + participating in the redox reactions, boosting the cell energy density. As a result, the uniquely designed cathode materials exhibit an extraordinary discharge capacity of 245.4 mAh g −1 at 0.1 C, remarkable rate performance of 169.3 mAh g −1 at 10 C at 4.5 V, and a high capacity retention of 70.5% after 1000 cycles in full cells at a high cut-off voltage of 4.4 V. This strategy provides an valuable insight into constructing distinctive heterostructure on high-performance Ni-rich layered cathodes for LIBs.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Bei-Bei Zhang,Ping Liu,Hao-Ran Wang,Yan-Yang Li,Lin Zhang,Qing-Chao Liu,Zhong-Jun Li,Hong-Chang Yao
Developing efficient photocatalysts for solar-driven overall water vapor splitting is crucial for sustainable hydrogen production. However, current photocatalytic efficiencies are limited by inadequate hygroscopicity, sluggish proton transport, and rapid recombination of photogenerated electron-hole pairs. Here, we report the successful synthesis of an amorphous Ni(OH) 2 /Ni 2 B heterojunction material with a core–shell structure by regulating the reducing environment during the formation of nickel boride. This material exhibits highly efficient overall water vapor splitting performance without any cocatalysts. Under simulated solar irradiation, the optimized sample achieves a hydrogen production rate of 976 μmol·g −1 ·h −1 , with near-stoichiometric evolution of hydrogen and oxygen, an apparent quantum yield of 5.4 %, and a solar-to-hydrogen conversion efficiency of 3.8 %. The enhanced performance is attributed to the unique amorphous/amorphous heterojunction structure that promotes effective charge separation, the abundant surface hydroxyl groups that improve proton transport and hygroscopicity, and the formation of photo-induced frustrated Lewis pairs (FLPs). Our findings shed light on the critical role of amorphous structures and surface chemistry in boosting photocatalytic activity, paving the way for the rational design of advanced photocatalysts for overall water vapor splitting.
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Haitao Wang,Hong Zhu,Zhenggang Bu,Kai Dan,Chaofeng Shen,Liping Lou
Co-doping with non-metallic and metallic elements offers an effective strategy to address the inherent limitations of zero-valent iron (ZVI) materials, including low reactivity and selectivity towards target contaminants and surface passivation. This study synthesized high-performance sulfur-nickel co-doped microscale ZVI (S-Ni-mZVI) through a facile and cost-effective one-step ball milling method to achieve high dehalogenation activity. A comprehensive comparative analysis between mZVI, S-mZVI, and Ni-mZVI revealed the superior trichloroethylene (TCE) degradation kinetics, electron efficiency, pH tolerance, and long-term activity of S-Ni-mZVI. Specifically, S-Ni-mZVI achieved a pseudo-first-order TCE degradation rate constant of 1.05 h −1 (>97 % removal in 4 h), outperforming mZVI by 150.9-fold, and exhibited an electron efficiency of 70.7 %. Mechanistically, S (FeS) effectively suppressed hydrogen evolution (up to 99.3 % inhibition) and passivated Ni-induced hydrogenolysis, and Ni (Ni-Fe galvanic couple) augmented the electron cloud density of sulfur and synergistically promoted electron transfer in conjunction with FeS, resulting in a 6.4-fold rate acceleration. Furthermore, the co-doping of S and Ni induced Fe⁰ lattice contraction, significantly enhancing the material’s corrosion resistance. Additionally, S-Ni-mZVI exhibited broadened pH adaptability and sustained long-term degradation performance, maintaining a TCE removal rate exceeding 98 % over 13 days. Moreover, the leaching concentration of Ni remained consistently below 0.2 mg·L −1 , confirming the environmental friendliness of the material. Electrochemical analysis and kinetic isotope effect studies further revealed that Ni-mZVI degraded TCE primarily via hydrogenolysis. In contrast, S-mZVI and S-Ni-mZVI mainly employed direct electron transfer ( β -elimination). This work offers a pragmatic and scalable strategy for engineering highly active, electron-efficient, and durable ZVI-based materials for efficient remediation of chlorinated hydrocarbons.
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JOURNAL OF MATERIALS SCIENCE
·
2014
·Vol. 49
·期 20
·6944-6951
·
IF 2.305
Wang Yongjuan,Zhou Yuming,Zhang Tao,He Man,Bu Xiaohai
The biomolecule–inorganic hybrid materials are potential candidates for low infrared emissivity materials due to the combined functionalities of the biomolecules and the inorganic components. In this study, we describe a facile approach to fabricate DNA/layered double hydroxides (LDHs) nanohybrid by coassembly of exfoliated Ni–In LDHs nanosheets with DNA. In the assembly progress, exfoliated LDHs nanosheets and DNA with different initial DNA/LDHs mass ratio were mixed together, and the DNA intercalated LDHs nanohybrid was obtained only when the input DNA/LDHs mass ratio is ≤0.3 mg/mg. The structure and morphology of as-fabricated hybrid materials were characterized by X-ray diffraction (XRD), UV–Vis absorption spectra, Fourier transform infrared (FT-IR) spectra, thermogravimetry (TG), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results indicate that the reassembled product has layered structures incorporated with DNA biomolecule. The nanohybrid with expanding LDHs structure of d
003 = 2.6 nm confirms the intercalation of DNA molecules into the LDHs interlayer. The helix chain oriented parallel to the basal plane of host layer forming ordered sandwich structure. The infrared emissivity value of the DNA/LDHs nanohybrid was then investigated. It was found that the infrared emissivity values were significantly reduced by coassembly of exfoliated LDHs nanosheets with DNA, which may be attributed to the synergistic effect and interfacial interaction between the DNA biomolecule and inorganic LDHs layers reinforced by the construction of ordered sandwich structure.
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Scientific Reports
·
2017
·Vol. 7
·期 1
·1-11
·
IF 4.259
Lu Xinhuan,He Jie,Jing Run,Tao Peipei,Nie Renfeng,Zhou Dan,Xia Qinghua
Biocarbon supported Ni catalysts have been prepared by facile impregnation of Ni species by microwave-heating and used for selective hydrogenation of nitrobenzene to cyclohexylamine. These catalysts were characterized by X-ray diffraction, Raman spectra, N2 sorption measurement, X-ray photoelectron spectroscopy, temperature programmed reduction of H2 and H2 temperature-programmed desorption. The morphology and particle size of catalysts were imaged by scanning electron microscope and transmission electron microscope. For the hydrogenation of nitrobenzene to cyclohexylamine, 10%Ni/CSC-II(b) exhibits the best catalytic activity to achieve 100 mol% conversion of nitrobenzene and 96.7% selectivity of cyclohexylamine under reaction conditions of 2.0 MPa H2 and 200 °C, ascribed to high dispersion of Ni species and formation of nanosized Ni particles on the support aided by microwave-heating. Thus-prepared Ni/CSC catalyst is greatly activated, in which the addition of precious metal like Rh is totally avoided.
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高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2019
·
IF 3.774
Yun-Peng Zhao,Fa-Peng Wu,Qing-Lu Song,Xing Fan,Li-Jun Jin,Rui-Yu Wang,Jing-Pei Cao,Xian-Yong Wei
In this work, a bimetallic catalyst of Pd and Ni supported on HZSM-5 was designed and evaluated in the hydrodeoxygenation of model compounds representing various C–O bonds in lignin. The effects of temperature, holding time, and initial H 2 pressure on the catalytic performance of the Pd–Ni/HZSM-5 catalyst were investigated. The results indicated that the Pd–Ni/HZSM-5 catalyst exhibited superior catalytic activity towards the conversion of the model compounds to alkanes compared to its monometallic counterparts. Direct cleavage of the C–O bond in DPE was achieved under low H 2 pressure, mainly producing benzene and minor amounts of phenol and cyclohexane, while at high H 2 pressure, the reaction pathway was altered towards hydrogenation of the benzene ring , followed by then cleavage of the C–O bond to afford only cyclohexane. Moreover, the Pd–Ni/HZSM-5 catalyst showed high activities when applying other substrates including anisole, veratrole, guaiacol, benzyloxybenzene, phenethyl phenyl ether, and dibenzyl ether.
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