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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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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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·Vol. 43
·期 14
·6795-6803
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IF 4.229
Lin Li,Bo Jiang,Dawei Tang,Qian Zhang,Zhouwei Zheng
In this work, La 1− x Ce x NiO 3 perovskite-type oxide derived catalysts were synthesized for hydrogen generation from acetic acid steam reforming process (AcSR), and the effect of Ce substitution was investigated. Various techniques were applied to characterize the properties of synthesized catalysts including X-ray diffraction (XRD), H 2 temperature-programmed reduction (TPR), H 2 chemisorption , transmission electron microscopy (TEM), N 2 adsorption-desorption, and thermogravimetric analysis (TGA). The characterization results demonstrated that the perovskite-type oxide derived catalysts possessed uniform Ni dispersion and small Ni particle size. The adding of Ce remarkably increased the metal support interaction , improved the coke resistance and enhanced the water gas shift reaction . The reactivity and stability tests were conducted in a fixed-bed reactor. The La 0.9 Ce 0.1 NiO 3 exhibited the best performance for AcSR with an average H 2 yield of 90%, an average acetic acid conversion of 95%, and an accumulated coke deposition of 11.8 wt% in a 30-h stability test.
研究领域:
催化化学
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能源材料
·
化学工程
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Rui Yang,Xuefeng Bai,Xiangfeng Guo,Kun Song,Lihua Jia,Xiaoshuang Chen,Jun Wang
The rational construction of hierarchical electrode materials has always been an attractive strategic development in energy storage. In this paper, the porous Ni/C (NC) substrate, which is derived from Ni metal–organic frameworks (Ni-MOFs), is served as the conductive skeleton on Ni foam (NF) for supporting two different morphologies NiCo 2 O 4 nanostructure arrays (NiCo 2 O 4 /NC). The hierarchical layered nanomaterial utilizes the porous NC substrate as “favorable skeleton” for electron transfer and is coupled to vertical well-organized NiCo 2 O 4 nanoarrays to improve specific capacitance of composites. Benefits from the advantages of hierarchical layered structure, the electrochemical properties of as-constructed NiCo 2 O 4 /NC with two different morphologies were better than those of pure NiCo 2 O 4 prepared under the same conditions. Moreover, the optimized NiCo 2 O 4 nanowires arrays on NC substrate (NiCo 2 O 4NWs /NC) electrode acquire prominent specific capacitance of 1945.9 F g −1 (270.3 mAh g −1 ) at 1 A g −1 and good rate performance. Additionally, the assembled asymmetric device by NiCo 2 O 4NWs /NC and carbon nanotube (CNT) displays a high energy density of 58.31 Wh kg −1 at a power density of 749.7 W kg −1 , as well as good cyclic stability. The remarkable properties manifest that the hierarchical NiCo 2 O 4NWs /NC electrode has a good prospect in electrochemical applications.
研究领域:
材料科学
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能量存储
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电化学
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纳米材料
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NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 47
·期 1
·109-119
·
IF 3.925
Debin Ji,Yao Liu,Xuepeng Wang,Zhiqiang Qiao,Jialiang Yang,Ziheng Bai,Shuxia Guan,Zhandong Li,Hongjun Wu,Yongde Yan
Nuclear energy is widely used as an efficient energy. However, the production of a large amount of uranium-containing wastewater is considerably harmful to the environment. Adsorption is a commonly used method for removing uranium ions from water. In this study, carbon nanotubes (CNTs) were first modified with polyethyleneimine (PEI), and then Ni–Al-layered double hydroxide (LDH) was anchored to CNT-PEI (CNT-P) by using the co-precipitation method to obtain CNT-P/LDH (NO3−). The experimental results indicated that the adsorption process was consistent with Langmuir kinetic adsorption and Sips adsorption isotherm models at the pH of 6. The fit result of the Sips adsorption isotherm model indicated that the adsorption capacity of CNT-P/LDH was 646.6 mg g−1. XPS analyses showed that the adsorption of uranium on CNT-P/LDH mainly involved three aspects. Tests were conducted for different salinities, and the results showed a uranium removal rate of >95% at a salinity of 3.5%.
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-9
·
IF 17.694
Zhang Xiaoran,Zhu Xiaorong,Bo Shuowen,Chen Chen,Qiu Mengyi,Wei Xiaoxiao,He Nihan,Xie Chao,Chen Wei,Zheng Jianyun,Chen Pinsong,Jiang San Ping,Li Yafei,Liu Qinghua,Wang Shuangyin
Electrocatalytic urea synthesis emerged as the promising alternative of Haber–Bosch process and industrial urea synthetic protocol. Here, we report that a diatomic catalyst with bonded Fe–Ni pairs can significantly improve the efficiency of electrochemical urea synthesis. Compared with isolated diatomic and single-atom catalysts, the bonded Fe–Ni pairs act as the efficient sites for coordinated adsorption and activation of multiple reactants, enhancing the crucial C–N coupling thermodynamically and kinetically. The performance for urea synthesis up to an order of magnitude higher than those of single-atom and isolated diatomic electrocatalysts, a high urea yield rate of 20.2 mmol h −1 g −1 with corresponding Faradaic efficiency of 17.8% has been successfully achieved. A total Faradaic efficiency of about 100% for the formation of value-added urea, CO, and NH 3 was realized. This work presents an insight into synergistic catalysis towards sustainable urea synthesis via identifying and tailoring the atomic site configurations.
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FUEL PROCESSING TECHNOLOGY
·
2023
·
IF 7.5
Yuanling Li,Han Yu,Jing Dai,Zhenzong Zhang,Zhichao Zhang,Hongbing Yu,Lina Liu
Non-thermal plasma (NTP) combined with catalysts supplies a potential alternative to enable the CH 4 and CO 2 conversion to work at low temperatures. In this study, different Ni/BN catalysts were synthesized using modified wetness impregnation for CH 4 and CO 2 conversion in dielectric barrier discharge (DBD) plasma. Among, BN_IPA_Ni exhibited the highest catalytic performance with a CH 4 conversion of 40.5%, a CO 2 conversion of 26.6%, a H 2 yield of 9.3% and a CO yield of 10.5%. The development of B O defects, which played a significant role in the size control of Ni particles to facilitate the dissociation of CH 4 to form H*, is the key for the high catalysis activity and selectivity in this reaction. In addition, the B O defects of BN_IPA_Ni provide an efficient route to eliminate excess CH x species, which further inhibit the nucleation growth of carbon species to inert carbon.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Bingjie Huo,Jingxue Wang,Zichen Wang,Chao Liu,Wenjing Hao,Yinglong Wang,Peizhe Cui,Jianguang Qi,Jun Gao,Jingwei Yang,Fanqing Meng
Wood is a natural material with low cost and easy recovery, which porous, layered, excellent structure and mechanical properties make it possible to apply in wastewater treatment. We have successfully grown MoS 2 on natural wood containing porous cellulose and introduced the high conductivity circuit path provided by Ni nanoparticles to construct a new piezoelectric three-dimensional wood block for the efficient degradation of tetracycline. Ni/MoS 2 /Wood exhibited excellent piezo-catalytic degradation performance, and the degradation rate of tetracycline reached 95.96 % (k = 0.0411 min −1 ) under ultrasonic vibration. After 5 cycles, the degradation rate still reached 90.20 %. In addition, Ni/MoS 2 /Wood was used as the reactor filler to degrade tetracycline through piezoelectric response triggered by hydrodynamic force, and the degradation rate reached 90.27 % after 60 min. Further, the mechanism and the possible degradation pathways of tetracycline degradation were proposed. This low-cost, recyclable and stable three-dimensional wood block piezoelectric material provides a new idea for the practical application of wastewater treatment.
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高影响因子
JOURNAL OF RARE EARTHS
·
2023
·
IF 4.9
Bolang Li,Fei Wang,Kai Li,Ping Ning,Min Chen,Changbin Zhang
The chemical transformation of CO 2 produces carbon compounds that can be used as precursors for the production of chemicals and fuels. Here, we investigated the activity and selectivity of the transition metals (Fe, Co, and Ni) supported on CeO 2 catalyst for CO 2 hydrogenation at atmospheric pressure. We found that Ni/CeO 2 shows the highest CO 2 conversion compared with Fe/CeO 2 and Co/CeO 2 . Besides, Co/CeO 2 and Ni/CeO 2 exhibit nearly 100% CH 4 selectivity while Fe/CeO 2 inclines to produce CO. The characterization results show that the metal-support interaction order is Fe/CeO 2 > Co/CeO 2 > Ni/CeO 2 , the weak metal-support interaction over Ni/CeO 2 benefits the activation of H 2 and then promotes the activity of CO 2 hydrogenation. Additionally, in situ DRIFTS results demonstrate that monodentate formate species rather than bidentate formate are the active intermediates. The main route of CO 2 hydrogenation to CH 4 is that CO 2 is firstly transformed to m-HCOO∗ and then direct hydrogenation of the m-HCOO∗ to CH 4 . This study provides insights into the understanding of the mechanisms of CO 2 hydrogenation on CeO 2 based catalysts.
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DIAMOND AND RELATED MATERIALS
·
2022
·
IF 3.806
Qi Qu,Huanhuan Wang,Qianpeng Dong,Yan He
In the current work, Ni-Co/CNTs networks were firstly produced by a simple annealing treatment of Ni Co PBA, which was then used as a carbon-based carrier and successfully deposited Fe 3 O 4 nanospheres via a classic hydrothermal reaction process. Additionally, the electromagnetic wave absorption performances of composites could be effectively affected by adjusting the mass ratio of the Fe 3 O 4 nanoparticles . The minimum reflection loss (RL min ) of −48.76 dB was achieved for Fe 3 O 4 @Ni-Co/CNTs-1# at 3.5 mm thickness. Meanwhile, Fe 3 O 4 @Ni-Co/CNTs-2# exhibited a wide effective absorption band (EAB) of 5.9 GHz (12.1–18 GHz) at a 2.0 mm matching thickness, suggesting that the Fe 3 O 4 @Ni-Co/CNTs composites were a promising absorber for electromagnetic wave absorption materials . Based on the synergistic effects of dielectric and magnetic losses generated by Ni-Co/CNTs and Fe 3 O 4 , respectively, and appropriately matched impedances, a new strategy for fabricating lightweight, thin-thickness, strong absorption, and wide-bandwidth materials was provided.
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FUEL
·
2022
·
IF 8.035
Leilei Xu,Chunying Xu,Bin Chen,Yufang Bian,Xueying Wen,Ge Cheng,Cai-e Wu,Jian Qiu,Mindong Chen
In this work, a series of hexagonal mesoporous silica (HMS) confined Ni-based CO 2 methanation catalysts were successfully synthesized by the facile one-pot strategy. In the Ni-HMS system, the metallic Ni active sites were embedded in the framework of HMS support. Hence, the metallic Ni active sites were highly dispersed and stably confined by the HMS framework. The kinetic study demonstrated that the Ni-HMS catalysts behaved much lower apparent activation energy than the 15Ni/HMS and 15Ni/SiO 2 catalysts, accounting for their enhanced low-temperature activities. Meanwhile, the online TPSR and in-situ DRIFTS of the CO 2 methanation were employed to study the reaction intermediates over these catalysts. The CHOO–, CH x O-, and CO x were considered as the reaction intermediates over the Ni-HMS catalysts and the possible reaction pathways were also proposed. In conclusion, the Ni-HMS catalysts were considered as a series of efficient and stable catalyst candidates for CO 2 methanation.
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CHEMICAL ENGINEERING & TECHNOLOGY
·
2023
·Vol. 46
·期 5
·918-926
·
IF 2.1
Guoqiang Li,Yunfei Zhang,Guojie Zhang,Yinghui Sun,Jiwei Liu
Different promoters have a significant impact on the catalyst performance. In this paper, the effects of different promoters on the physical properties and catalytic behavior of methane dry reforming catalysts were investigated. A series of characterizations showed that the Mg, Ba, and Ca promoters increased the basicity of the catalysts. However, their high concentration of OH − leads to the destruction of Ni 3 Si 2 O 5 (OH) 4 species, which results in a decrease of catalytic performance. The addition of Ce significantly improves the catalyst stability. After 100 h of Ni-5Ce-MSC reaction, there was almost no carbon deposition, exhibiting high activity and resistance to carbon accumulation. These findings provide a new perspective for the design of nickel-based dry reforming catalysts.
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