ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Wen Zhu,Subrata Panda,Chong Lu,Zhewen Ma,Darvaish Khan,Jinjian Dong,Fengzhan Sun,Hao Xu,Qiuyu Zhang,Jianxin Zou
In this work, we report the remarkable catalytic effects of a novel Ti3C2 MXene-based catalyst (Ni@Ti-MX), which was prepared via self-assembling of Ni nanoparticles onto the surface of exfoliated Ti3C2 nanosheets. The resultant Ni@Ti-MX catalyst, characterized by ultradispersed Ni nanoparticles being anchored on the monolayer Ti3C2 flakes, was introduced into MgH2 through ball milling. In situ transmission electron microscopy (TEM) analysis revealed that a synergetic catalytic effect of multiphase components (Mg2Ni, TiO2, metallic Ti, etc.) derived in the MgH2 + Ni@Ti-MX composite exhibits remarkable improvements in the hydrogen sorption kinetics of MgH2. In particular, the MgH2 + Ni@Ti-MX composite can absorb 5.4 wt % H2 in 25 s at 125 °C and release 5.2 wt % H2 in 15 min at 250 °C. Interestingly, it can uptake 4 wt % H2 in 5 h even at room temperature. Furthermore, the dehydrogenation peak temperature of the MgH2 + Ni@Ti-MX composite is about 221 °C, which is 50 and 122 °C lower than that of MgH2 + Ti-MX and MgH2, respectively. The excellent hydrogen sorption properties of the MgH2 + Ni@Ti-MX composite are primarily attributed to the peculiar core–shell nanostructured MgH2@Mg2NiH4 hybrid materials and the interfacial coupling effects from different catalyst–matrix interfaces. The results obtained in this study demonstrate that using self-assembling of transition-metal elements on two-dimensional (2D) materials as a catalyst is a promising approach to enhance the hydrogen storage properties of MgH2.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·
IF 3.9
Nuo Xu,Jianghui Miao,Fengquan Li,Yilin Tan,Junli Wang,Suni Hou,Yajuan Wu,Xingchao Dai
The hydrogenation of aliphatic nitriles is an atom-efficient and environmentally benign approach to the synthesis of primary amines. Here, a Pd/Ni/MgO-Al2O3–B catalyst with maximized Pd utilization was successfully designed and fabricated for the selective hydrogenation of aliphatic nitriles to corresponding primary amines, delivering a full conversion of lauronitrile with 99% laurylamine yield under mild conditions (60 °C, 1.5 MPa H2). The remarkable catalytic performance might be attributed to the PdNi synergy facilitating hydrogen adsorption and activation combined with the moderate-strength surface acidity of the MgO-Al2O3 composite support favoring lauronitrile adsorption and laurylamine desorption. Moreover, this catalytic system exhibits remarkable functional group tolerance, excellent recyclability, and exceptional performance for the in situ hydrogenation of aliphatic nitriles into primary amines in industrial wastewater treatment. This work not only provides an effective and practical protocol for the synthesis of primary amines from nitriles but also contributes to sustainable treatment of nitrile-containing wastewater.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yuning Shi,Shuang Zhang,Xueai Li,Chunsheng Wang,Hang Li,Jinjin Yang,Kexin Jin,Wanchun Guo,Kesong Tian,Yahui Wang,Haiyan Wang
The local chemical structure of carbon can be effectively tuned by highly homogeneous dispersed Ni/Co nanoparticles with diameters of dozen nanometers by their catalysis for carbon graphitization during carbonization process of polymer which thereby induces multiple polarization relaxation, ultimately enabling excellent microwave absorption performance. However, realizing uniform distribution and precise size control remained challenging due to magnetic aggregation and Ostwald ripening during thermal treatment. Herein, a metal-ion coordination strategy achieves homogeneous nanoparticle dispersion by leveraging the strong chelation between tannic acid and metal ions. The differential stability of these coordination bonds dictates nanoparticle growth kinetics, enabling precise size control. This tailored nanoparticle size subsequently governs the chemical structure of the carbon to modulate polarization loss. Benefiting from these finely tuned graphitization percentage and distribution, the carbon with highly homogenous dispersed Ni nanoparticles of 12–14 nm in diameters (TAC Ni) concurrently established an efficient conductive network, abundant heterogeneous interfaces and ample defects for polarization centers, leading to optimized dielectric loss. Consequently, TAC-Ni achieved an impressive effective absorption bandwidth (EAB) of 6.0 GHz at a thickness of 2.19 mm. This work not only provided a novel and controllable synthetic route for highly-dispersed carbon with highly homogenous dispersed magnetic nanoparticles but also offered a new perspective for designing high-performance microwave absorbing materials (MAMs).
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Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·237
·
IF 38.5
Wang Xiaoxue,Xu Yuhui,Zhang Jianhua,Xi Yukun,Hou Ningjing,Chen Yixuan,Liu Dongzhu,Yang Zihao,Wen Haocheng,Kang Jia,Yang Xiaoli,Song Xuexia,Wang Jingjing,Li Wenbin,Zhang Jiujun,Zhang Kun,Li Xifei
Na4Fe3(PO4)2P2O7 (NFPP) is regarded as a prospective cathode for sodium-ion batteries (SIBs) because of its high structural stability and cost-effectiveness. However, its practical application is hindered by intrinsically low electronic conductivity. Herein, an unconventional electron transfer mechanism from Ni2+ to Fe3+ ions is unveiled in Ni-doped Na4.3Fe3(PO4)2P2O7 (NFPP-Ni) cathode, which facilitates electronic coupling within the Fe−O−Ni coordination unit and thereby effectively boosts electron transport. Moreover, the redox kinetics and reversibility of NFPP materials are predominantly governed by the degree of Fe−O covalency. The intermediate eg occupancy of Fe2+, modulated by the presence of Ni2+, optimizes the overlap between Fe d and O p orbitals. The adjustment of Ni dopant strikes a balance between accelerating Na+ diffusion kinetics and mitigating lattice strain during cycling. As a result, the NFPP-Ni electrode displays impressive rate capacity (121.0 mAh g−1 at 0.1C / 80.9 mAh g−1 at 10C) and stable cyclability (89.1% capacity retention after 1000 cycles). More importantly, the relationship between Fe eg orbital occupancy and Fe−O covalency in NFPP as modulated by various transition metal cations (Ni2+, Mn2+, Zn2+, Co2+ and Cu2+) with different electron configurations are systematically elucidated, thereby providing insights for the commercial development of sodium-ion batteries (SIBs).
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Ying Ji,Honglei Liu,Yujiao Guo,Junming Guo,Mingwu Xiang,Wei Bai,Xiaofang Liu,Hongli Bai
At high current density, low capacity and rapid capacity decay of spinel LiMn 2 O 4 cathode material during the cycle limit its application. Herein, element doping approach to restrain Jahn-teller effect combined with crystal plane regulation to mitigate Mn dissolution is employed to synthesize a series of truncated octahedron LiNi 0.02 Fe x Mn 1.98−x O 4 (x ≤ 0.12) which provide high exposure {111} surfaces as well as a small portion of {110} and {100} facets for offering Li + ion rapid diffusion channel. Many characterizations such as XRD , SEM and TEM show that Ni-Fe co-doped can effectively promote the development of crystal and the preferential growth of crystals planes. Electrochemical test results imply that at 1 C the difference between capacity and capacity retention ratio in terms of LiNi 0.02 Mn 1.98 O 4 (LNMO) and Ni-Fe co-doping samples are not obvious. With the increasing of current densities, Ni-Fe co-doping samples exceptional rate capability and cycle stability become apparent. The optimal LiNi 0.02 Fe 0.05 Mn 1.93 O 4 (LNFMO-5) and LNMO can keep 76.9% and 74.6% of their original capacity of 113.4 mAh·g ‐1 as well as 116.2 mAh·g ‐1 after 500 cycles at 1 C, respectively. At 10 C, the LNFMO-5 sample delivers the capacity of 89.3 mAh·g ‐1 and a higher capacity retention ratio of 72.9% after 2000 cycles, while the LNMO sample is only 63 mAh·g ‐1 and 67.2%. Even at 20 C, The LNFMO-5 sample still reaches a high specific capacity of 84.9 mAh·g ‐1 and a higher capacity retention ratio of 76.1% after 2000 cycles, which are much higher than the LNMO sample (63.0 mAh·g ‐1 ) and 57.4% capacity retention rate. CV and EIS analysis manifest that the LNFMO-5 has a higher D Li + and a lower E a than that of the LNMO. A unique Ni-Fe co-doped truncated octahedral LiMn 2 O 4 material with exceptional electrochemical property will be an attractive candidate for the preparation high-performance and long-cycle spinel LiMn 2 O 4 cathode materials.
研究领域:
材料科学
·
电化学
·
储能技术
·
锂离子电池
·
正极材料
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高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Tao Jiang,Bowen Zhu,Haiyun Shen,Ying Liu,Hao Liu,Wei Zheng,Mengtao Wu,Ning Xu,Li Chen
The Ni-rich LiNixCoyMn1–x–yO2 with high specific capacity and superior thermal stability under a high cutoff voltage (>4.3 V) will play a critical role in high-power lithium-ion batteries (LIBs). In this paper, LiNi0.8Co0.1Mn0.1O2 (NCM811) equipped with a stable garnet ceramic Li6.5La3Zr1.5Ta0.5O12 (LLZTO) nanoshell is successfully synthesized via a simple wet chemical approach. X-ray diffraction, scanning electron microscope (SEM), energy-dispersive spectrometer (EDS) element mapping, and transmission electron microscopy (TEM) confirm the presence of LLZTO on the NCM811 surface. The NCM811 with 2 wt % LLZTO (2-NCM811) can deliver a superior specific capacity of 144.4 mAh·g–1 at 1C (2.8–4.3 V) after 100 cycles, accompanied by a capacity retention rate as high as 81.1%. But pristine NCM811 has a discharge capacity of only 119.6 mAh·g–1 and a capacity retention rate as low as 69.5% under the same condition. What is more, 2-NCM811 exhibits an enhanced discharge capacity of 129.6 mAh·g–1 at 1C (2.8–4.5 V) after 100 cycles and a high capacity retention rate of 62.9%, which are superior to those of pristine NCM811 (110.0 mAh·g–1, 57.6%). The improved high-potential performance of 2-NCM811 can be attributed to the positive role of the LLZTO shell, which enhances the structural stability and simultaneously inhibits adverse side reactions at the surface of 2-NCM811 during cycling. Based on the above advantages, LLZTO with three-dimensional (3D) diffusion pathways and high ion conductivity is expected to be the most prospective material for the surface modification engineering of nickel-rich cathode materials in lithium-ion batteries (LIBs).
研究领域:
材料科学
·
电化学
·
储能技术
·
锂离子电池
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高影响因子
Nanoscale
·
2020
·Vol. 12
·期 26
·14267-14278
·
IF 6.895
Muhammad Asif,Muhammad Rashad,Zeeshan Ali
Among post-lithium ion batteries, magnesium ion batteries (MIBs) are receiving growing attention due to their divalent nature, intrinsic low cost, dendrite free cycling, and atmospheric stability. However, their realization is constrained because of the absence of suitable cathodes that can accommodate Mg2+ with fast reversibility. To bypass the sluggish movement of Mg2+ ions inside the cathode and utilize the full advantage of the Mg anode, a Mg2+/Li+ hybrid ion battery (MLIB) is introduced here with rationally designed porous Ni/Zn co-doped CoS2@C spheres as the cathode material. The Ni/Zn-CoS2@C cathode with high porosity and electrical conductivity showed an appreciable specific capacity of 158 mA h g−1 at 20 mA g−1 for MIBs, which was significantly boosted up to 667 mA h g−1 at a current density of 50 mA g−1 by employing Mg2+/Li+ hybrid electrolytes. Their specific capacity and the corresponding energy density (614 W h Kg−1) are the highest among MLIBs and comparable to those of lithium ion batteries. Furthermore, MLIBs displayed significant cycling stability by retaining the maximum specific capacities of 324.6 and 230 mA h g−1 at 100 and 500 mA g−1, respectively after 100 cycles. The excellent electrochemical properties of the synthesized cathodes are attributed to their high porosities and electrical conductivities, the synergistic effect of doped species and their capability to accommodate both Mg2+ and Li+ ions without side reactions. Various ex situ characterization tools were employed to develop further understanding of the intercalation chemistries and mechanisms of both Mg2+ and Li+ ions inside host materials.
研究领域:
储能
·
电化学
·
材料科学
·
电池技术
·
纳米材料
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高影响因子
FUEL
·
2022
·
IF 8.035
Zhiliang Ou,Jingyu Ran,Huayu Qiu,Xin Huang,Changlei Qin
The acidity and basicity of Ni based catalysts play very important role in the catalytic performance during dry reforming of methane. Hence, the effects of surface basicity regulated by adding the oxides (CaO, MgO, ZnO and La 2 O 3 ) in Ni/CeO 2 catalysts on the catalytic behavior were systematically investigated, and the characterization methods and DFT calculations were performed to reveal the underlying mechanism. It was found that the addition of basic oxides could improve the activity and stability due to these oxides could increase the adsorbed oxygen, reduce the size of Ni particle and improve the interaction between Ni and support, in particular, the MgO interacts with Ni to form MgNiO 2 spinel, which contribute to promote Ni dispersion and inhibit Ni aggregation. Moreover, the results suggested that the resistance to carbon deposition has something to do with the surface basicity. To a certain degree, the increasing the amount of basic site and enhancing alkaline strength could suppress the carbon deposition of Ni based catalysts. This is mainly because that the basic site is beneficial to CO 2 adsorption and activation based the DFT calculations, which could accelerate the elimination of carbon deposition by provide more oxygen species. These results could provide some useful information to the design and synthesis of Ni-based catalysts.
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DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 40
·15354-15360
·
IF 4.569
Dandan Chu,Yan Wang,Dong Li,Xue-Qiang Chu,Danhua Ge,Xiaojun Chen
In this study, we fabricated a novel non-enzymatic glucose sensor based on prism-like bimetallic alkaline carboxylate (CoNi–MIM). The morphology and structure of CoNi–MIM were carefully investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM), powder X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The electrochemical glucose oxidation of the synthesized sensor was then explored by cyclic voltammetry (CV) and chronoamperometry in alkaline medium. It was found that CoNi–MIM is the optimal choice with a remarkably high sensitivity of 5024.4 μA mM−1 cm−2, low detection limit of 56.1 nM (S/N = 3), linear response of up to 14.3 mM and excellent selectivity compared to Co-MIM, CoFe-MIM and CoMn-MIM. Furthermore, the as-fabricated sensor demonstrated appreciable practicality for the determination of glucose in real samples. These results indicate that CoNi–MIM holds a good application prospect in non-enzymatic glucose sensing.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Haiwen Gao,Yang Wang,Honglong Shen,Zongdeng Wu,Juanjuan Song,Jia Yu,Cai Liu,Haiyan Jing,Peng Zhao,Wu Lei,Qingli Hao
From the perspective of nano science and nanotechnology, it is very interesting and important to develop a reasonable and practical synthesis route of nanomaterials for production and life. Here, we develop a strategy of hollow cubic metal oxide nanocages. The method was inspired by Pearson’s Hard-Soft-Acid-Base (HSAB) theory, and nanocages with excellent performance were prepared by coordination etching and optimization of reaction conditions. Firstly, Cu 2 O nanocubes were prepared by redox reaction at room temperature. Then, the hollow cubic NiCo 2 O x /CeO y nanocages were obtained by HSAB theory and cerium doping. The nanomaterial has a specific capacitance of up to 1976 F/g at the current density of 1 A/g. In addition, the asymmetric supercapacitor (ASC) prepared with hollow cubic NiCo 2 O x /CeO y nanocage as cathode and active carbon as anode exhibits an energy density as high as 37.1 Wh kg −1 at the power density of 375 W kg −1 . The capacitance retention rate of the device is 91.5 % after 10,000 cycles. The device can be charged to light up LED lights. These excellent electrochemical properties, due to their unique structure and synergistic effect between materials, indicate the potential application value of hollow cubic NiCo 2 O x /CeO y nanocages in high-performance supercapacitors.
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ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Qiyuan Zheng,Zuoying Cao,Shengxi Wu,Qinggang Li,Mingyu Wang,Wenjuan Guan,Guiqing Zhang
Direct extraction of Ni(II) from Fe(III), Al(III), Ca(II), Mg(II), and Mn(II) is a bottleneck issue in the hydrometallurgy processes of laterite-nickel ore, spent batteries, and other secondary sources. One of the biggest challenges in achieving direct extraction of Ni(II) is the lack of stable and efficient extractants. Hence, a novel bipyridine extractant MSL211 was designed and synthesized in this paper. With its strong steric resistance and electrostatic interaction, MSL211 can form a stable eight-membered chelating ring with Ni(II), thereby having a high bonding ability toward Ni(II). Therefore, based on the high bonding ability of MSL211 toward Ni(II) and the low extraction capacity of DNNSA for Fe(III), an efficient synergistic extraction system of DNNSA-MSL211 was proposed. The synergistic extraction system of DNNSA-MSL211 realizes direct extraction of Ni(II) from Fe(III), Al(III), Ca(II), Mg(II), and Mn(II) without neutralization, precipitation, and solid/liquid separation processes, which are inevitable but problematic processes in the current hydrometallurgy processes for removing Fe(III), Al(III), and Mn(II). The effects of the molar ratios of DNNSA:MSL211, shaking time, temperature, O/A ratios, and equilibrium pH on the extraction behavior of Ni(II) were investigated. Under optimum conditions, the extraction efficiency of Ni(II) was as high as 97.62%, and the separation coefficient of Ni(II) over all impurities was greater than 400. To elucidate the mechanism of the high selectivity of DNNSA-MSL211 toward Ni(II), DFT calculations were carried out to calculate the binding energy (ΔE) and Gibbs free energy (ΔG(ext)) of the extraction process. Furthermore, this paper investigated the entire ″extraction-stripping″ process, demonstrating that the synergistic extraction system of DNNSA-MSL211 avoids neutralization, precipitation, and solid/liquid separation processes, minimizes hazardous waste generation, and shortens process flow while meeting the objectives of sustainable and clean production.
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Catalysts
·
2023
·Vol. 13
·期 2
·329
·
IF 3.9
Xueqing Ren,Peng Xu,Ke Tian,Menghan Cao,Fengyin Shi,Guangshan Zhang
The post-separation of powder catalysts restricts the practical application of peroxymonosulfate (PMS)-based advanced oxidation technology. Hence, we fabricated CuO-Fe2O3-modified Ni foam (CFO-NF) using a facile hydrothermal method for an efficient PMS activation. The CFO-NF/PMS system could achieve a 97.9% tetracycline hydrochloride (TC) removal efficiency in 60 min with four pieces of CFO-NF and 0.4 mmol L−1of PMS. The removal efficiency was maintained at ˃85% even after five cycles, indicating the excellent stability of CFO-NF composites. The conversion among Fe(III)/Fe(II), Cu(II)/Cu(I), and Ni(III)/Ni(II) accelerated the PMS decomposition, verifying the synergy between CuO-Fe2O3and Ni foam. The trapping experiments and EPR detection confirmed that abundant active species (•OH, SO4•−, O2•−, and1O2) were produced in the CFO-NF/PMS system, accounting for the existence of radical pathways and a non-radical pathway, in which1O2(non-radical pathway) was dominated. This study developed a novel CuO-Fe2O3-modified Ni foam with a superior PMS activation performance, a high stability, and a recoverability for eliminating refractory organic pollutants.Keywords:CuO-Fe2O3-modified Ni foam;peroxymonosulfate;tetracycline;stability;singlet oxygen
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