JOURNAL OF SOLID STATE CHEMISTRY
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2021
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IF 3.498
Yanjie Duan,Zhixiong Huang,Xiangbin Dong,Jingyu Ren,Lin Lin,Shuhong Wu,Runping Jia,Xiaowei Xu
Transition metal oxalates have attracted people's attention owing to their low cost, low lithium insertion potential and high theoretical reversible capacities. Disappointingly, high irreversible capacity thanks to the formation of SEI as well as the consumption and exfoliation of active materials during the process of cycling severely restrict its application of it. In this work, a comprehensive evaluation of Co, Ni, Cu and Zn doped manganese oxalate was made. All samples are synthesized via facile and time-saving microwave hydrothermal method . It is intriguing that merely 30 min is required to accomplish the entire process and all samples possess fine electrochemical performance. As far as the four bimetallic oxalates, the resulting Mn 0·5 Ni 0·5 C 2 O 4 exhibits the optimum performance (746.2 mA h g −1 after 100 cycles at 0.2 A g −1 and 546.7 mA h g −1 at 1 A g −1 after 400 cycles), which can be attributed to one-dimensional rod-like morphology of Mn 0·5 Ni 0·5 C 2 O 4 as well as the synergistic and catalytic effect of Mn and Ni, resulting in faster electrode kinetics . Mn 0.5 Ni 0.5 C 2 O 4 displays incalculable potential and can be applied in the highly reversible lithium-ion batteries.
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ACS Nano
·
2026
·
IF 17.3
Wenxiang Hou,Yusheng Zhang,Xuefei Chen,Xun Wang,Dayu Li,Wendai Cheng,Xixi Gong,Qu Wang,Ruofan Huang,Guanyuan Su,Chunmei Zhang,Liang Yang
Abstract Transition-metal hydroxides and oxides are widely used in optoelectronic and electrochemical devices, yet precise control over their three-dimensional (3D) microarchitecture and morphology remains a major challenge for microscale device fabrication. Here, we report a laser-confined interfacial nucleation and hierarchical growth (LCING) strategy that enables direct laser printing of Ni(OH)2/NiO microarchitectures with high spatial resolution and programmable porous structures. The localized photothermal field drives interfacial nucleation and hierarchical growth, allowing conformal integration of hydroxide microstructures and flexible construction of complex 3D geometries. We further elucidate the coupled mechanisms of mass transport, heat transfer, and reaction kinetics governing the LCING process. By rationally tuning laser printing parameters, the morphology and porosity of the resulting microstructures can be precisely controlled. The printed Ni(OH)2/NiO microdevices enable high-resolution structural color patterning and enhanced sensing performance, with the 3D porous Ni(OH)2/NiO architectures showing improved gas-sensing responses compared with lower-dimensional and nonporous counterparts. This work presents a versatile and programmable approach for high-precision manufacturing of functional metal-oxide microdevices.
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Xueqin Zhu,Minjian Yang,Dengfei Mu,Yiyi Gao,Li He,Liqiang Ma
Hydrogen storage in the solid state is considered a key technology for developing commercial applications of hydrogen energy. With the addition of efficient nanocatalysts, magnesium (Mg) is a promising approach for overcoming the threshold for hydrogen storage materials. Mg–Ni–Ti3C2 composites were created in this study by integrating nanoscale nickel (Ni) and Ti3C2Tx MXene nanosheets with Mg particles using a mechanical ball milling process. Compared with incorporating Ni nanoparticles or Ti3C2Tx MXene nanosheets alone, the combination of Ni and Ti3C2Tx MXene enhanced the dehydrogenation performance of magnesium hydride (MgH2). The ideal combination of a rapid hydrogen uptake/release rate and high hydrogen storage capability was achieved by properly controlling the proportion of additives. The prepared Mg–2Ni/Ti3C2 composite possessed superior hydrogen storage properties, releasing 3.96 wt % hydrogen at 300 °C, whereas additive-free Mg released almost no hydrogen under the same conditions. Furthermore, Mg–2Ni/Ti3C2 absorbed 3.16 wt % hydrogen even at 275 °C. The Mg–2Ni/Ti3C2 composite exhibited a dehydrogenation activation energy of 75.0 kJ mol–1, which was 60.4 kJ mol–1 less than that of pristine Mg. After 10 cycles, 96.1% of the hydrogen capacity was retained, exhibiting a superior cycling stability. According to the catalytic mechanism study, the surprisingly enhanced hydrogen storage property of MgH2 is attributed to the “hydrogen pump” effect of Mg2Ni/Mg2NiH4 combined with the catalytic, “facilitated hydrogen pump,” and confinement roles of Ti3C2Tx MXene nanosheets.
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ACS Omega
·
2023
·
IF 4.1
Chuangchuang Yang,Anpeng Hu,Qiaoling Dai,Qinghe Yang,Ranran Hou,Zhiwei Liu
Hydrodesulfurization (HDS) is an important process for the production of clean fuel oil, and the development of a new environmentally friendly, low-cost sulfided catalyst is key research in hydrogenation technology. Herein, commercial bulk MoS2 and NiCO3·2NiOH2·4H2O were first hydrothermally treated and then calcined in a H2 or N2 atmosphere to obtain Ni–MoS2 HDS catalysts with different structures. Mechanisms of hydrothermal treatment and calcination on Ni–MoS2 catalyst structures were investigated by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), electron paramagnetic resonance (EPR), and X-ray photoelectron spectroscopy (XPS). The catalytic performance of Ni–MoS2 catalysts was evaluated by the HDS reaction of dibenzothiophene (DBT) on a fixed bed reactor, and the structure–activity relationship between the structures of the Ni–MoS2 catalyst and the HDS of DBT was discussed. The results showed that the lateral size, the number of stacked layers, and the S/Mo atomic ratio of MoS2 in the catalyst decreased and then increased with the increase of the hydrothermal treatment temperature, reaching the minimum at the hydrothermal treatment temperature of 150 °C, i.e., the lateral size of MoS2 in the catalyst was 20–36 nm, the number of stacked layers of MoS2 was 5.4, and the S/Mo ratio in the catalyst was 1.80. In addition, the effects of different calcination temperatures and calcination atmospheres on the catalyst structures were investigated at the optimum hydrothermal treatment temperature. The Ni–Mo–S and NixSy ratios of the catalysts increased and then decreased with the increasing calcination temperature under a H2 atmosphere, reaching a maximum at a calcination temperature of 400 °C. Therefore, DBT exhibited the best HDS activity over the H-NiMo-150–400 catalyst, and the desulfurization rate of DBT reached 94.7% at a reaction temperature of 320 °C.
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高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Jiaxing Chen,Shufang Wu,Xinlin Zhang,Yongjun Liu
Unsupported MoS2 nanosheets are promising hydrodesulfurization (HDS) catalysts that can effectively convert sulfur species in diesel to hydrocarbons and H2S during the production process of fossil fuels. However, the active site density of MoS2-based catalysts is limited due to the existence of a large amount of inert basal planes, hindering the improvement of MoS2 HDS activity. Herein, a strategy that combines defect control and metal doping is proposed to boost the catalytic activity of unsupported MoS2 nanosheets. By adjusting hydrothermal reaction conditions, few-layered defect-rich MoS2 (DR-MoS2(FL)) is synthesized to significantly enhance the HDS efficiency, which is further improved by incorporating Ni atoms in basal planes, achieving the highest thiophene conversion of 92.3% at 280 °C. Moreover, the Ni-doped DR-MoS2(FL) catalyst exhibits excellent stability with the high activity retained in the recycling reaction. The effect of Ni dopants on the electronic structure and adsorption behavior of the MoS2 basal planes is demonstrated by density functional theory calculation. This work reveals a facile method to tailor the basal planes with the formation of more Ni–Mo–S active sites for highly efficient MoS2 HDS catalysts.
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MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Chao Chen,Jiayue Ren,Pengcheng Zhao,Jin Zhang,Yongjun Hu,Junjie Fei
Dopamine (DA) is an important neurotransmitter in human’s brain, which has direct connection to diseases like Parkinson’s disease, schizophrenia, etc. Therefore, the sensitive and rapid quantitative detection of DA is essential for medical diagnosis and disease prevention. To construct a novel electrochemical sensor for DA detection, nickel-based metal–organic frameworks (Ni–MOF) were synthesized through a hydrothermal method and combined with β-cyclodextrin. Under optimal experimental conditions, the sensor exhibited a wide linear detection range (0.7–310.2 μM) and a low detection limit (0.227 μM). Furthermore, the sensor exhibited satisfactory stability and accuracy in an electrochemical study involving human serum and dopamine hydrochloride injection samples containing DA, and the redox mechanism of the sensor was elucidated. Overall, this study presents a novel electrochemical sensor based on cyclodextrins and MOFs for DA detection.
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Materials Today Communications
·
2023
·
IF 3.8
Qian Gao,Jiansong Li,Ruina Ma,Yongzhe Fan,An Du,Mingxu Yang,Xue Zhao,Yi Bian
A simple constant-potential electrodeposition process was used to manufacture a superhydrophobic Ni-plated stainless-steel mesh (SNSSM) with high corrosion resistance and chemical stability for oil–water separation. This novel Ni plating had a mountain-like micro/nano structure. This resulted in a rough surface that was modified with stearic acid (SA) to provide a good superhydrophobicity as well as remarkable corrosion resistance, chemical stability, and oil–water separation. The effects of the electrodeposition potential and time on the microstructural evolution , wettability , and corrosion resistance were discussed. The SNSSM obtained by deposition at − 2.0 V for 60 min and modifying the surface with SA, had a water contact angle (WCA) of 156.5° and an oil contact angle (OCA) of 0°. The corrosion current density of the superhydrophobic coating in a 3.5 wt% NaCl solution was 1.737 × 10 −8 A/cm 2 . The plating remained superhydrophobic after 96 h of immersion in the NaCl solution and maintained its superhydrophobicity in an environment with pH= 2–12. The SNSSM exhibited high separation efficiency and separation flux for mixtures of oil or organic solvents with water. In addition, it continued to exhibit a separation efficiency > 94.0% and stable reusability even after 30 cycles of separation.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yujun Zhao,Yu Sun,Haibo Li,Suyuan Zeng,Rui Li,Qingxia Yao,Hongyan Chen,Yao Zheng,Konggang Qu
The low-potential hydrazine oxidation reaction (HzOR) can replace the oxygen evolution reaction (OER) and thus assemble with the hydrogen evolution reaction (HER), consequently achieving energy-saving hydrogen (H 2 ) production. Notably, developing sophisticated bifunctional electrocatalysts for HER and HzOR is a prerequisite for efficient H 2 production. Alloying noble metals with eligible non-precious ones can increase affordability, catalytic activity, and stability, alongside rendering bifunctionality. Herein, RuNi alloy deposited onto carbon (RuNi/C) was directly prepared by a simple and highly practical co-reduction method, showing excellent performance for HER and HzOR. Interestingly, to achieve 10 mA cm −2 , RuNi/C only required an ultralow potential of 24 mV for HER, on par with commercial 20 wt% platinum in carbon (Pt/C), and −65 mV for HzOR, surpassing most reported counterparts. Moreover, the two-electrode electrolyzer only required small operation voltages of 57.8 and 327 mV to drive 10 and 100 mA cm −2 , respectively. Driven by a homemade hydrazine (N 2 H 4 ) fuel cell and solar panel, appreciable H 2 yields of 1.027 and 1.406 mmol h −1 were achieved, respectively, exhibiting the energy-saving advantages alongside robust practicability. Moreover, theoretical calculations revealed that alloying with Ru endows bifunctional Ni sites not only with a lower H 2 O dissociation barrier but also with more favorable H* adsorption alongside the reduced energy barrier between HzOR intermediates.
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Journal of Energy Chemistry
·
2023
·
IF 13.1
Qingchun Zhang,Di Liu,Yaping Zhang,Zhiliang Guo,Minpeng Chen,Yuyun Chen,Bo Jin,Yingze Song,Hui Pan
The development of highly active, selective, and stable electrocatalysts can facilitate the effective implementation of electrocatalytic CO 2 conversion into fuels or chemicals for mitigating the energy crisis and climate problems. Therefore, it is necessary to achieve the goal through reasonable material design based on the actuality of the operational active site at the molecular scale. Inspired by the stimulating synergistic effect of coupled heteronuclear metal atoms, a novel Ni-Co atomic pairs configuration (denoted as NiN 3 ©CoN 3 -NC) active site was theoretically screened out for improving electrochemical CO 2 reduction reaction (CO 2 RR). The structure of NiN 3 ©CoN 3 -NC was finely regulated by adjusting Zn content in the precursors Zn/Co/Ni-zeolite imidazolate frameworks (Zn/Co/Ni-ZIFs) and pyrolysis temperature. The structural features of NiN 3 ©CoN 3 -NC were systematically confirmed by aberration-corrected HAADF-STEM coupled with 3D atom-overlapping Gaussian-function fitting mapping, XAFS, and XRD. The results of theoretical calculations reveal that the synergistic effect of Ni-Co atomic pairs can effectively promote the *COOH intermediate formation and thus the overall CO 2 RR kinetic was improved, and also restrained the competitive hydrogen evolution reaction. Due to the attributes of Ni-Co atomic pairs configuration, the developed NiN 3 ©CoN 3 -NC with superior catalytic activity, selectivity, and durability, with a high turnover frequency of 2265 h −1 at −1.1 V (vs . RHE) and maximum Faradaic efficiency of 97.7% for CO production. This work demonstrates the great potential of DACs as highly efficient catalysts for CO 2 RR, provides a useful strategy to design heteronuclear DACs, exploits the synergistic effect of multiple metal sites to facilitate complex CO 2 RR catalytic reactions, and inspires more efforts to develop the potential of DACs in various fields.
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Wenbin Ye,Zuyong Feng,Deping Xiong,Miao He
In this work, we synthesized the SnO2–Ni-carbon nanotube (CNT) (SNC) composite anode material by hydrothermal and ball milling methods. In this ternary composite, Ni-doped SnO2 is firmly anchored on the few-walled CNTs. Nano-Ni doping prevents the coarsening of Sn, enhances the electron conductivity, and stabilizes the structure during the process of charging and discharging. In addition, the CNTs can effectively buffer the volume change of SnO2 and improve the conductivity as well as shorten the transport distances of electron and Li+. Accordingly, the SNC shows a large reversible capacity of 1245.7 mA h g–1 after 400 cycles at 0.2 A g–1. With a capacity of 1078.2 mA h g–1 after 850 cycles at 1.0 A g–1, it exhibits a long-term cycling stability. Meanwhile, the capacity can still reach 666.5 mA h g–1 at 5.0 A g–1 with excellent rate capability. The performance and stability of this Ni-doped composite are much better than those of SnO2, implying that SNC is exceedingly prospective as an anode material for lithium-ion batteries.
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Sustainable Energy & Fuels
·
2021
·Vol. 5
·期 6
·1809-1820
·
IF 6.367
Peng Liu,Changzhou Chen,Minghao Zhou,Junming Xu,Haihong Xia,Shibin Shang,Jianchun Jiang
In this work, novel Ni-based catalysts supported on a porous carbon matrix were prepared using a simple hydrothermal method, and studied for the selective hydrotreatment of triolein. Three different catalysts were investigated, including Ni@C-BTC, Ni@C-DHTA and Ni@C-PTA. Of the catalysts studied, the Ni@C-BTC catalyst could achieve the highest conversion (up to 90%) and an excellent cracking ratio (4.61) under moderate reaction conditions (320 °C, 3 MPa, 4 h) in cyclohexane. In addition, other Ni-based catalysts prepared under different temperatures were investigated to study the influence of the calcined temperature on the activity of Ni-based catalysts. The influence of the temperature, H2 pressure, time and catalyst loading amount was investigated for the best performing catalyst (Ni@C-BTC-400). The detailed physicochemical characterization was carried out by means of XRD, SEM, TEM, BET, NH3-TPD, Raman and XPS analysis. In the end, the optimal Ni@C-BTC-400 catalyst could be recycled magnetically, and efficiently applied in the next run for four consecutive recycling tests in the hydrotreatment of triolein.
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APPLIED CATALYSIS A-GENERAL
·
2021
·
IF 5.706
Weizhong Mao,Junhua Liu,Bingqian Yin,Deyu Kong,Shiwen Miao,Fang Wang
We propose a simple preparation route that converting biomass-derived furfural (FUR) to furfuryl alcohol (FOL) over a series of Ni-Mg-Al catalysts (NMA-n) with different molar ratios. Yield of FOL can reach 96.8 % over NMA-2 catalyst under the mild reaction conditions. There are three reasons for this high yield of FOL: (1) The introduction of different amounts of Mg and Al causes the synergistic effect to adjust the acidity and basicity of catalyst, optimal acid-base ratio (0.73:1) and Ni metal site achieve multi-centers collaborative catalysis. (2) Mesoporous structure of this catalyst provides a large number of adsorption sites. Furthermore, the highest O defect /O lattice ratio (1.79:1) create more oxygen vacancies, and then increase the adsorption sites of reactants, thereby making the catalytic activity of NMA-2 higher than most reported Ni-based catalysts. (3) Through kinetic studies, this excellent catalytic performance is related to activation energy (51.8 kJ/mol), which is lower than most reported CTH catalysts.
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