FUEL
·
2025
·
IF 7.5
Xin Zhang,Xiangyun Sun,Li Li,Xinli Zhang,Ao-Bing Wang,Huijuan Xu,Lijun Gao,Yaohui Gao,Hui Liu
Developing low-cost, highly efficient and stable non-noble metal-based electrocatalysts for the hydrogen evolution reaction (HER) is crucial for promoting large-scale alkaline water electrolysis. Here, we report a novel self-supporting Ni(OH) x /Mo-Ni 3 S 2 nanosheet heterostructure grown on nickel foam, demonstrating outstanding catalytic performance for alkaline HER. This heterostructure electrocatalyst exhibits an exceptionally low overpotential of just 33 mV at a current density of 10 mA cm −2 in 1 M KOH solution, surpassing commercial Pt/C catalyst. Moreover, it can operate continuously for 300 h at a high current density of around 130 mA cm −2 . Both experimental and theoretical calculations show that strong electronic coupling at the heterojunction interface optimizes the adsorption energy of molecular water and hydrogen on active sites, thereby enhancing the intrinsic activity. This work offers novel insights for designing high-performance alkaline HER electrocatalysts through coupling doping and heterostructure engineering.
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产品关联
DOI
高影响因子
BIOMASS & BIOENERGY
·
2025
·
IF 5.8
Shiting Chen,Sisi Jia,Nan Xi,Qinglian Wang,Yixiong Lin,Chen Yang,Wang Yin,Ting Qiu
Noble metal catalysts, particularly Ru-based, demonstrate exceptional activity during catalytic hydrotreatment of fast pyrolysis liquids (PLs) from lignocellulosic biomass. However, their high cost poses a major barrier to practical applications. Herein, a series of cost-effective bimetallic Ru-Ni catalysts with varying Ru/Ni ratios (5 wt% metal loading, Ru x Ni y /NC) supported on hierarchical nitrogen-doped carbon materials (NC) were facilely prepared by the wet impregnation method. The performance was evaluated for catalytic hydrotreatment of PLs. The results revealed that the introduction of Ni to Ru significantly enhances catalytic performance. Among the tested catalysts, Ru 4 Ni 1 /NC exhibited optimal activity, achieving the product oils with the highest H/C ratio and lowest thermogravimetric (TG) residue. Under mild condition (200 °C, 6 MPa H 2 , 4 h), the catalyst yielded the product oil with an H/C ratio of 1.49 and a TG residue of 10.7 wt%. When subjected to deep hydrotreatment condition (340 °C, 6 MPa H 2 , 4 h), the catalyst generated the product oil with an H/C ratio of 1.32 and a TG residue of 2.9 wt%. To gain insights into the catalytic mechanism, the adsorption behavior of model components in PLs onto the catalyst was investigated through FT-IR. The results revealed that the incorporation of low electronegativity Ni to Ru, induces the electron transfer from Ni to Ru, resulting in electron enrichment at Ru sites and electron deficient at Ni sites, which promotes the adsorption of substrates onto the catalyst, thereby boosting hydrogenation of PLs. These findings highlight the significant potential of bimetallic Ru-Ni/NC for catalytic hydrotreatment of PLs into intermediates that can be co-processed with vacuum gas oil in FCC refinery for biofuel production.
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产品关联
DOI
高影响因子
Advanced Materials Technologies
·
2025
·Vol. 10
·期 13
·2401998
·
IF 6.2
Yongkuan Wu,Haolong Li,Jinsong Leng,Zhichun Zhang,Yanju Liu
This study successfully fabricates an ultra-lightweight buckypaper(BP)-Ni-Cu layered structure film using vacuum filtration and chemical-electroplating methods, achieving a thickness of 34 µm and a surface density of 50 g m − 2 . The film exhibits a notably low surface square resistance of 9.5 mΩ □ −1 . Regarding electromagnetic shielding performance, it exhibits exceptional effectiveness across multiple frequency bands: 96.67 dB in the Partial S-band (2.6–4 GHz), 65.05 dB in the C1 band (4–6 GHz), 64.23 dB in the C2 band (6–8 GHz), 87.04 dB in the X band (8–12 GHz), and 90.46 dB in the Ku band (12–18 GHz). In terms of mechanical properties, compared with the tensile fracture strength of 33.67 MPa of the BP film, the tensile fracture strength of the BP-Ni film is enhanced to 51.9 MPa, and that of the BP-Ni-Cu film is elevated to 49.43 MPa. Additionally, the film demonstrates good thermal stability at temperatures up to 300 ° C. It also exhibits favorable electrical conductivity. Overall, considering its excellent characteristics, including multi-band shielding and ultra-lightweight properties, this film presents a novel and highly promising solution for aerospace electromagnetic shielding applications.
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Yunfeng Wang,Yingang Gui,Shasha He,Jiacheng Yang
The application of conventional sensors is limited due to energy supply issues and environmental problems, and current triboelectric nanogenerator (TENG) based self-powered sensing systems is hard to meet the specific requirement. In this paper, TiO 2 /Ni/C composites were prepared using MOF-derived Ni/C materials for SO 2 F 2 detection at room temperature. The excellent pore structure and high electrical conductivity of Ni/C material greatly improve the sensitivity properties of TiO 2 . The TiO 2 /Ni/C composites-based SO 2 F 2 sensor exhibits a wide detection range of 5–200 ppm concentration and a fast response/recovery time of 26 s/9 s, while its response value for 200 ppm SO 2 F 2 is 18.34 times higher than that of the pure TiO 2 -based sensor. Furthermore, by modifying the PVDF film with TiO 2 , the permittivity of PVDF is greatly improved, and the surface potential is 2.6 times higher than that of pure PVDF film. Eventually, a dual-layer hybrid TENG based on TiO 2 /PVDF composite film was constructed. Its upper TENG powers the TiO 2 /Ni/C composite sensor, and the lower hybrid TENG drives the thermohygrometer to realize a self-powered temperature and humidity-corrected SO 2 F 2 sensing system, which can accurately implement SO 2 F 2 gas concentration alarms at 10 ppm, 50 ppm, and 100 ppm at different humidity levels. This work broadens the application of TENG in the field of self-powered gas sensing while providing a new idea to achieve the trace detection of SO 2 F 2 at room temperature.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Yongkun Liu,Qiuling Lu,Zheng Huang,Shiqing Sun,Bo Yu,Uwamahoro Evariste,Guohua Jiang,Juming Yao
In this work, a novel flexible electrode material for supercapacitor is prepared by electrodeposition of Ni-Co-S interconnected nanosheet arrays on N-doped hierarchical porous carbon nanofibers (Ni-Co-S@N-pCNFs). The electrode exhibits a remarkable specific capacitance of 520.2 F g -1 at the current density of 0.2 A g −1 and 670 F g -1 at 2 mV s −1 . The activated charcoal (AC) loaded N-doped porous carbon nanofibers (AC@N-pCNFs) as electrode is also prepared which exhibits a specific capacitance of 257.2 F g -1 at 0.2 A g −1 , as well as excellent cycling stability with a capacitance retention of 92.6% after 5000 cycles. Furthermore, the Ni-Co-S@N-pCNFs as the positive electrode , active carbon loaded N-doped hierarchical porous carbon nanofibers (AC@N-pCNFs) as negative electrode , and KOH/NKK hybrids as both the electrolyte and separator are assembled into flexible asymmetric supercapacitor . The assembled supercapacitor device without using any current collectors or binders shows a high energy density of 21.6 Wh·kg −1 at a power density of 134.9 W kg −1 and robust long-term cycling stability retaining over 90.0% after 3000 cycles at 1.0 A g −1 . The as-assembled asymmetric supercapacitors (ASCs) have an outstanding mechanical flexibility and electrochemical stability and no significant attenuation occurred during cycling under different bending states.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Junnan Wang,Qijie Wang,Wei Wang,Pinbo Li,Yazhen Zhao,Junjian Zhai,Wu Zhao,Han Zhang,Jiangni Yun,Zhiyong Zhang,Jiangxiao Tian,Zhouhu Deng,Junfeng Yan
In this study, a unique dual-spatial three-dimensional (3D) porous structure comprising Ni/C hollow microspheres was prepared from a Ni-based metal organic framework (Ni-MOF) embedded in graphene foam (GF) by the solvothermal method followed by calcination . The graphene foam-based composite, Ni/C@GF (NCGF), exhibited a stable spatial conductive network structure and diverse porous architecture, promoting the microwave absorption (MA) properties of composites. The NCGF with a Ni/C and GF ratio of 1:2.5 displayed a reflection loss (RL) value of ─63 dB with 15 wt% loading, while the thickness is only 1.76 mm. Further, its effective absorption bandwidth (EAB) reached to 5.4 GHz at 2 mm thickness. In addition, when the RL value is less than ─20 dB, the NCGF still manifests a wider bandwidth (2.2 GHz) and a relatively low thickness (1.76 mm). In addition to the extraordinary attenuation ability, the excellent MA performance is mainly ascribed to optimized impedance matching characteristics. Moreover, multiple reflections promoted by the dual-space structure also play a significant role during the microwave absorption process.
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DOI
高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2020
·Vol. 29
·期 11
·7239-7249
·
IF 1.652
Sang Changcheng,Cai Xiaoping,Zhu Lu,Ren Xuanru,Niu Gao,Wang Xiaohong,Feng Peizhong
To achieve the low energy consumption and high strength joining between Ti and Ni, a novel joining method (rapid thermal explosion, TE) was developed for joining dissimilar metals using Ti-Al mixture powders as flux. The TE reaction temperature of Ti-Al flux was measured, and the microstructure and mechanical properties of Ti/Ni joint were investigated. The results reveal that the combustion temperature of the Ti-Al powder interlayer is 1103 °C, which is higher than the joining temperature, and an obvious self-exothermic phenomenon lasts 20 s. The intermetallic compound diffusion layers formed at both interfaces mainly owing to the diffusion of Al and the growth activation energy of diffusion layers near both interfaces are 79.68 kJ/mol and 38.26 kJ/mol, respectively. Based on the sheer strength and diffusion layer, the formation mechanism of Ti/Ni joints is metallurgical bonding through atomic diffusion and formation of the diffusion layer.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Ning Ma,Xiaobo Ma,Ling Ma,Xiaomeng Wang,Zhijie Cao
The high desorption temperature and sluggish kinetics of NaAlH 4 limit its applications in hydrogen storage . To address these issues, a Ni nanoparticles-loaded TiN composite catalyst with excellent thermodynamic stability and catalytic activity was constructed. The addition of 5 wt% Ni 10 @TiN reduced the initial dehydrogenation temperature of NaAlH 4 to 81 °C, and a total amount of 5.4 wt% H 2 could be released within 20 min at 170 °C. The activation energies for the two-step dehydrogenations were significantly reduced to 66.3 kJ/mol and 81.4kJ/mol, respectively, which were 43 % and 36 % lower than that of pure NaAlH 4 . Experimental results and theoretical calculations suggested that these remarkable improvements were originated from the grain refinement of NaAlH 4 and multi-fold catalytic activities of Ni 10 @TiN catalyst like providing catalytic active sites, facilitating the breaking of Al-H and H-H bonds, and increasing hydrogen diffusion channels. These findings may offer new ideas for designing high-efficiency catalysts for solid-state hydrogen storage materials.
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DOI
高影响因子
CHINESE CHEMICAL LETTERS
·
2021
·Vol. 33
·期 6
·3272-3276
·
IF 6.779
Na Li,Guangmeng Qu,Xixi Zhang,Shunshun Zhao,Chenggang Wang,Gang Zhao,Peiyu Hou,Xijin Xu
The selection and development of cathode of alkaline zinc batteries (AZBs) is still hindered and often leads to poor rate capability and short cycle life. Here, amorphous hollow nickel-cobalt-based sulfides nanocages with nanosheet arrays (AM-NCS) are designed and constructed with ZIF-67 as the self-template to exchange with Ni 2+ and S 2− by using a two-step ion exchange method. The synthesized AM-NCS possess the high specific capacity (160 mAh/g at 2 A/g), and the assembled battery has excellent rate performance (146 mAh/g reversible capacity at 5 A/g). The assembled device has excellent rate performance (155 mAh/g at 2 A/g) and long cycling stability (7000 cycles, 62.5% of initial capacity). The excellent electrochemical properties of the electrode materials are mainly attributed to the unique structure, in particular, polyhedron structure with hollow structure can improve the cyclic stability, and the amorphous structure can expose more reactive sites on the surfaces of nickel, cobalt and sulfur. This work provides a new strategy for the design and fabrication of high performance cathode materials for AZBs.
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 13
·132505
·
IF 3.721
Xiangyu Ren,Jie Tang,Cunying Xu,Shuxian Wang,Jianru Li,Jingling Lu,Yixin Hua,Qibo Zhang,Juanjian Ru
The electrodeposition behavior of Zn–Ni alloy on a Cu electrode has been studied in the choline chloride-urea-ethylene glycol (ChCl-urea-EG) based deep eutectic solvent (DES). The nickel and zinc sources are introduced into the solvent by the dissolution of nickel oxide (NiO) and zinc oxide (ZnO), respectively. Cyclic voltammetry indicates that the electroreduction of Ni(II) or Zn(II) species in the DES is a diffusion-controlled process and the diffusion coefficient of Zn(II) species is an order of magnitude larger than that of Ni(II) species. Under the examined condition, the anomalous codeposition of Zn–Ni alloy is observed, which is different from normal codeposition of Zn–Ni alloy in similar DESs using metal chlorides as precursor. The deposition potential is found to play an important role in controlling the composition and surface morphology of the resultant Ni-Zn alloys. The phase structure of the deposits depends on the Ni content, and changes from a mixture of η-phase and γ-phase to single γ-phase with (411) plane orientation. A mechanism for this electrodeposition process has been proposed on the basis of the formation of complex ions [NiO·urea·Cl]−, [ZnO∙urea·Cl]− and [ChCl·O·urea]2− in ChCl-urea-EG-ZnO-NiO electrolyte during the electrodeposition, emphasizing that the metal oxides were dissolve in DES by forming metal complex ions, the cathodic reduction of metal complex ions generates complex ions [ChCl·O·urea]2− with alloys (NixZny), and [ChCl·O·urea]2− is oxidized to release O2 at anode.
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DOI
高影响因子
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
·
2021
·Vol. 100
·期 11
·3381-3394
·
IF 2.007
Lin Li,Shizhan Sheng,Huihua Wang,Tianpeng Qu,Dong Hou,Deyong Wang,Minqi Sheng
Ni-P alloys have been successfully electrodeposited in the choline chloride and ethylene glycol with a molar proportion of 1:2(CE) electrolyte and their activities toward hydrogen evolution reaction (HER) have been also evaluated. The electrodeposition of Ni-P alloy follows a co-deposition process, and the bulk growth of which depends on an instantaneous nucleation under diffusion control. The morphologies of Ni-P alloys are significantly influenced by the P content, and low P content can lead to a smooth surface. As expected, Ni-9.0 wt.% P alloy shows an impressive HER catalytic performance with a Tafel slope (b) of 72.9 mV dec −1 and an overpotential of 105 mV at 50 mA, in agreement with its large ECSA ( C dl = 3.25 mF cm −2 ) and small interface charge-transfer resistance. More interestingly, Ni-9.0 wt.% P alloy exhibits a sustainable catalytic activity toward HER after 1000 cycling test with a tiny potential decline of ~10 mV at 100 mA cm −2 . Such a striking HER activity of Ni-9.0 wt.% P alloy can be attributed to the synergistic effect among the induced active sites from lattice contraction, negatively charged P incorporation, and a mixed nanometre crystal and amorphous structure. Thus, Ni-P alloy electrodeposited in a CE-based electrolyte can be used as a promising electrode material with high HER activity in alkaline solutions for hydrogen production.
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 3
·235
·
IF 2.8
Chi Mengjiao,Liu Yahan,Zhou Tao,Mao Minmin,Liu Bing,Wang Ge,Song Kaixin
A cold sintering process (150 °C, 90 min, and 800 MPa) is employed to pre-densify (Mg 1 − x Ni x ) 3 B 2 O 6 (0.00 ≤ x < 0.10, MNBO) ceramics to 80% relative density, followed by a post-annealing treatment between 800 and 950 °C. The origin of optimizations of the sintering, microstructure, and dielectric properties of Ni 2+ -substituted Mg 3 B 2 O 6 ceramic are investigated in detail. All the samples are the single phase of magnesium borate, as confirmed by XRD and Raman spectra. The crystallographic lattice parameters of all compositions are obtained by full-pattern Rietveld refinement. It is found that the ε r of MNBO ceramics is related to the relative density and the ionic polarization of chemical bonds. The change of atomic filling fraction and half peak width is found to be an important effect on the Q × f value. The optimum microwave dielectric properties ( ε r = 6.92, Q × f = 24,336 GHz, τ f = − 53.43 ppm/°C) and the relative density of MNBO ceramics (92.4%) are obtained for composition with 4% Ni 2+ .
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DOI
高影响因子
危险品化学品经营许可证（带存储）